JP2014223114A - Ultrasonic diagnostic apparatus, medical image processing apparatus and medical image processing program - Google Patents

Abstract

A medical image processing apparatus, a medical image processing program, and an ultrasonic diagnostic apparatus capable of extracting partial data representing blood flow from data obtained by ultrasonic Doppler examination. An ultrasonic diagnostic apparatus includes a Doppler processing unit, a calculation unit, a reference storage unit, and a determination unit. The Doppler processing unit obtains Doppler image data including a temporal change in the blood flow velocity of the subject based on the received signal. The calculation unit detects a feature point of the obtained Doppler image data and calculates a time interval between the feature points. The reference storage unit stores a predetermined reference interval in advance. Based on the time interval and the reference interval, the determination unit calculates a blood flow period that is a period representing the blood flow velocity and a non-blood flow period that is a period that does not represent the blood flow velocity among the times of the Doppler image data. Determine. [Selection] Figure 1

Description

  Embodiments described herein relate generally to a medical image processing apparatus, a medical image processing program, and an ultrasonic diagnostic apparatus.

  The ultrasonic diagnostic apparatus generates ultrasonic image data representing a tomographic image of a subject by transmitting an ultrasonic wave into the subject using an ultrasonic probe and receiving a reflected wave thereof.

  Some ultrasonic diagnostic apparatuses can obtain the blood flow velocity of a subject by ultrasonic Doppler examination. Such an ultrasonic diagnostic apparatus transmits and receives ultrasonic waves with respect to a target site having a flow such as blood flow in a subject. The ultrasonic diagnostic apparatus obtains the deviation frequency of the reception frequency with respect to the transmission frequency, and obtains the blood flow velocity of the target site based on the obtained deviation frequency. As the target part, for example, a position corresponding to the inside of a blood vessel or the heart is designated. The ultrasonic diagnostic apparatus transmits and receives ultrasonic waves at the designated position.

JP 2011-87710 A

  During the ultrasonic Doppler examination, there may be a case where the position where the ultrasonic wave is transmitted and received is not a position where there is a flow such as a blood flow due to the body movement of the subject. In this case, the data obtained by the ultrasonic Doppler examination includes a mixture of data representing blood flow and data not representing blood flow. As a result, a user such as a doctor himself / herself determines which part represents data representing blood flow among data including a mixture of data representing blood flow and data not representing blood flow at the time of diagnosis. It was necessary and complicated.

  The problem to be solved by the present invention is to provide a medical image processing apparatus, a medical image processing program, and an ultrasonic diagnostic apparatus capable of extracting partial data representing blood flow from data obtained by ultrasonic Doppler examination. It is to be.

  The ultrasonic diagnostic apparatus according to this embodiment includes a transmission unit, a reception unit, a Doppler processing unit, a calculation unit, a reference storage unit, and a determination unit. The transmission unit transmits ultrasonic waves from the ultrasonic probe to the subject. The receiving unit receives a reflected wave from the subject and outputs a received signal based on the received reflected wave. The Doppler processing unit obtains Doppler image data including a temporal change in the blood flow velocity of the subject based on the received signal. The calculation unit detects a feature point of the obtained Doppler image data and calculates a time interval between the feature points. The reference storage unit stores a predetermined reference interval in advance. Based on the time interval and the reference interval, the determination unit calculates a blood flow period that is a period representing the blood flow velocity and a non-blood flow period that is a period that does not represent the blood flow velocity among the times of the Doppler image data. Determine.

It is a block diagram which shows the ultrasonic diagnosing device which concerns on this embodiment. It is a schematic diagram which shows the outline of the ultrasound diagnosing device which concerns on this embodiment. It is a schematic diagram which shows the outline of the ultrasound diagnosing device which concerns on this embodiment. It is a schematic diagram which shows the outline of the ultrasound diagnosing device which concerns on this embodiment. It is a schematic diagram which shows the outline of the ultrasound diagnosing device which concerns on this embodiment. It is a flowchart which shows operation | movement of the ultrasonic diagnosing device which concerns on this embodiment. It is a flowchart which shows operation | movement of the ultrasonic diagnosing device which concerns on this embodiment. It is a block diagram which shows the ultrasonic diagnosing device which concerns on this embodiment. It is a flowchart which shows operation | movement of the ultrasonic diagnosing device which concerns on this embodiment. It is a schematic diagram which shows the outline of the ultrasound diagnosing device which concerns on this embodiment. It is a schematic diagram which shows the outline of the ultrasound diagnosing device which concerns on this embodiment. It is a flowchart which shows operation | movement of the ultrasonic diagnosing device which concerns on this embodiment. It is a block diagram which shows the medical image processing apparatus which concerns on this embodiment. It is a flowchart which shows operation | movement of the medical image processing apparatus which concerns on this embodiment.

<First Embodiment>
[Constitution]
FIG. 1 is a block diagram showing the configuration of the ultrasonic diagnostic apparatus 1a of this embodiment. The ultrasonic diagnostic apparatus 1a includes a transmission unit 3 that generates ultrasonic waves in the ultrasonic probe 2, a reception unit 4 that receives an echo signal from the ultrasonic probe 2, a signal processing unit 5, a calculation unit 11, and a reference memory. A unit 14, a determination unit 15, an image generation unit 6, a display control unit 7, a system control unit 8, a display unit 10, and an operation unit 9.

(Ultrasonic probe 2)
The ultrasonic probe 2 is a one-dimensional array probe in which a plurality of ultrasonic transducers are arranged in a line in the scanning direction, or a two-dimensional array probe in which a plurality of ultrasonic transducers are two-dimensionally arranged. It is done. In addition, a mechanical one-dimensional array probe that swings a plurality of ultrasonic transducers arranged in a line in the scanning direction in a swinging direction orthogonal to the scanning direction may be used. The ultrasonic probe 2 transmits ultrasonic waves to the subject and receives reflected waves from the subject. The ultrasonic probe 2 outputs a signal based on the received reflected wave to the receiving unit 4 as an echo signal.

(Transmitter 3)
The transmission unit 3 transmits ultrasonic waves from the ultrasonic probe 2 to the subject. The transmission unit 3 supplies an electric signal to the ultrasonic probe 2 to generate an ultrasonic wave. The transmission unit 3 includes a transmission delay circuit and a pulsar circuit (not shown). The transmission delay circuit performs transmission focus with a delay when transmitting ultrasonic waves. The pulsar circuit includes a pulsar corresponding to the number of paths (channels) corresponding to each ultrasonic transducer, generates a drive pulse at a delayed transmission timing, and applies to each ultrasonic transducer of the ultrasonic probe 2. Supply.

(Receiver 4)
The receiving unit 4 receives an echo signal from the ultrasonic probe 2. The receiving unit 4 performs delay processing on the received echo signal, thereby converting the analog echo signal into phase-shifted (received beam-formed) digital data.

  The receiving unit 4 includes, for example, a preamplifier circuit (not shown), an A / D converter, a reception delay circuit, and an adder. The preamplifier circuit amplifies the echo signal from each ultrasonic transducer of the ultrasonic probe 2 for each reception channel. The A / D converter converts the amplified echo signal into a digital signal. The reception delay circuit gives a delay time for determining reception directivity to the echo signal converted into the digital signal. The adder performs phasing addition of the echo signal given the delay time. By the phasing addition, the reflection component from the direction according to the reception directivity is emphasized. The receiving unit 4 outputs the signal subjected to the phasing addition to the signal processing unit 5 as a received signal.

(Signal processing unit 5)
The signal processing unit 5 includes a Doppler processing unit 50. The Doppler processing unit 50 receives a reception signal based on the reflected wave from the subject to which the ultrasonic wave has been transmitted. The Doppler processing unit 50 extracts the Doppler shift frequency component by phase detection of the received signal, and obtains the distribution of the Doppler shift frequency component by performing FFT (Fast Fourier Transform) processing. The Doppler processing unit repeats this at predetermined time intervals to obtain Doppler data representing a temporal change in the blood flow velocity of the subject. The Doppler processing unit 50 outputs the generated Doppler data to the image generation unit 6 and the trace unit 12.

  Further, the signal processing unit 5 may include a tomographic image processing unit 51. The tomographic image processing unit 51 obtains tomographic data of the subject based on the received signal. The tomographic image processing unit 51 receives the received signal from the receiving unit 4 and visualizes the amplitude information of the received signal. At this time, the tomographic image processing unit 51 performs band-pass filter processing on the received signal, detects an envelope of the received signal that has been subjected to band-pass filter processing, and logarithmically detects the detected envelope data. The tomographic data is obtained by performing compression processing by conversion. The tomographic image processing unit 51 outputs the obtained tomographic data to the image generating unit 6.

  The signal processing unit 5 may include a color mode processing unit 52. Based on the received signal, the color mode processing unit 52 obtains color mode data representing the blood flow information of the subject superimposed on the tomographic image. The color mode processing unit 52 visualizes blood flow information. The blood flow information includes information such as speed, dispersion, or power. The blood flow information is generated as hue information, for example. The color mode processing unit 52 outputs the obtained color mode data to the image generation unit 6.

(Image generation unit 6)
The image generation unit 6 generates Doppler image data based on the Doppler data input from the determination unit 15. For example, the image generation unit 6 generates Doppler image data in which the Doppler shift frequency distribution indicated in the Doppler data is spectrum-displayed with frequency on the vertical axis, time on the horizontal axis, and intensity for each frequency component as luminance (tone). . This Doppler image data represents a time change of the Doppler frequency distribution. The image generation unit 6 may generate ultrasonic image data based on the tomographic data input from the tomographic image processing unit 51 and the color mode data input from the color mode processing unit 52. The image generation unit 6 includes, for example, a DSC (Digital Scan Converter). The image generation unit 6 converts tomographic data and color mode data represented by a scanning line signal sequence into tomographic image data and color mode image data represented by an orthogonal coordinate system, thereby producing a tomographic image as an ultrasonic image. Image data and color mode image data are generated (scan conversion process).

(Display control unit 7)
The display control unit 7 causes the display unit 10 to display a Doppler image based on the Doppler image data from the image generation unit 6. The display control unit 7 may display a tomographic image based on the tomographic image data from the image generation unit 6 on the display unit 10 together with the Doppler image. Further, the display control unit 7 may superimpose a color mode image based on the color mode image data from the image generation unit 6 on the tomographic image and cause the display unit 10 to display the color mode image.

(System control unit 8)
The system control unit 8 controls each unit of the ultrasonic diagnostic apparatus 1a. The system control unit 8 includes, for example, a storage device 8a and a processing device 8b. The storage device 8a stores a computer program for executing the function of each unit of the ultrasonic diagnostic apparatus 1a. The processing device 8b implements the above functions by executing these computer programs.

(Display unit 10)
The display unit 10 displays an ultrasonic image. The display unit 10 includes a display device such as a CRT (Cathode Ray Tube) or an LCD (Liquid Crystal Display).

(Operation unit 9)
In response to an operation by the user, the operation unit 9 inputs signals and information corresponding to the contents of the operation to each unit via the system control unit 8. For example, the user inputs a freeze instruction or the like to the ultrasonic diagnostic apparatus 1a using the operation unit 9 during the ultrasonic examination. The operation unit 9 is configured by, for example, a keyboard, a mouse, a touch panel, and the like.

(Calculation unit 11)
When receiving a freeze instruction from the user, the calculation unit 11 detects a feature point of Doppler data and calculates a time interval between the detected feature points. The calculation unit 11 includes a trace unit 12 and a detection unit 13.

(Trace part 12)
When receiving a freeze instruction from the user, the trace unit 12 receives Doppler data from the signal processing unit 5 and traces the maximum flow velocity point at each time point indicated in the Doppler data in the time axis direction. The trace unit 12 adds the traced data to the Doppler data and outputs the data to the detection unit 13 as trace data. Hereinafter, Doppler data and trace data correspond one-to-one.

(Detector 13)
The detection unit 13 receives the trace data from the trace unit 12 and detects a feature point of the trace data. FIG. 2 is a schematic diagram showing trace data. For example, the detection unit 13 obtains the first maximum point PF of the trace data TD as the feature point. Then, the detection unit 13 obtains a local maximum point PD in which the size of the trace data TD is greater than or equal to the threshold value SD as the feature point for the time after the point of the feature point. The threshold value SD is determined, for example, as a value obtained by multiplying the size of the first maximum point PF (first maximum value) by a predetermined coefficient. This predetermined coefficient is stored in the detection unit 13 in advance. For example, when the coefficient is stored as “0.8”, the detection unit 13 obtains the first maximum value PF, and determines “(first maximum value) × 0.8” as the threshold value SD. The detection unit 13 sequentially obtains a maximum point PD having a size equal to or larger than the determined threshold value SD for the time after the first maximum point, and detects it as a feature point.

  Alternatively, the detection unit 13 may store the shortest interval in advance and detect a local maximum point PD having a size equal to or larger than the threshold value SD obtained in a time interval longer than the shortest interval as a feature point. In other words, the detection unit 13 does not detect, as a feature point, a maximum point having a size equal to or larger than the threshold value SD obtained in a time interval shorter than the stored shortest interval. For example, when the detection unit 13 stores in advance the shortest time of “0.2 seconds”, a maximum point having a size greater than or equal to the threshold value SD obtained in a time after 0.2 seconds from a certain feature point is a feature point. Detect as. In this case, even if a local maximum point greater than or equal to the threshold value SD is obtained 0.1 seconds after a certain feature point, the detection unit 13 does not detect the local maximum point as a feature point. As a result, even if noise occurs in a short time interval from a certain feature point and a maximum point equal to or greater than the threshold value SD is obtained, the detection unit 13 does not detect the maximum point as a feature point. The detection unit 13 detects feature points for the entire time of the received trace data TD, and calculates a time interval TM between the detected feature points. For example, when the detection unit 13 detects ten feature points, the detection unit 13 calculates each of the nine time intervals TM. The detection unit 13 assigns the detected feature point and the calculated time interval TM to the trace data TD and outputs the trace data TD to the determination unit 15.

(Reference storage unit 14)
The reference storage unit 14 stores a predetermined reference interval in advance. This reference interval is set in advance based on the heart rate of the subject and is shown in a predetermined range. For example, the reference storage unit 14 stores in advance a range from 0.6 seconds to 1.2 seconds as a reference interval. When this range is converted into a heart rate, it corresponds to a range from 100 bpm (Beats Per Minute) to 50 bpm. Note that the heart rate may vary depending on the subject, and the reference interval is not limited to the above-described range. For example, a range from 0.75 second to 2 seconds (corresponding to a range from 80 bpm to 30 bpm), a range from 0.5 seconds to 0.75 seconds (corresponding to a range from 120 bpm to 80 bpm), etc. May be set as appropriate.

(Determination unit 15)
Based on the time interval of the feature points and the reference interval, the determination unit 15 includes a blood flow period that is a period that represents the blood flow velocity and a non-blood flow that is a period that does not represent the blood flow velocity in the time of the Doppler data. Determine the period. At this time, the determination unit 15 receives the trace data to which the feature point and the time interval between the feature points are given from the detection unit 13 and reads the reference interval from the reference storage unit 14. In addition, the determination unit 15 compares the received feature point time interval with the range indicated by the read reference interval for each feature point time interval. When the time interval between feature points is within the range indicated by the reference interval, the determination unit 15 determines the time interval as a blood flow period. Further, when the time interval between the feature points is not within the range indicated by the reference interval, the determination unit 15 determines the time interval as a non-blood flow period. Thereby, the time indicated in the Doppler data is discriminated into a blood flow period and a non-blood flow period. For example, when the storage unit previously stores a range from 0.6 seconds to 1.2 seconds as a reference interval range, the determination unit 15 determines that the time interval between feature points is a range from 0.6 seconds to 1.2 seconds. Is determined as a blood flow period, and a period in which the time interval between feature points is not within the range of 0.6 to 1.2 seconds is determined as a non-blood flow period. The discriminating unit 15 outputs discrimination information for discriminating between the blood flow period and the non-blood flow period for the time indicated by the Doppler data to the display control unit 7.

  In the time measured for blood flow in the time of Doppler data, the maximum flow velocity point of blood flow appears for each time interval based on the heart rate of the subject. On the other hand, in the time when blood flow is not measured in the Doppler data time, the maximum point that is larger than the threshold value generally does not appear, and thus the feature point is not detected. Also, exceptionally, even if a maximum point that is greater than or equal to the threshold value is generated due to noise during the time when blood flow was not measured, a feature point due to this may be detected. The maximum point is detected at a time interval that is not within the range. When a feature point appears in the reference range, the determination unit 15 determines a period during which blood flow is not measured as a blood flow period. In order to prevent this, the determination unit 15 may determine, as a blood flow period, a period in which time intervals that are within the reference interval range are repeated a plurality of times. Accordingly, the determination unit 15 determines a period in which the time interval between feature points is within the reference interval as a blood flow period, and determines a period in which the feature point time interval is not within the reference interval as a non-blood flow period. can do.

(Display control unit 7)
The display control unit 7 receives the Doppler image data from the image generation unit 6 and the input of the identification information from the determination unit 15, refers to the received identification information, and among the Doppler images based on the received Doppler image, The Doppler image and the Doppler image in the non-blood flow period are displayed on the display unit 10 in different display modes. FIG. 3 is a schematic diagram showing the Doppler image DP. For example, the display control unit 7 displays the Doppler image DP of the blood flow period BT and the Doppler image DP of the non-blood flow period NBT on the display unit 10 as different display modes (in FIG. 3, in FIG. The period NBT is shaded). Thereby, the user can easily distinguish the Doppler image DP in the blood flow period BT and the Doppler image DP in the non-blood flow period NBT among the displayed Doppler images DP.

  Moreover, the display control part 7 may display the Doppler image of a blood-flow period on the display part 10 as a display mode, and may make the Doppler image of a non-blood-flow period non-display. FIG. 4 is a schematic diagram showing the Doppler image DP displayed in this way. That is, the display control unit 7 displays the Doppler image DP of the blood flow period BT and does not display the Doppler image DP of the non-blood flow period NBT. Thereby, the user can easily visually recognize the Doppler image DP in the blood flow period.

  Further, the display control unit 7 may further display the Doppler image in the blood flow period and the Doppler image in the blood flow period subsequent to the blood flow period on the display unit 10. FIG. 5 is a schematic diagram showing the Doppler image DP displayed in this way. In FIG. 5, for the sake of explanation, one blood flow period is shown as a blood flow period BT1, and the other blood flow period is shown as a blood flow period BT2. In addition, the Doppler data for the blood flow period BT1 is acquired before the Doppler data for the blood flow period BT2. The display control unit 7 causes the display unit 10 to display a Doppler image by connecting the end time EP of the blood flow period BT1 and the start time SP of the blood flow period BT2. At this time, the display control unit 7 translates the Doppler image of each blood flow period in the time axis direction, and brings the display positions of the end time EP of the blood flow period BT1 and the start time SP of the blood flow period BT2 close to each other. Thus, the Doppler image of the blood flow period BT1 and the Doppler image of the blood flow period BT2 are connected and displayed on the display unit 10. Thereby, the user can visually recognize the Doppler image during the blood flow period more easily.

  The display control unit 7 may cause the display unit 10 to display the tomographic image of the tomographic image data corresponding to the blood flow period and the tomographic image of the tomographic image data corresponding to the non-blood flow period in different display modes. At this time, the display control unit 7 causes the display unit 10 to display a tomographic image of a frame corresponding to a predetermined time point in the Doppler image together with the Doppler image.

  At this time, the display control unit 7 receives designation of a predetermined time point in the Doppler image, and causes the display unit 10 to display a tomographic image of a frame corresponding to the time point. When the designated time point is included in the blood flow period, the display control unit 7 causes the display unit 10 to display a tomographic image of a frame corresponding to the time point. Further, when the designated time point is included in the non-blood flow period, the display control unit 7 causes the display unit 10 to display a tomographic image of a frame corresponding to the time point. At this time, the display control unit 7 displays the tomographic image corresponding to the time point included in the blood flow period and the tomographic image corresponding to the time point included in the non-blood flow period in different colors.

  The display control unit 7 displays the Doppler image in the blood flow period on the display unit 10 and hides the Doppler image in the non-blood flow period on the display unit 10. The tomographic image corresponding to the non-blood flow period may be hidden.

  Further, the display control unit 7 causes the display unit 10 to display the color mode image of the color mode image data corresponding to the blood flow period and the color mode image of the color mode image data corresponding to the non-blood flow period in different display modes. May be. At this time, the display control unit 7 causes the display unit 10 to display the color mode image of the frame corresponding to the predetermined time point in the Doppler image on the display unit 10 together with the tomographic image of the frame corresponding to the time point.

  At this time, the display control unit 7 receives designation of a predetermined time point in the Doppler image, and causes the display unit 10 to display a tomographic image and a color mode image of a frame corresponding to the time point. When the designated time point is included in the blood flow period, the display control unit 7 causes the display unit 10 to display a tomographic image and a color mode image of a frame corresponding to the time point. Further, when the designated time point is included in the non-blood flow period, the display control unit 7 causes the display unit 10 to display a tomographic image and a color mode image of a frame corresponding to the time point. At this time, the display control unit 7 uses different colors for the tomographic image and the color mode image corresponding to the time point included in the blood flow period and the tomographic image and the color mode image corresponding to the time point included in the non-blood flow period. To display.

  The display control unit 7 displays the Doppler image in the blood flow period on the display unit 10 and displays the tomographic image and the color mode image corresponding to the blood flow period when the Doppler image in the non-blood flow period is hidden. It may be displayed on the display unit 10 and the tomographic image and the color mode image corresponding to the non-blood flow period may be hidden.

[Operation]
FIG. 6 is a flowchart showing the operation of the ultrasonic diagnostic apparatus 1a of this embodiment.

(S001)
The ultrasonic diagnostic apparatus 1a performs ultrasonic Doppler inspection on a subject. At this time, the transmitter 3 supplies an electrical signal to the ultrasonic probe 2 to generate an ultrasonic wave. The ultrasonic probe 2 transmits ultrasonic waves to the subject and receives reflected waves from the subject. The ultrasonic probe 2 outputs a signal based on the received reflected wave to the receiving unit 4 as an echo signal. The receiving unit 4 receives the echo signal, and outputs a signal subjected to delay processing and phasing addition to the signal processing unit 5 as a received signal. The signal processing unit 5 receives the received signal and generates Doppler data. The signal processing unit 5 outputs the generated Doppler data to the image generation unit 6. The image generation unit 6 receives the Doppler data and generates Doppler image data. The image generation unit 6 outputs the generated Doppler image data to the display control unit 7. The display control unit 7 causes the display unit 10 to display a Doppler image based on the Doppler image data.

(S002)
When the ultrasonic diagnostic apparatus 1a receives a freeze instruction from the user, the process proceeds to step S003. When the ultrasonic diagnostic apparatus 1a has not received a freeze instruction from the user, the process returns to step S001.

(S003)
The trace unit 12 receives the Doppler data from the signal processing unit 5 and traces the maximum flow velocity point at each time point indicated in the received Doppler data in the time axis direction. The trace unit 12 adds the traced data to the Doppler data and outputs the data to the detection unit 13 as trace data.

(S004)
The detection unit 13 receives the trace data from the trace unit 12 and detects a feature point of the trace data. For example, the detection unit 13 obtains the first maximum point of the trace data as the feature point. Then, the detection unit 13 obtains, as a feature point, a local maximum point at which the size of the trace data is greater than or equal to a threshold value for the time after the feature point. The detection unit 13 calculates the time interval between the detected feature points. The detection unit 13 gives the detected feature point and the calculated time interval to the trace data, and outputs the trace data to the determination unit 15.

(S005)
The discriminating unit 15 discriminates a blood flow period that is a period representing the blood flow velocity and a non-blood flow period that is a period that does not represent the blood flow velocity among the time of the Doppler data included in the trace data.

(S006)
The display control unit 7 refers to the identification information for identifying the blood flow period and the non-blood flow period given to the Doppler image data, and displays different display modes for the Doppler image in the blood flow period and the Doppler image in the non-blood flow period. Is displayed on the display unit 10.

  Next, the operation of the determination unit 15 will be described with reference to FIG.

(S101)
The determination unit 15 receives the trace data to which the feature point and the time interval between the feature points are given from the detection unit 13 and reads the reference interval from the reference storage unit 14.

(S102)
The determination unit 15 compares the time interval of the feature points with the range indicated by the read reference interval.

(S103)
When the time interval of the feature points is within the range indicated by the reference interval, the process proceeds to step S104. When the time interval of the feature point is not within the range indicated by the reference interval, the process proceeds to step S105.

(S104)
When the time interval between feature points is within the range indicated by the reference interval, the determination unit 15 determines the time interval as a blood flow period.

(S105)
When the time interval between feature points is not within the range indicated by the reference interval, the determination unit 15 determines the time interval as a non-blood flow period.

(S106)
When the determination unit 15 has not determined all the time intervals, the process returns to step S102. When the determination unit 15 determines all time intervals, the determination unit 15 outputs identification information for identifying the blood flow period and the non-blood flow period to the display control unit 7.

[effect]
The effect of the ultrasonic diagnostic apparatus 1a of this embodiment will be described. The ultrasonic diagnostic apparatus 1a determines the blood flow period based on the time interval of the maximum flow velocity point of the Doppler data. Further, the Doppler image during the blood flow period and the Doppler image during the non-blood flow period are displayed on the display unit 10 in different display modes. Accordingly, it is possible to provide the ultrasonic diagnostic apparatus 1a that can extract partial data representing blood flow among data obtained by the ultrasonic Doppler examination.

<Modification>
[Constitution]
FIG. 8 is a block diagram illustrating a configuration of an ultrasonic diagnostic apparatus 1a according to a modification. The ultrasonic diagnostic apparatus 1 a further includes an electrocardiograph 16 and a reference interval setting unit 17. Hereinafter, a configuration different from the ultrasonic diagnostic apparatus 1a of the first embodiment will be described.

(Electrocardiograph 16)
The electrocardiograph 16 measures the electrocardiographic signal of the subject and calculates the heart rate of the subject. The electrocardiograph 16 outputs the calculated heart rate to the reference interval setting unit 17. The electrocardiograph 16 outputs the measured electrocardiogram signal to the image generation unit 6.

(Reference interval setting unit 17)
The reference interval setting unit 17 receives the heart rate from the electrocardiograph 16 and sets a reference interval. For example, the reference interval setting unit 17 converts the received heart rate into an electrocardiographic cycle, and sets a predetermined range based on the electrocardiographic cycle as a reference interval. The predetermined range is stored in advance in the reference time setting unit. The reference interval setting unit 17 stores the set reference interval in the reference storage unit 14.

(Image generation unit 6)
The image generation unit 6 receives an electrocardiogram signal from the electrocardiograph 16 and generates electrocardiogram image data representing the electrocardiogram. The electrocardiogram represented in the electrocardiographic image data represents a time change of the electrocardiographic signal of the subject as an electrocardiographic waveform. The image generation unit 6 outputs the generated electrocardiographic image data to the display control unit 7.

(Display control unit 7)
The display control unit 7 causes the display unit 10 to display an electrocardiogram based on the electrocardiographic image data from the image generation unit 6 together with the Doppler image. Further, when receiving a freeze instruction from the user, the display control unit 7 displays the electrocardiogram waveform in the blood flow period and the electrocardiogram in the non-blood flow period in different display modes based on the input from the determination unit 15. For example, the display control unit 7 displays the electrocardiogram during the blood flow period and the electrocardiogram during the non-blood flow period on the display unit 10 in different colors. Accordingly, the user can easily distinguish between the electrocardiogram during the blood flow period and the electrocardiogram during the non-blood flow period among the displayed electrocardiograms.

  Moreover, the display control part 7 may display the electrocardiogram of a blood-flow period on the display part 10 as a display mode, and may make the electrocardiogram of a non-blood-flow period non-display. That is, the display control unit 7 displays the electrocardiogram during the blood flow period and does not display the electrocardiogram during the non-blood flow period. Thereby, the user can easily visually recognize the electrocardiogram during the blood flow period.

  The display control unit 7 may further display the electrocardiogram during the blood flow period and the electrocardiogram during the blood flow period subsequent to the blood flow period on the display unit 10. For example, the display control unit 7 causes the display unit 10 to display an electrocardiogram by connecting the end time of the blood flow period acquired earlier and the start time of the blood flow period acquired later. At this time, the display control unit 7 translates the electrocardiogram of each blood flow period in the time axis direction, and displays the display position of the end time of the blood flow period acquired earlier and the start time of the blood flow period acquired later. By bringing them close to each other, the Doppler image during the blood flow period can be more easily visually recognized.

[Operation]
FIG. 9 is a flowchart showing the operation of the ultrasonic diagnostic apparatus 1a according to the modification.

(S201)
The electrocardiograph 16 measures the electrocardiographic signal of the subject and calculates the heart rate of the subject. The electrocardiograph 16 outputs the calculated heart rate to the reference interval setting unit 17. The electrocardiograph 16 outputs the measured electrocardiogram signal to the image generation unit 6.

(S202)
The reference interval setting unit 17 receives the heart rate from the electrocardiograph 16 and sets a reference interval. For example, the reference interval setting unit 17 converts the received heart rate into an electrocardiographic cycle, and sets a predetermined range based on the electrocardiographic cycle as a reference interval. The reference interval setting unit 17 stores the set reference interval in the reference storage unit 14.

(S203)
The ultrasonic diagnostic apparatus 1a performs ultrasonic Doppler inspection on a subject. At this time, the transmitter 3 supplies an electrical signal to the ultrasonic probe 2 to generate an ultrasonic wave. The ultrasonic probe 2 transmits ultrasonic waves to the subject and receives reflected waves from the subject. The ultrasonic probe 2 outputs a signal based on the received reflected wave to the receiving unit 4 as an echo signal. The receiving unit 4 receives the echo signal, and outputs a signal subjected to delay processing and phasing addition to the signal processing unit 5 as a received signal. The signal processing unit 5 receives the received signal and generates Doppler data. The signal processing unit 5 outputs the generated Doppler data to the image generation unit 6. The image generation unit 6 receives the Doppler data from the signal processing unit 5 and generates Doppler image data. The image generation unit 6 outputs the generated Doppler image data to the display control unit 7. The image generator 6 receives an electrocardiogram signal from the electrocardiograph 16 and generates electrocardiogram data. The image generation unit 6 outputs the generated electrocardiogram data to the display control unit 7. The display control unit 7 causes the display unit 10 to display a Doppler image based on the Doppler image data and an electrocardiogram based on the electrocardiogram data.

(S204)
When the ultrasonic diagnostic apparatus 1a receives a freeze instruction from the user, the process proceeds to step S205. When the ultrasonic diagnostic apparatus 1a does not receive a freeze instruction from the user, the process returns to step S203.

(S205)
The trace unit 12 receives the Doppler image data from the image generation unit 6 and traces the maximum flow velocity point for each time point of the received Doppler image data in the time direction. The trace unit 12 outputs the traced data to the detection unit 13 as trace data.

(S206)
The detection unit 13 receives the trace data from the trace unit 12 and detects feature points. For example, the detection unit 13 obtains the first maximum point of the trace data as the feature point. Then, the detection unit 13 obtains, as a feature point, a local maximum point at which the size of the trace data is greater than or equal to a threshold value for the time after the feature point. The detection unit 13 calculates the time interval between the detected feature points. The detection unit 13 gives the detected feature point and the calculated time interval to the trace data, and outputs the trace data to the determination unit 15.

(S207)
In the Doppler image, the determination unit 15 determines a blood flow period that is a period that represents the blood flow velocity and a non-blood flow period that is a period that does not represent the blood flow velocity, and proceeds to step S208. The content of the operation by the determination unit 15 at this time is the same as the flowchart of FIG.

(S208)
The display control unit 7 refers to the identification information for identifying the blood flow period and the non-blood flow period given to the Doppler image data, and displays different display modes for the Doppler image in the blood flow period and the Doppler image in the non-blood flow period. Is displayed on the display unit 10 and the electrocardiogram during the blood flow period and the electrocardiogram during the non-blood flow period are displayed on the display unit 10 in different display modes. The operation shown in the flowchart of FIG.

[effect]
The effect of the ultrasonic diagnostic apparatus 1a according to the modification will be described. The effect of the ultrasonic diagnostic apparatus 1a of this embodiment will be described. The ultrasonic diagnostic apparatus 1a determines the blood flow period based on the time interval of the maximum flow velocity point of the Doppler data. Further, the reference interval is automatically set by measuring the heart rate of the subject. Accordingly, it is possible to provide the ultrasonic diagnostic apparatus 1a that can extract partial data representing blood flow among data obtained by the ultrasonic Doppler examination.

<Second Embodiment>
[Constitution]
The ultrasonic diagnostic apparatus 1a according to this embodiment is different from the ultrasonic diagnostic apparatus 1a according to the first embodiment in the display mode of an image displayed on the display unit 10 by the display control unit 7. Other essential parts are the same as those in the first embodiment.

  The display control unit 7 receives the Doppler image based on the Doppler image data from the image generation unit 6 and the input from the determination unit 15, and receives the time interval from the start time of the blood flow period to the previous time point and the end time of the blood flow period A Doppler image of a period obtained by adding a surplus time, which is a time interval from time to time, to the blood flow period is displayed on the display unit 10 and other Doppler images are not displayed. FIG. 10 is a schematic diagram showing the Doppler image DP displayed in this way. For example, at this time, the display control unit 7 displays the Doppler image DP, the marker BK indicating the blood flow period, and the marker MK indicating the allowance time, and sets the allowance time in response to input from the user. At this time, the display control unit 7 may receive an input for individually setting a margin range for each blood flow period, or may receive an input for setting a margin time common to all blood flow periods. Good. Moreover, the display control part 7 may memorize | store margin time beforehand, and may display the doppler image DP on the display part 10 based on the memorize | stored margin time. The display control unit 7 displays the Doppler image DP of the period EBT in which the margin time ET is added to the blood flow period BT on the display unit 10 and hides other Doppler images DP. Thereby, the user can easily visually recognize the Doppler image DP in the blood flow period and the Doppler images DP before and after the Doppler image DP.

  Further, the display control unit 7 further causes the display unit 10 to display the Doppler image obtained by adding the extra time to the blood flow period and the Doppler image of the next blood flow period and extra time after the blood flow period. May be. FIG. 11 is a schematic diagram showing the Doppler image displayed in this way. In FIG. 11, for the sake of explanation, one blood flow period is shown as a blood flow period BT1, and the other blood flow period is shown as a blood flow period BT2. In addition, the Doppler data for the blood flow period BT1 is acquired before the Doppler data for the blood flow period BT2. The display control unit 7 causes the display unit 10 to display a Doppler image in which the end time EEP of the surplus time ET1 for the blood flow period BT1 and the start time ESP of the surplus time ET2 for the blood flow period BT2 are connected. At this time, the display control unit 7 translates each Doppler image in the period in which the extra time is added to the blood flow period in the time axis direction, and displays the end time EEP of the extra time ET1 and the start time ESP of the extra time ET2. By bringing the positions close to each other, the Doppler image obtained by adding the extra time ET1 to the blood flow period BT1 and the Doppler image obtained by adding the extra time ET2 to the blood flow period BT2 are connected and displayed on the display unit 10. Thereby, the user can easily visually recognize the Doppler images in the blood flow period and the Doppler images before and after that.

  Further, the display control unit 7 may cause the display unit 10 to display the tomographic image of the tomographic image data corresponding to the period obtained by adding the extra time to the blood flow period and the tomographic image of the other tomographic image data in different display modes. Good. At this time, the display control unit 7 causes the display unit 10 to display a tomographic image of a frame corresponding to a predetermined time point in the Doppler image together with the Doppler image.

  At this time, the display control unit 7 receives designation of a predetermined time point in the Doppler image, and causes the display unit 10 to display a tomographic image of a frame corresponding to the time point. When the designated time point is included in the period obtained by adding the extra time to the blood flow period, the display control unit 7 causes the display unit 10 to display a tomographic image of a frame corresponding to the time point. Further, when the designated time point is included in another period, the display control unit 7 causes the display unit 10 to display a tomographic image of a frame corresponding to the time point. At this time, the display control unit 7 displays a tomographic image corresponding to a time point included in a period obtained by adding a margin time to the blood flow period, and displays a tomographic image corresponding to a time point included in another period. And each tomographic image is displayed in a different color.

  The display control unit 7 causes the display unit 10 to display a Doppler image in a period in which the extra time is added to the blood flow period, and hides the Doppler image in other periods in the blood flow period. The tomographic image corresponding to the added period may be displayed on the display unit 10 and the tomographic images corresponding to other periods may be hidden.

  Further, the display control unit 7 displays the color mode image of the color mode image data corresponding to the period obtained by adding the extra time to the blood flow period and the color mode image of the other color mode image data on the display unit 10 in different display modes. It may be displayed. At this time, the display control unit 7 may superimpose a color mode image of a frame corresponding to a predetermined time point in the Doppler image on the tomographic image of a frame corresponding to the time point and display the color mode image on the display unit 10 together with the Doppler image.

  In this way, the display control unit 7 receives the designation of a predetermined time point in the Doppler image, and causes the display unit 10 to display the tomographic image and the color mode image of the frame corresponding to the time point. When the designated time point is included in a period in which a margin time is added to the blood flow period, the display control unit 7 causes the display unit 10 to display a tomographic image and a color mode image of a frame corresponding to the time point. In addition, when the designated time point is included in another period, the display control unit 7 causes the display unit 10 to display a tomographic image and a color mode image of a frame corresponding to the time point. At this time, the display control unit 7 displays the tomographic image and the color mode image corresponding to the time included in the period obtained by adding the extra time to the blood flow period, and the tomographic image corresponding to the time included in the other period. The tomographic image and the color mode image are displayed in different colors depending on when the color mode image is displayed.

  The display control unit 7 corresponds to the blood flow period when the Doppler image in the period in which the extra time is added to the blood flow period is displayed on the display unit 10 and the Doppler image in the non-blood flow period is not displayed. The tomographic image and the color mode image may be displayed on the display unit 10 and the tomographic image and the color mode image corresponding to other periods may be hidden.

[Operation]
FIG. 12 is a flowchart showing the operation of the ultrasonic diagnostic apparatus 1a of this embodiment.

(S301)
The ultrasonic diagnostic apparatus 1a performs ultrasonic Doppler inspection on a subject. At this time, the transmitter 3 supplies an electrical signal to the ultrasonic probe 2 to generate an ultrasonic wave. The ultrasonic probe 2 outputs a signal based on the received reflected wave to the receiving unit 4 as an echo signal. The signal processing unit 5 receives the received signal and generates Doppler data. The signal processing unit 5 outputs the generated Doppler data to the image generation unit 6. The image generation unit 6 outputs the generated Doppler image data to the display control unit 7. The display control unit 7 causes the display unit 10 to display a Doppler image based on the Doppler image data.

(S302)
When the ultrasonic diagnostic apparatus 1a receives a freeze instruction from the user, the process proceeds to step S303. When the ultrasonic diagnostic apparatus 1a does not receive a freeze instruction from the user, the process returns to step S301.

(S303)
The trace unit 12 receives the Doppler image data from the image generation unit 6 and traces the maximum flow velocity point for each time point of the received Doppler image data in the time axis direction. The trace unit 12 outputs the traced data to the detection unit 13 as trace data.

(S304)
The detection unit 13 receives the trace data from the trace unit 12 and detects feature points. For example, the detection unit 13 obtains the first maximum point of the trace data as the feature point. Then, the detection unit 13 obtains, as a feature point, a local maximum point at which the size of the trace data is greater than or equal to a threshold value for the time after the feature point. The detection unit 13 calculates the time interval between the detected feature points. The detection unit 13 gives the detected feature point and the calculated time interval to the trace data, and outputs the trace data to the determination unit 15.

(S305)
In the Doppler image, the determination unit 15 determines a blood flow period that is a period that represents the blood flow velocity and a non-blood flow period that is a period that does not represent the blood flow velocity, and proceeds to step S306. The contents of the operation by the determination unit 15 at this time are the same as those in the flowchart of FIG.

(S306)
The display control unit 7 receives input from the user and sets a time interval from the start point of the blood flow period to the front and a margin time that is a time interval from the end point of the blood flow period to the back.

(S307)
The display control unit 7 causes the display unit 10 to display a Doppler image in a period obtained by adding a margin time to the blood flow period and a Doppler image in another period in different display modes. This completes the operation shown in FIG.

[effect]
The effect of the ultrasonic diagnostic apparatus 1a of this embodiment will be described. The ultrasonic diagnostic apparatus 1a determines the blood flow period based on the time interval of the maximum flow velocity point of the Doppler data. Furthermore, the display unit 10 displays the Doppler image of the period in which the extra time is added to the blood flow period and the Doppler image of the other period in different display modes. Thereby, it is possible to provide the ultrasonic diagnostic apparatus 1a that can extract partial data representing blood flow and partial data before and after the blood data from the data obtained by the ultrasonic Doppler examination.

<Third Embodiment>
[Constitution]
FIG. 13 is a block diagram showing the configuration of the medical image processing apparatus 1b of this embodiment. The medical image processing apparatus 1b includes an image storage unit 18, a reading unit 19, a calculation unit 11, a determination unit 15, a display control unit 7, a system control unit 8, a display unit 10, and an operation unit 9. . Hereinafter, a configuration different from the ultrasound diagnostic apparatus 1a will be described.

(Image storage unit 18)
The image storage unit 18 stores in advance the Doppler image data of the subject obtained by the ultrasonic Doppler examination. The image storage unit 18 may store in advance the tomographic image data of the subject. Further, the image storage unit 18 may store color mode image data of the subject in advance.

(Reading unit 19)
The reading unit 19 reads the Doppler image data from the image storage unit 18 and outputs the read Doppler image data to the tracing unit 12 and the display control unit 7. The reading unit 19 may read the tomographic image data from the image storage unit 18 and output the read tomographic image data to the display control unit 7. Further, the reading unit 19 may read the color mode image data from the image storage unit 18 and output it to the display control unit 7.

(Trace part 12)
The tracing unit 12 receives the Doppler image data from the reading unit 19 and traces the maximum flow velocity point at each time point indicated in the Doppler image data in the time axis direction. The trace unit 12 adds the traced data to the Doppler image data and outputs the data to the detection unit 13 as trace data.

(Detection unit 13, reference storage unit 14, discrimination unit 15)
The configuration of the detection unit 13, the reference storage unit 14, and the determination unit 15 may be the configuration of the detection unit 13 of the ultrasonic diagnostic apparatus 1a according to the first embodiment.

(Display control unit 7)
The display control unit 7 receives the Doppler image data from the reading unit 19 and the input from the determination unit 15, refers to the identification information of the blood flow period and the non-blood flow period for the Doppler image data, and The Doppler image and the Doppler image of the non-blood flow period are displayed on the display unit 10 in different display modes.

  The display control unit 7 may further receive the tomographic image data from the reading unit 19 and display the tomographic image corresponding to the blood flow period and the tomographic image corresponding to the non-blood flow period in different display modes. The display mode by the ultrasonic diagnostic apparatus 1a according to the first embodiment may be used for this display mode.

  Further, the display control unit 7 further receives the color mode image data from the reading unit 19, and makes the tomographic image and color mode image corresponding to the blood flow period different from the tomographic image and color mode image corresponding to the non-blood flow period. You may display in a display mode. The display mode by the ultrasonic diagnostic apparatus 1a according to the first embodiment may be used for this display mode.

[Operation]
FIG. 14 is a flowchart showing the operation of the medical image processing apparatus 1b of this embodiment.

(S401)
The reading unit 19 reads the Doppler image data from the image storage unit 18 and outputs the read Doppler image data to the tracing unit 12 and the display control unit 7.

(S402)
The trace unit 12 receives the Doppler image data from the image generation unit 6 and traces the maximum flow velocity point for each time point of the received Doppler image data in the time axis direction. The trace unit 12 outputs the traced data to the detection unit 13 as trace data.

(S403)
The detection unit 13 receives the trace data from the trace unit 12 and detects feature points. For example, the detection unit 13 obtains the first maximum point of the trace data as the feature point. Then, the detection unit 13 obtains, as a feature point, a local maximum point at which the size of the trace data is greater than or equal to a threshold value for the time after the feature point. The detection unit 13 calculates the time interval between the detected feature points. The detection unit 13 gives the detected feature point and the calculated time interval to the trace data, and outputs the trace data to the determination unit 15.

(S404)
In the Doppler image, the determination unit 15 determines a blood flow period that is a period that represents the blood flow velocity and a non-blood flow period that is a period that does not represent the blood flow velocity, and proceeds to step S404. The contents of the operation by the determination unit 15 at this time are the same as those in the flowchart of FIG.

(S405)
The display control unit 7 refers to the identification information for identifying the blood flow period and the non-blood flow period given to the Doppler image data, and displays different display modes for the Doppler image in the blood flow period and the Doppler image in the non-blood flow period. Is displayed on the display unit 10. This completes the operation shown in the flowchart of FIG.

[effect]
The effect of the medical image processing apparatus 1b of this embodiment will be described. The medical image processing apparatus 1b determines the blood flow period based on the time interval of the maximum flow velocity point of the Doppler data. Further, the Doppler image during the blood flow period and the Doppler image during the non-blood flow period are displayed on the display unit 10 in different display modes. Thereby, it is possible to provide a medical image processing apparatus 1b that can extract partial data representing blood flow from data obtained by ultrasonic Doppler examination.

  An ultrasonic image processing program for realizing the above-described embodiments can be stored in any recording medium readable by a computer. As this recording medium, for example, a semiconductor memory, an optical disk, a magneto-optical disk, a magnetic storage medium, or the like can be used. It is also possible to transmit / receive this program through a network such as the Internet or a LAN.

<Effects common to the embodiments>
According to the ultrasonic diagnostic apparatus, medical image processing apparatus, or medical image processing program of at least one embodiment described above, the ultrasonic wave is determined by determining the blood flow period based on the time interval of the maximum flow velocity point of Doppler data. Of the data obtained by Doppler examination, partial data representing blood flow can be extracted.

  Although the embodiment of the present invention has been described, the above-described embodiment has been presented as an example, and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1a Ultrasonic diagnostic apparatus 1b Medical image processing apparatus 2 Ultrasonic probe 3 Transmission part 4 Receiving part 5 Signal processing part 50 Doppler processing part 51 Tomographic image processing part 52 Color mode processing part 6 Image generation part 7 Display control part 8 System control part DESCRIPTION OF SYMBOLS 9 Operation part 10 Display part 11 Calculation part 12 Trace part 13 Detection part 14 Reference | standard memory | storage part 15 Discriminating part 16 Electrocardiograph 17 Reference | standard interval setting part 18 Image storage part 19 Reading part

Claims (15)

A transmitter that transmits ultrasonic waves from the ultrasonic probe to the subject;
A receiving unit that receives a reflected wave from the subject and outputs a reception signal based on the received reflected wave;
Based on the received signal, a Doppler processing unit for obtaining Doppler data representing a temporal change in the blood flow velocity of the subject;
Detecting a feature point of the obtained Doppler image data, and calculating a time interval of the feature point;
A reference storage unit for storing a predetermined reference interval in advance;
Based on the time interval and the reference interval, among the time of the Doppler image data, a blood flow period that is a period that represents the blood flow velocity and a non-blood flow period that is a period that does not represent the blood flow velocity; An ultrasonic diagnostic apparatus comprising: a discrimination unit that discriminates. 2. The ultrasonic diagnostic apparatus according to claim 1, wherein the calculation unit obtains a maximum point where the size of the Doppler image data is greater than or equal to a threshold value as the feature point, and calculates a time interval of the maximum point. . The reference interval is shown in a predetermined range,
The discriminating unit compares the time interval with the range, discriminates a period of the Doppler image data in which the time interval is within the range as the blood flow period, and the time interval is within the range. The ultrasonic diagnostic apparatus according to claim 1, wherein a period not within is determined as the non-blood flow period.   In response to the Doppler image data by the Doppler processing unit and the input from the determination unit, the Doppler image data in the blood flow period and the Doppler image data in the non-blood flow period are displayed on the display unit in different display modes. The ultrasonic diagnostic apparatus according to claim 1, further comprising a display control unit to be operated.   The display control unit, as the display mode, displays the Doppler image data in the blood flow period and the Doppler image data in the non-blood flow period on the display unit in different colors. 4. The ultrasonic diagnostic apparatus according to 4.   The display control unit, as the display mode, displays the Doppler image data of the blood flow period on the display unit, and hides the Doppler image data of the non-blood flow period. 4. The ultrasonic diagnostic apparatus according to 4.   The display control unit further displays the Doppler image data of the blood flow period and the Doppler image data of the blood flow period subsequent to the blood flow period on the display unit. The ultrasonic diagnostic apparatus according to claim 6.   The display control unit receives the Doppler image data from the Doppler processing unit and an input from the determination unit, and receives a time interval from the start time of the blood flow period to the front and a time point from the end of the blood flow period to the back. The Doppler image data of a period obtained by adding a margin time including the time interval to the blood flow period is displayed on the display unit, and the other Doppler image data is not displayed. 5. The ultrasonic diagnostic apparatus according to 5.   The display control unit further connects the Doppler image data in a period obtained by adding the margin time to the blood flow period, and the Doppler image data in the blood flow period next to the blood flow period and the margin time. The ultrasonic diagnostic apparatus according to claim 8, wherein the ultrasonic diagnostic apparatus is displayed on the display unit. Further comprising a tomographic image processing unit for obtaining tomographic image data of the subject based on the received signal;
The display control unit further receives the tomographic image data from the tomographic image processing unit, and obtains a tomographic image of tomographic image data corresponding to the blood flow period and a tomographic image of tomographic image data corresponding to the non-blood flow period. It displays on the said display part with a different display mode. The ultrasonic diagnostic apparatus as described in any one of Claims 4-7 characterized by the above-mentioned. A color mode processing unit for obtaining color mode image data representing blood flow information of the subject to be superimposed on the tomographic image based on the received signal;
The display control unit further receives the color mode image data from the color mode processing unit, and outputs color mode image data corresponding to the blood flow period and color mode image data corresponding to the non-blood flow period. The ultrasonic diagnostic apparatus according to claim 10, wherein a color mode image is displayed on the display unit in a different display mode. Further comprising a tomographic image processing unit for obtaining tomographic image data of the subject based on the received signal;
The display control unit further receives the tomographic image data from the tomographic image processing unit, and corresponds to a period obtained by adding the margin time to the blood flow period and a tomographic image of the tomographic image data and other tomographic image data The ultrasonic diagnostic apparatus according to claim 8 or 9, wherein an image is displayed on the display unit in a different display mode. A color mode processing unit for obtaining color mode image data representing blood flow information of the subject to be superimposed on the tomographic image based on the received signal;
The display control unit further receives the color mode image data from the color mode processing unit, and a color mode image of color mode image data corresponding to a period obtained by adding the margin time to the blood flow period and other color mode images. The ultrasonic diagnostic apparatus according to claim 12, wherein a data color mode image is displayed on the display unit in a different display mode. An image storage unit that stores in advance the Doppler image data of the subject obtained by the ultrasonic Doppler examination;
A readout unit that reads out Doppler image data from the image storage unit and outputs the read out Doppler image data;
A calculation unit that detects a feature point of the Doppler image data from the reading unit and calculates a time interval of the feature point;
A reference storage unit for storing a predetermined reference interval in advance;
Based on the time interval and the reference interval, among the time of the Doppler image data, a blood flow period that is a period that represents a blood flow velocity and a non-blood flow period that is a period that does not represent the blood flow velocity. A medical image processing apparatus comprising: a determination unit that performs determination. In a computer that processes Doppler image data of a subject obtained by ultrasonic Doppler examination,
Memorize the set reference interval,
Based on a received signal based on a reflected wave from the subject, Doppler image data including a temporal change in blood flow velocity of the subject is obtained,
The feature point of the obtained Doppler image data is detected,
Calculating the time interval of the feature points;
Based on the time interval and the reference interval, among the time of the Doppler image data, a blood flow period that is a period that represents the blood flow velocity and a non-blood flow period that is a period that does not represent the blood flow velocity; A medical image processing program characterized by the above.

Images