JP2010068978A - X-ray image diagnosis apparatus - Google Patents

Abstract

An X-ray diagnostic imaging apparatus capable of reducing radiation damage of a subject is provided.
An operation unit capable of inputting examination information for examining a subject P, an X-ray irradiation unit 10 for irradiating the subject P with X-rays, and an X transmitted through the subject P An X-ray detection unit 30 that detects a line and generates X-ray projection data; an image data generation unit 50 that processes the X-ray projection data generated by the X-ray detection unit 30 to generate image data; An exposure information creation unit 60 that creates P exposure information and a display unit 70 that displays the image data generated by the image data generation unit 50, and the exposure information creation unit 60 includes an examination input from the operation unit 80. Based on the information, the exposure information of the subject P corresponding to the image data generated by the image data generation unit 50 is generated, and the display unit 70 generates the image data and exposure information generation unit 60 generated by the image data generation unit 50. Exposure information created by To display.
[Selection] Figure 1

Description

  The present invention relates to an X-ray image diagnostic apparatus, and more particularly to an X-ray image diagnostic apparatus that outputs exposure information of a subject to be irradiated with X-rays.

  In recent years, X-ray diagnostic imaging apparatuses have made progress mainly in the cardiovascular field with the development of angiographic examinations using catheters and IVR (Interventional Radiology). This X-ray diagnostic imaging apparatus is intended for the entire arteries and veins including the cardiovascular system, performs X-ray fluoroscopy and imaging in a state where a contrast medium is injected into the blood vessel, and displays the blood vessel displayed on the display unit. Diagnosis and treatment are performed by interpreting image data.

However, for example, in the examination by IVR, X-ray fluoroscopy is performed for a long time on the subject, and therefore skin damage such as burns occurs due to excessive radiation exposure. In order to solve this problem, the skin dose of the subject is obtained, and when the obtained skin dose reaches a preset value, an X-ray tube that emits X-rays and X-rays from the X-ray tube are detected. An X-ray diagnostic imaging apparatus is known in which an arm supporting an X-ray detector is driven to reverse the X-ray irradiation direction to prevent the skin dose of the subject from becoming excessive (for example, , See Patent Document 1).
JP 2007-89923 A

  However, when the skin dose reaches a preset value, it is necessary to interrupt the test and drive the arm. Therefore, if the test cannot be interrupted, skin damage can be avoided by excessive exposure. There is a problem that cannot be done.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an X-ray diagnostic imaging apparatus that can reduce skin disorders of a subject.

  In order to solve the above problem, an X-ray image diagnostic apparatus of the present invention is based on an operation means capable of inputting examination information for examining a subject, and examination information input from the operation means. X-ray irradiation means for irradiating the subject with X-rays, and X-ray detection means for generating X-ray projection data by detecting X-rays irradiated by the X-ray irradiation means and transmitted through the subject. The image data generating unit generates image data by processing the X-ray projection data generated by the X-ray detecting unit, and the image data generating unit generates the image data based on the examination information input from the operating unit. Exposure information creation means for creating exposure information of the subject corresponding to the image data, image data generated by the image data generation means, and exposure information created by the exposure information creation means Characterized by comprising a display unit that.

  According to the present invention, by displaying the exposure information of the subject with respect to the image data together with the image data on the display unit, it becomes easy to grasp the exposure information during the examination, and it is possible to reduce the skin disorder of the subject. .

  Examples of the present invention will be described.

  Embodiments of an X-ray image diagnostic apparatus according to the present invention will be described below with reference to FIGS.

  FIG. 1 is a block diagram showing a configuration of an X-ray image diagnostic apparatus according to an embodiment of the present invention. The X-ray diagnostic imaging apparatus 100 generates an X-ray irradiation unit 10 that irradiates a subject P placed on the top board 7 with X-rays and a high voltage necessary for the X-ray irradiation of the X-ray irradiation unit 10. And an X-ray detection unit 30 that detects X-rays transmitted through the subject P by X-ray irradiation of the X-ray irradiation unit 10 and generates X-ray projection data.

  The X-ray diagnostic imaging apparatus 100 moves the arm 8 that holds the X-ray irradiation unit 10 and the X-ray detection unit 30 that is disposed to face the X-ray irradiation unit 10, and the top plate 7 and the arm 8. Based on the information on the X-rays emitted from the mechanism unit 40, the image data generation unit 50 that processes the X-ray projection data generated by the X-ray detection unit 30 and generates image data, and the X-ray irradiation unit 10. And an exposure information creation unit 60 for creating exposure information of the subject P.

  Furthermore, the X-ray diagnostic imaging apparatus 100 includes a display unit 70 that displays image data generated by the image data generation unit 50 and exposure information generated by the exposure information generation unit 60, and a name and height for identifying the subject P. And an operation unit 80 for inputting examination information for examining the subject P, such as subject information including body weight, imaging region, fluoroscopic conditions, imaging conditions, and the like, and controlling these units as a whole And a system control unit 90.

  The X-ray irradiation unit 10 is arranged between the X-ray tube 11 that generates X-rays and the X-ray tube 11 that is disposed between the X-ray tube 11 and the subject P and limits the range of X-rays that are irradiated to the subject P. And. The X-ray tube 11 generates X-rays for fluoroscopy with the high voltage supplied from the high voltage generator 20 based on the fluoroscopic conditions supplied from the system controller 90. In addition, the frame rate is determined during the imaging irradiation time by one shot of X-rays for generating one frame of image data by a high voltage supplied from the high voltage generator 20 based on the imaging conditions, or by a high voltage of a plurality of pulses. X-rays for generating image data of the number of frames multiplied by.

  Further, the X-ray diaphragm 12 is used for fluoroscopy and radiography from the X-ray tube 11 that irradiates the subject P based on the information on the irradiation field included in the fluoroscopy conditions and radiographing conditions supplied from the system control unit 90. Limit the range of X-rays.

  The high voltage generation unit 20 is configured to transmit a fluoroscopic irradiation condition such as a tube voltage and a tube current included in the fluoroscopic condition supplied from the system control unit 90, a tube voltage, a tube current, a frame rate, and an X-ray irradiation time included in the imaging condition. The X-ray tube 11 of the X-ray irradiation unit 10 is supplied with a high voltage for causing the X-ray tube 11 of the X-ray irradiation unit 10 to generate fluoroscopic X-rays and X-rays for imaging.

  The X-ray detection unit 30 processes an X-ray detector 31 that detects X-rays irradiated from the X-ray diaphragm 12 of the X-ray irradiation unit 10 and transmitted through the subject P, and a signal from the X-ray detector 31. And a signal processing unit 32 for generating X-ray projection data.

  The X-ray detector 31 includes, for example, a detection element that converts incident X-rays into electric charge, a gate driver that supplies a drive pulse for reading to the detection element, an amplifier that converts electric charge accumulated in the detection element into voltage, and an amplifier A multiplexer that selects a signal output from the A / D converter, an A / D converter that converts an analog signal from the multiplexer into a digital signal, and the like. In addition, a moving mechanism that can move the position back and forth with respect to the X-ray tube 11 of the X-ray irradiation unit 10 is provided, and the distance (SID) from the X-ray tube 11 can be adjusted. In addition, it has an X-ray detection surface on which X-rays transmitted through the subject P are incident, and an X-ray input field size (FOV) on the X-ray detection surface can be adjusted.

  An image intensifier that detects X-rays that have passed through the subject P and converts them into light, a television camera that captures light from the image intensifier and converts it into an electrical signal, and electricity from the television camera You may implement so that X-ray projection data may be produced | generated using the A / D converter which converts a signal into a digital signal.

  The mechanism unit 40 includes a top plate moving mechanism 41 that moves the top plate 7 on which the subject P is placed in the longitudinal direction, the width direction, and the vertical direction, and an arm rotation that rotates the arm 8 around the subject P. And a mechanism control unit 43 that controls the top plate moving mechanism 41 and the arm turning mechanism 42.

  The top board moving mechanism 41 moves the top board 7 on which the subject P is placed to an imaging position where X-ray fluoroscopy and X-ray imaging of the imaging part of the subject P can be performed. Further, the arm moving mechanism 42 rotates the arm 8 to an angle at which X-ray fluoroscopy and X-ray imaging of the imaging part of the subject P on the top 7 can be performed.

  The image data generation unit 50 processes the X-ray projection data generated by the signal processing unit 32 of the X-ray detection unit 30 to generate image data such as fluoroscopic image data and captured image data, and stores the generated image data And output to the display unit 70.

  The exposure information creation unit 60 includes subject information supplied from the system control unit 90, fluoroscopic irradiation conditions, X-ray fluoroscopy time, imaging irradiation conditions and the number of imaging operations, irradiation field, position of the top board 7, and angle of the arm 8. The exposure information of the subject P corresponding to the image data generated by the image data generation unit 50 is created based on the examination information such as the imaging region and SID, and the created exposure information is output to the display unit 70.

  Then, exposure information is created in accordance with an operation for starting X-ray fluoroscopy, an operation for stopping X-ray fluoroscopy, an operation for X-ray imaging, and an operation for ending the test after an operation for starting the test is performed from the operation unit 80. . Further, for example, the position of the top plate 7, the angle of the arm 8, the SID, the FOV, the image magnification, the irradiation field, the fluoroscopic irradiation condition, the imaging irradiation condition, etc. accompanied by the change of the X-ray irradiation area or irradiation dose to the subject P The exposure information is created in accordance with the operation for changing the fluoroscopy conditions and the imaging conditions.

  Here, the X-ray irradiation region irradiated to the subject P from the cumulative X-ray dose irradiated to the subject P from the start of the examination operation to the generation of the image data by the image data generation unit 50 The cumulative skin dose in the maximum region where the cumulative skin dose is maximum is calculated. Next, gauge data representing the ratio of the calculated cumulative skin dose to a preset warning dose at risk of developing a skin disorder such as a burn is created.

  In addition, the X-ray irradiated to the subject P from the start of the operation to the start of the operation in accordance with the operation of stopping fluoroscopy, the operation of X-ray imaging, and the operation of ending the inspection. Of the irradiation regions, region data representing the irradiation region excluding the irradiation region corresponding to the region of the last image data generated by the image data generation unit 50 when the operation is performed is created. In addition, a rotatable three-dimensional 3D model (or a two-dimensional 2D model) in which the subject P including the imaging part is modeled based on the information on the imaging part supplied from the system control unit 90 is created. 3D region data (or 2D) for representing on the surface of the 3D model (or 2D model) an X-ray irradiation region irradiated on the subject P from the start of the examination of the subject P to when the operation is performed. After the area data) is created, an area data display 3D model (or area data 2D model) is created by superimposing the created 3D area data (or 2D area data) on the surface of the 3D model (or 2D model). Further, it corresponds to the last image data area when the operation is performed, among the X-ray irradiation areas irradiated on the subject P after the operation for starting the examination is performed. Maximum area data representing an irradiation area in which the integrated skin dose of the irradiation area is maximum is created. Further, it corresponds to the last image data area when the operation is performed, among the X-ray irradiation areas irradiated on the subject P after the operation for starting the examination is performed. Warning area data representing an irradiation area in which the integrated skin dose of the irradiation area is equal to or greater than the warning dose is created.

  Furthermore, the exposure of the subject P that predicts the subsequent operation according to the change operation of the examination information including the change of the X-ray irradiation area or the X-ray dose irradiated to the subject P after the examination start operation is performed. Create a graph that is information.

  Here, the fluoroscopic X-ray irradiation time changed in accordance with the change in the examination information, the fluoroscopic X-ray irradiation time changed in accordance with the change in the examination information, and the examination of the subject P are started. Thereafter, a perspective graph is created that represents the relationship with the cumulative skin dose calculated from the cumulative X-ray dose irradiated to the irradiation region of the subject P corresponding to the region of interest designated on the image data from the operation unit 80.

  Further, the number of times of imaging with the imaging X-ray changed according to the change of the examination information, and the examination of the subject P corresponding to the region of interest designated on the image data from the operation unit 80 after the examination of the subject P is started. An imaging graph representing the relationship with the cumulative skin dose calculated from the cumulative X-ray dose irradiated to the irradiation region is created.

  The display unit 70 combines the image data generated by the image data generation unit 50 and the exposure information generated by the exposure information generation unit 60, and combines the image data combined with the exposure information by the combination unit 71. A first monitor 72 for displaying data and a second monitor 73 adjacent to the first monitor 72 are provided.

  The synthesizer 71 outputs the image data generated by the image data generator 50 to the first monitor 72. Further, the image data generated by the image data generation unit 50 and the gauge data generated by the exposure information generation unit 60 corresponding to the image data are combined, and the combined first combined data is output to the first monitor 72. To do.

  The combining unit 71 outputs the region data 2D model and the region data 3D model created by the exposure information creating unit 60 to the second monitor 73. Also, the image data generated by the image data generation unit 50 and the exposure information such as the area data, the maximum area data, the warning area data, and the graph generated by the exposure information generation unit 60 corresponding to the image data are combined and combined. The second synthesized data is output to the second monitor 73.

  Here, the image data generated by the image data generation unit 50 and the area data generated by the exposure information generation unit 60 are combined. Further, the image data generated by the image data generation unit 50 and the maximum area data generated by the exposure information generation unit 60 are combined. Further, the image data generated by the image data generation unit 50 and the graph generated by the exposure information generation unit 60 corresponding to the region of interest specified on the image data are synthesized. Further, the image data generated by the image data generation unit 50, the maximum area data generated by the exposure information generation unit 60, and a graph corresponding to the maximum area data are synthesized. Further, the image data generated by the image data generation unit 50 and the warning area data generated by the exposure information generation unit 60 are combined.

  The first monitor 72 is provided mainly for displaying the image data generated by the image data generating unit 50, and displays the image data output from the combining unit 71 and the first combined data. The second monitor 73 is provided mainly for displaying the exposure information created by the exposure information creation unit 60, and the second synthesized data, area data 2D model, and area data 3D output from the synthesis unit 71. Display the model.

  The operation unit 80 is an interactive interface including an input device such as a keyboard, a trackball, a joystick, and a mouse, a display panel, and various switches. The operation unit 80 is used to input fluoroscopy conditions and imaging conditions included in inspection information. The operation of moving the top board 7 and the arm 8, the operation of starting the inspection for starting the inspection, the operation of ending the inspection for ending the inspection, the operation for starting the X-ray fluoroscopy for starting the X-ray fluoroscopy, and the X for stopping the X-ray fluoroscopy An operation of stopping fluoroscopy, an operation of X-ray imaging for performing X-ray imaging, and the like are performed.

  The system control unit 90 includes a CPU and a storage circuit, temporarily stores input information supplied from the operation unit 80, and then based on the input information, the X-ray irradiation unit 10, the high voltage generation unit 20, and the X-ray detection The unit 30, the mechanism unit 40, the image data generation unit 50, the exposure information creation unit 60, and the display unit 70 are controlled and the entire system is controlled.

  Hereinafter, an example of the operation of the X-ray image diagnostic apparatus 100 will be described with reference to FIGS. 1 to 11. FIG. 2 is a flowchart showing the operation of the X-ray image diagnostic apparatus 100. FIG. 3 is a diagram illustrating an example of the first combined data displayed on the screen of the first monitor 72. FIG. 4 is a diagram illustrating another example of gauge data included in the first composite data. FIG. 5 is a diagram illustrating an example of second synthesized data including area data displayed on the screen of the second monitor 73. FIG. 6 is a diagram illustrating another example of the second combined data including the area data displayed on the screen of the second monitor 73.

  FIG. 7 is a diagram illustrating an example of the area data 3D model displayed on the screen of the second monitor 73. FIG. 8 is a diagram illustrating an example of the second combined data including the maximum area data and the perspective graph displayed on the screen of the second monitor 73. FIG. 9 is a diagram showing details of the perspective graph shown in FIG. FIG. 10 is a diagram showing details of the photographing graph. FIG. 11 is a diagram illustrating an example of second combined data including warning area data displayed on the screen of the second monitor 73.

  In FIG. 2, when an examination start operation is performed by inputting examination information of the subject P, the X-ray image diagnostic apparatus 100 starts an operation (step S1).

  When the operation unit 80 for moving the imaging part of the subject P placed on the top plate 7 to the imaging position is performed, the top plate moving mechanism 41 is controlled by the mechanism control unit 43 of the mechanism unit 40. The arm rotation mechanism 42 rotates the arm 8. Then, the imaging part of the subject P is set as the imaging position.

  Next, for example, when an operation for starting X-ray fluoroscopy is performed from the operation unit 80, the system control unit 90 causes the X-ray irradiation unit 10, the high voltage generation unit 20, the X-ray detection unit 30, the mechanism unit 40, and the image data generation unit. 50, the exposure information creation unit 60 and the display unit 70 are instructed to perform fluoroscopy. The high voltage generation unit 20 supplies a high voltage for fluoroscopy to the X-ray tube 11 of the X-ray irradiation unit 10. The X-ray tube 11 generates X-rays for fluoroscopy according to the high voltage supplied from the high voltage generator 20. The X-ray diaphragm 12 irradiates the subject P with X-rays from the X-ray tube 11 restricted based on the information of the first irradiation field supplied from the system control unit 90.

  The X-ray detection unit 30 detects X-rays transmitted through the subject P, generates X-ray projection data, and outputs the generated X-ray projection data to the image data generation unit 50. The image data generation unit 50 processes the X-ray projection data output from the X-ray detection unit 30 to generate perspective image data, and outputs the generated perspective image data to the synthesis unit 71 of the display unit 70.

  The exposure information creation unit 60 is operated after the subject information supplied from the system control unit 90, the fluoroscopic conditions, the position of the top plate 7, the angle of the arm 8, the imaging region, the SID, and the operation for starting fluoroscopy. Based on the X-ray fluoroscopy time information when the specimen P is irradiated with fluoroscopic X-rays, the cumulative total of the irradiation of the subject P from the start of the examination to the generation of fluoroscopic image data by the image data generation unit 50 From the X-ray dose, the cumulative skin dose in the irradiation region where the cumulative skin dose in the X-ray irradiation region irradiated on the subject P is maximized is calculated. Next, gauge data representing a ratio of the calculated cumulative skin dose to a preset warning dose is created, and the created gauge data is output to the combining unit 71.

  The synthesizing unit 71 synthesizes the fluoroscopic image data output from the image data generating unit 50 and the gauge data output from the exposure information generating unit 60 corresponding to the fluoroscopic image data, and combines the synthesized first synthetic data into the first. Are output to the monitor 72. The first monitor 72 displays the first combined data output from the combining unit 71 in real time (step S2).

  FIG. 3 is a diagram illustrating an example of first composite data displayed on the screen of the first monitor 72. The screen 72a includes a first display area 721 for displaying image data and exposure information from the combining unit 71, and a second display area 722 arranged adjacent to the first display area 721. The first combined data 723 is displayed in the second display areas 721 and 722.

  The first composite data 723 includes perspective image data 724 and gauge data 725 represented by, for example, a progress bar. The perspective image data 724 is displayed in real time in the first display area 721, and the gauge data 725 is displayed in real time in the second display area 722.

  The gauge data 725 starts the examination of the subject P based on the ratio of the cumulative skin dose to the warning dose in the irradiation region where the cumulative skin dose in the X-ray irradiation region irradiated on the subject P is maximum. The cumulative skin dose before the start of X-ray irradiation is “0%”, and when the warning dose is reached, for example, “100%”. The proportion of the shaded bar extends in the direction of arrow L1 as the cumulative skin dose increases.

  The gauge data 725 is displayed in the second display area 722 until the operation for deleting the gauge data 725 after the operation for ending the inspection or the operation for starting the next inspection is performed after the operation for starting the inspection is performed. Is done.

  In addition, you may implement so that the value of the cumulative skin dose and warning dose in the irradiation region which becomes the maximum may be displayed in the second display area 722. Also, using a pie chart, as shown in FIG. 4, “0%”, the ratio of the calculated cumulative skin dose to the warning dose, “100%” is displayed, and the hatched portion is displayed as the cumulative skin dose increases. You may implement so that the ratio of an angle may increase in the arrow R1 direction.

  As described above, the gauge data 725 can be displayed on the first monitor 72 together with the perspective image data 724. This makes it possible to easily grasp in real time the cumulative skin dose in the irradiation region where the cumulative skin dose is maximized among the X-ray irradiation regions irradiated to the subject P, and to reduce the risk of skin damage. Inspection can be performed in consideration.

  Next, the bar of the hatched portion of the gauge data 725 displayed in the second display area 722 of the first monitor 72 after the operation of changing the irradiation field, for example, three times from the operation unit 80 is 100. When X-ray fluoroscopic stop operation is performed while the value is less than%, the image data generation unit 50 processes the X-ray projection data output from the X-ray detection unit 30 to perform X-ray fluoroscopy stop operation. Is generated, and the generated fluoroscopic image data is output to the combining unit 71 of the display unit 70.

  The exposure information creating unit 60 is the last fluoroscopic image generated when the operation is performed in the X-ray irradiation region irradiated on the subject P from the start of the examination to the operation of stopping the X-ray fluoroscopy. Area data representing an irradiation area excluding the irradiation area corresponding to the area of the image data is created, and the created area data is output to the combining unit 71. The synthesizing unit 71 synthesizes the stationary fluoroscopic image data output from the image data generating unit 50 and the area data output from the exposure information generating unit 60 corresponding to the fluoroscopic image data, and includes the synthesized area data. 2 composite data is output to the second monitor 73. The second monitor 73 displays the second combined data including the area data output from the combining unit 71 (Step S3 in FIG. 2).

  FIG. 5 is a diagram illustrating an example of second synthesized data including area data displayed on the screen of the second monitor 73. The screen 73 a is configured by a third display area 731 and a fourth display area 732 arranged adjacent to the third display area 731, and the second combined data 733 is displayed in the third display area 731. Has been.

  The second composite data 733 is composed of still perspective image data 7331 and region data 7332 to 7334 surrounded by three square frames color-coded in an identifiable manner displayed superimposed on the perspective image data 7331, for example. Is done. Note that the regions surrounded by the three region data 7332 to 7334 may be displayed by being color-coded with colors having transparency so that they can be identified.

  The area data 7332 corresponds to the irradiation area of the subject P irradiated with the X-rays from the X-ray diaphragm 12 restricted based on the information of the first irradiation field after the examination is started. The area data 7333 corresponds to the irradiation area of the subject P irradiated with the X-rays from the X-ray diaphragm 12 restricted based on the information of the second irradiation field. Further, the area data 7334 corresponds to the irradiation area of the subject P irradiated with the X-rays from the X-ray diaphragm 12 restricted based on the information of the third irradiation field. Furthermore, the fluoroscopic image data 7331 corresponds to the image data generated by the X-ray irradiation from the X-ray diaphragm 12 restricted based on the information of the fourth irradiation field.

  The second composite data 733 is displayed in the third display area 731, and the gauge data 725 displayed in the second display area 722 of the first monitor 72 is displayed in the fourth display area 732. May be.

  As described above, in accordance with the operation for stopping the fluoroscopy from the operation unit 80, the stationary fluoroscopic image data 7331 is displayed on the second monitor 73 and the region data 7332 to 7334 is displayed on the fluoroscopic image data 7331. be able to. Thereby, the irradiation area | region of the X-ray irradiated during the test | inspection of the subject P can be grasped | ascertained easily.

  Of the X-ray irradiation area irradiated to the subject P from the start of the examination to the operation of stopping the X-ray fluoroscopy, the area deviates from the area of the last fluoroscopic image data 7331 when the operation is performed, If there is an irradiation area corresponding to the area included in the third display area 731, area data representing the irradiation area is created. Then, as shown in FIG. 6, for example, the created area data 7335 can be displayed in the third display area 731.

  Thus, the area data 7335 outside the area of the perspective image data 7331 included in the third display area 731 can be displayed. Thereby, it is possible to grasp the X-ray irradiation area irradiated during the examination of the subject P over a wide range.

  Here, when an operation for displaying, for example, the area data 3D model is performed from the operation unit 80, the exposure information creation unit 60 is configured to include the imaging region including the imaging region based on the imaging region information supplied from the system control unit 90. A rotatable three-dimensional 3D model that models the specimen P is created, and X-rays irradiated to the specimen P from the start of the examination of the specimen P to the operation of stopping fluoroscopy After creating 3D region data for representing the irradiation region on the surface of the 3D model, region data 3D model is created by superimposing the created 3D region data on the 3D model surface. Then, the generated region data 3D model is output to the synthesis unit 71. The synthesizer 71 outputs the area data 3D model output from the exposure information generator 60 to the second monitor 73. The second monitor 73 displays the area data 3D model output from the synthesis unit 71.

  FIG. 7 is a diagram illustrating an example of the area data 3D model displayed on the screen of the second monitor 73. The area data 3D model 734 is displayed in the third display area 731 of the screen 73c.

  The region data 3D model 734 includes the 3D model 7341 of the subject P created by the exposure information creation unit 60 based on the information on the imaging region supplied from the system control unit 90, and the X-ray fluoroscopy is stopped after the examination is started. 3D region data 7342 to 7345 for representing on the surface of the 3D model 7341 the X-ray irradiation region irradiated on the subject P until the operation of.

  The 3D area data 7342 corresponds to, for example, the area of the perspective image data 7331 displayed on the screen 73 a in FIG. 5, and the 3D area data 7343 corresponds to the area of the area data 7332. The 3D area data 7344 corresponds to the area of the area data 7333, and the 3D area data 7345 corresponds to the area of the area data 7334.

  When a rotation operation is performed from the operation unit 80, the region data 3D model 3D734 is displayed from a desired angle rotated in the direction of the arrow R1 with the body axis of the 3D model 7341 as the rotation axis.

  Thus, by displaying the area data 3D model 734 on the second monitor 73, it is possible to display all the irradiation areas of the X-rays irradiated during the examination of the subject P. Further, by rotating the region data 3D model 734, it is possible to observe all irradiation regions of the X-rays irradiated to the subject P from various directions.

  After step S3 in FIG. 2, for example, a fluoroscopy condition changing operation is performed from the operation unit 80, and then a region of interest designating operation for displaying the maximum region where the cumulative skin dose is maximized and designating the maximum region is performed. Then, the exposure information creation unit 60 uses the accumulated X-ray dose irradiated to the subject P from the start of the examination to the generation of the fluoroscopic image data 7331, within the X-ray irradiation region irradiated to the subject P, The maximum area data representing the irradiation area where the accumulated skin dose of the irradiation area corresponding to the area of the fluoroscopic image data 7331 is maximized, and a fluoroscopic graph for predicting X-ray fluoroscopy corresponding to the maximum area data are created. Then, the generated maximum area data and perspective graph are output to the synthesis unit 71.

  The synthesizing unit 71 synthesizes the fluoroscopic image data 7331 output from the image data generating unit 50 and the maximum area data and fluoroscopic graph output from the exposure information generating unit 60 corresponding to the fluoroscopic image data 7331, and combines them. The second composite data including the area data and the perspective graph is output to the second monitor 73. The second monitor 73 displays the second combined data including the maximum area data and the perspective graph output from the combining unit 71 (step S4 in FIG. 2).

  FIG. 8 is a diagram illustrating an example of the second combined data including the maximum area data and the perspective graph displayed on the screen of the second monitor 73. Second composite data 735 is displayed in the third and fourth display areas 731 and 732 of the screen 73d.

  The second composite data 735 includes perspective image data 7331, maximum area data 7351 surrounded by a rectangular frame that can be identified and superimposed on the perspective image data 7331, and a perspective graph 736. The perspective image data 7331 and the maximum area data 7351 are displayed in the third display area 731, and the perspective graph 736 is displayed in the fourth display area 732.

  The area corresponding to the maximum area data 7351 is an area of a subset of, for example, three area data 7332 to 7334 displayed on the perspective image data 7331 shown in FIG.

  The perspective graph 736 represents the relationship between the fluoroscopic time and the integrated skin dose in the irradiation region corresponding to the maximum region data 7351.

  Note that a perspective graph corresponding to the region of interest can be ejected and displayed in the third display area 731 by a mouse operation from the operation unit 80 that moves the cursor to the region of interest on the perspective image data 7331. Further, after the cursor is moved to the region of interest on the fluoroscopic image data 7331, a perspective graph corresponding to the region of interest is pop-up displayed in the third display area 731 by a mouse operation from the operation unit 80 that clicks on the region of interest. can do. Furthermore, by specifying a plurality of regions of interest on the perspective image data 7331, a perspective graph corresponding to the plurality of regions of interest can be displayed in the fourth display area 732.

  As described above, the maximum area data 7351 can be displayed on the fluoroscopic image data 7331 displayed on the second monitor 73. As a result, it is possible to easily grasp the irradiation region in which the cumulative skin dose in the irradiation region corresponding to the region of the fluoroscopic image data 7331 becomes the maximum among the X-ray irradiation regions irradiated to the subject P.

  FIG. 9 is a diagram showing details of the perspective graph 736 shown in FIG. This perspective graph 736 includes a graph 7361 expressed as a relationship in which the direction of the horizontal axis is the X-ray irradiation time and the direction of the vertical axis is the cumulative skin dose, 7362 to 7365 extrapolated to the graph 7361, It is composed of a current time line 7366 indicating the time when the X-ray fluoroscopic stop operation is performed after the start operation is performed, and a warning dose line 7367 indicating the position of the warning dose.

  A graph 7361 represents the relationship between the irradiation time of the X-rays irradiated in the time zone T1 from the start of the examination operation to the current time line 7366 and the accumulated skin dose.

  A graph 7362 represents a relationship between an irradiation time predicted when X-rays for fluoroscopy are irradiated under a high fluoroscopic irradiation condition set in advance after the current time line 7366 and an integrated skin dose.

  A graph 7363 represents the relationship between the irradiation time predicted when the X-ray is irradiated under the fluoroscopic condition before the operation for stopping the X-ray fluoroscopy after the current time line 7366 and the accumulated skin dose.

  A graph 7364 represents the relationship between the irradiation time predicted when X-rays are irradiated under the fluoroscopic condition after the current time line 7366 is changed and the cumulative skin dose.

  A graph 7365 represents the relationship between the irradiation time and the skin dose predicted when fluoroscopic X-rays are irradiated under the low fluoroscopic irradiation conditions set in advance after the current time line 7366.

  As described above, the perspective graph 736 corresponding to the maximum area data 7351 displayed on the second monitor 73 can be displayed by changing the perspective condition from the operation unit 80. Then, by displaying the graph 7361, the cumulative skin dose from the start of the examination of the irradiation region corresponding to the maximum region data 7351 to the generation of the fluoroscopic image data 7331 in the X-ray irradiation region irradiated to the subject P can be obtained. I can grasp it.

  Further, by displaying the graph 7364, based on the examination information after changing the fluoroscopic conditions, irradiation of fluoroscopic X-rays irradiated after the generation of the fluoroscopic image data 7331 to the irradiation area corresponding to the maximum area data 7351 is performed. The relationship between time and accumulated skin dose can be predicted. Furthermore, by displaying each graph 7362, 7363, 7365, the maximum region data based on the examination information of the preset high fluoroscopic irradiation condition, the fluoroscopic condition before the change, and the preset low fluoroscopic irradiation condition. The relationship between the irradiation time of fluoroscopic X-rays irradiated after the generation of the fluoroscopic image data 7331 to the irradiation region corresponding to 7351 and the integrated skin dose can be predicted.

  Thereby, since each irradiation time until reaching the warning dose can be predicted, the irradiation range and irradiation time of the X-rays irradiated to the subject P after the generation of the fluoroscopic image data 7331 can be considered.

  If, for example, an imaging condition change operation is performed from the operation unit 80 after step S3, the exposure information creation unit 60 creates the maximum area data 7351 and an imaging graph that predicts X-ray imaging corresponding to the maximum area data 7351. The generated maximum area data 7351 and the photographed graph are output to the combining unit 71. The synthesizing unit 71 synthesizes the fluoroscopic image data 7331 output from the image data generating unit 50 and the maximum area data 7351 and the photographing graph output from the exposure information generating unit 60 corresponding to the fluoroscopic image data 7331. The second combined data including the maximum area data 7351 and the photographing graph is output to the second monitor 73. The second monitor 73 displays a photographic graph included in the second combined data output from the combining unit 71 in the fourth display area 732.

  FIG. 10 is a diagram showing details of the photographing graph displayed in the fourth display area 732 of the second monitor 73. The imaging graph 737 is expressed as a relationship with the graph 7361, the current time line 7366, and the warning dose line 7367 shown in FIG. 9, with the horizontal axis direction being the number of imaging times and the vertical axis direction being the cumulative skin dose. The graphs 7371 to 7374 are extrapolated to the graph 7361.

  A graph 7371 represents the relationship between the number of imaging times estimated when the X-ray for imaging is irradiated under the preset high imaging irradiation conditions after the current time line 7366 and the integrated skin dose.

  A graph 7372 represents the relationship between the number of times of imaging and the cumulative skin dose predicted when X-rays are irradiated after the current time line 7366 under the imaging conditions before performing the fluoroscopic stop operation.

  A graph 7373 represents a relationship between the number of imaging times estimated when the X-ray is irradiated under the imaging conditions after the change after the current time line 7366 and the integrated skin dose.

  A graph 7374 represents the relationship between the number of imagings and the skin dose predicted when X-rays for imaging are irradiated under the preset low imaging irradiation conditions after the current time line 7366.

  As described above, the photographing graph 737 corresponding to the maximum area data 7351 displayed on the second monitor 73 can be displayed by the photographing condition changing operation from the operation unit 80. Then, by displaying the graph 7373, based on the examination information after changing the imaging conditions, the number of imaging with the X-rays for imaging irradiated after the fluoroscopic image data 7331 is generated to the irradiation area corresponding to the maximum area data 7351 and The relationship of accumulated skin dose can be predicted. Further, by displaying the graphs 7371, 7372, and 7374, the maximum area data can be obtained based on the examination information of the preset high imaging irradiation condition, the imaging condition before the change, and the preset low imaging irradiation condition. It is possible to predict the relationship between the number of imaging with the X-rays for imaging irradiated after the fluoroscopic image data 7331 is generated to the irradiation region corresponding to 7351 and the integrated skin dose.

  Accordingly, since the number of times of imaging until reaching the warning dose can be predicted, the X-ray irradiation range irradiated on the subject P after the generation of the fluoroscopic image data 7331 and the number of times of imaging of the subject P are taken into consideration. can do.

  Next, when the shaded bar of the gauge data 725 displayed in the second display area 722 of the first monitor 72 indicates 100% or more, an operation for stopping X-ray fluoroscopy is performed from the operation unit 80. After that, when an operation for displaying the warning dose data is performed, the image data generation unit 50 processes the X-ray projection data output from the X-ray detection unit 30 and an operation for stopping X-ray fluoroscopy is performed. The last fluoroscopic image data is generated, and the generated fluoroscopic image data is output to the combining unit 71.

  Here, it is assumed that the irradiation region corresponding to the region of the last fluoroscopic image data includes an irradiation region in which the integrated skin dose is equal to or higher than the warning dose. In this case, the exposure information creation unit 60 irradiates the subject P from the accumulated X-ray dose irradiated to the subject P from the start of the examination to the generation of the last fluoroscopic image data by the image data generation unit 50. Among the X-ray irradiation areas, a warning representing an irradiation area in which the accumulated skin dose of the irradiation area corresponding to the last fluoroscopic image data area generated by the image data generation unit 50 is equal to or higher than a preset warning dose. Create region data. Then, the generated warning area data is output to the synthesis unit 71. The combining unit 71 combines the last stationary fluoroscopic image data output from the image data generating unit 50 and the warning area data output from the exposure information generating unit 60 corresponding to the fluoroscopic image data, and combines the combined warning region data Is output to the second monitor 73. The second monitor 73 displays the second combined data including the warning area data output from the combining unit 71 (step S5 in FIG. 2).

  FIG. 11 is a diagram showing an example of second synthesized data including warning area data displayed on the screen of the second monitor 73. Second composite data 738 is displayed in the third display area 731 of the screen 73e.

  The second composite data 738 is composed of still perspective image data 7381 and warning area data 7382 surrounded by, for example, a square frame so as to be identified and displayed superimposed on the perspective image data 7381. The warning area data 7382 is, for example, data in the same area as the maximum area data 7351 shown in FIG.

  In this way, by displaying the still fluoroscopic image data 7381 on the second monitor 73 and displaying the warning area data 7382, the cumulative skin dose in the X-ray irradiation area irradiated to the subject P is warned. It is possible to easily grasp the irradiation area that is higher than the dose. As a result, it is possible to perform an examination in consideration of an increased risk of skin damage, and skin damage can be reduced.

  According to the embodiment of the present invention described above, during or after the examination of the subject P created by the exposure information creation unit 60 corresponding to the image data together with the image data generated by the image data generation unit 50 The exposure information in can be displayed.

  Then, the fluoroscopic image data 724 is displayed in the first display area 721 of the first monitor 72, and the gauge data 725 is displayed in the second display area 722, whereby the X-rays irradiated on the subject P are displayed. It is possible to easily grasp the integrated skin dose in the irradiation region where the integrated skin dose is maximum among the irradiation regions in real time. In addition, in response to an operation for stopping fluoroscopy, the perspective image data 7331 that is stationary is displayed in the third display area 731 of the second monitor 73, and the region data 7332 through the superimposed image data 7331 are displayed. By displaying 7334, it is possible to easily grasp the X-ray irradiation area irradiated to the subject P. Further, by displaying the region data 7335 outside the region of the fluoroscopic image data 7331 included in the third display area 731, it is possible to grasp the X-ray irradiation region irradiated to the subject P over a wide range. Further, by displaying the area data 3D model 734 in the third display area 731, it is possible to display all irradiation areas of X-rays irradiated during the examination of the subject P. Further, by rotating the region data 3D model 734, it is possible to see all the irradiation regions of the X-rays irradiated to the subject P from various directions. Further, by displaying the maximum area data 7351 superimposed on the fluoroscopic image data 7331 displayed in the third display area 731, the irradiation corresponding to the area of the fluoroscopic image data 7331 in the irradiation area of the subject P. It is possible to easily grasp the region where the cumulative skin dose of the region is maximum. In addition, by displaying the warning area data 7382 superimposed on the fluoroscopic image data 7381 stationary on the second monitor 73, the cumulative skin dose in the X-ray irradiation area irradiated to the subject P is equal to or higher than the warning dose. It is possible to easily grasp the irradiation area. Further, by displaying a perspective graph corresponding to the region of interest on the fluoroscopic image data 7331 displayed in the third display area 731 by changing the fluoroscopic condition, based on the examination information after changing the fluoroscopic condition. The relationship between the irradiation time of the fluoroscopic X-rays to be irradiated and the cumulative skin dose can be expressed, and the irradiation time until reaching the warning dose can be predicted.

  In addition, in accordance with the X-ray imaging operation, the last captured image data generated by the imaging operation is displayed in the first display area 721 of the first monitor 72 of the display unit 70, and the second display area. Gauge data can be displayed at 722. In addition, the last captured image data can be displayed in the third display area 731 of the second monitor 73, and the region data can be displayed superimposed on the captured image data. In addition, area data outside the area of the last captured image data included in the third display area 731 can be displayed. Further, the maximum area data can be displayed superimposed on the last captured image data displayed in the third display area 731. Further, the warning area data can be displayed superimposed on the last captured image data of the second monitor 73. Further, by displaying an imaging graph corresponding to the region of interest on the last captured image data displayed in the third display area 731 by an operation for changing the imaging conditions, the inspection information after changing the imaging conditions is displayed. It is possible to represent the relationship between the number of times of photographing with X-rays for photographing irradiated and the cumulative skin dose, and the number of times of photographing until the warning dose is reached after changing the photographing conditions can be easily predicted. Thereby, the same effect as in the case of X-ray fluoroscopy can be obtained.

  As described above, various exposure information can be output in accordance with the state of the inspection during the inspection. As a result, the exposure information of the subject P can be easily grasped, and the examination can be performed in consideration of the risk of the skin damage of the subject P. Therefore, the skin damage can be reduced.

1 is a block diagram showing a configuration of an X-ray image diagnostic apparatus according to an embodiment of the present invention. The flowchart which shows operation | movement of the X-ray-image diagnostic apparatus which concerns on the Example of this invention. The figure which shows an example of the 1st synthetic | combination data displayed on the screen of the 1st monitor which concerns on the Example of this invention. The figure which shows the other example of the gauge data contained in the 1st synthetic | combination data based on the Example of this invention. The figure which shows an example of the 2nd synthetic | combination data containing the area | region data displayed on the screen of the 2nd monitor which concerns on the Example of this invention. The figure which shows the other example of the 2nd synthetic | combination data containing the area | region data displayed on the screen of the 2nd monitor which concerns on the Example of this invention. The figure which shows an example of the area | region data 3D model displayed on the screen of the 2nd monitor which concerns on the Example of this invention. The figure which shows an example of the 2nd synthetic | combination data containing the maximum area data and perspective graph which were displayed on the screen of the 2nd monitor which concerns on the Example of this invention. The figure which shows the detail of the perspective graph shown in FIG. The figure which shows the detail of the imaging | photography graph displayed on the 4th display area of the 2nd monitor which concerns on the Example of this invention. The figure which shows an example of the 2nd synthetic | combination data containing the warning area data displayed on the screen of the 2nd monitor which concerns on the Example of this invention.

Explanation of symbols

P Subject 7 Top plate 8 Arm 10 X-ray irradiation unit 11 X-ray tube 12 X-ray restrictor 20 High voltage generation unit 30 X-ray detection unit 31 X-ray detector 32 Signal processing unit 40 Mechanism unit 41 Top plate moving mechanism 42 Arm rotation mechanism 43 Mechanism control unit 50 Image data generation unit 60 Exposure information creation unit 70 Display unit 71 Composition unit 72 First monitor 73 Second monitor 80 Operation unit 90 System control unit

Claims (12)

An operation means capable of inputting examination information for examining a subject;
X-ray irradiation means for irradiating the subject with X-rays based on examination information input from the operation means;
X-ray detection means for generating X-ray projection data by detecting X-rays irradiated by the X-ray irradiation means and transmitted through the subject;
Image data generation means for processing the X-ray projection data generated by the X-ray detection means to generate image data;
Exposure information creation means for creating exposure information of the subject corresponding to the image data generated by the image data generation means based on examination information input from the operation means;
An X-ray diagnostic imaging apparatus comprising: display means for displaying the exposure information created by the exposure information creation means together with the image data generated by the image data generation means.   The exposure information creating means is configured to apply X rays irradiated to the subject from a cumulative X-ray dose irradiated to the subject from the start of examination of the subject to generation of image data by the image data generating means. The X-ray diagnostic imaging apparatus according to claim 1, wherein an integrated skin dose in an irradiation region in which an integrated skin dose in a radiation irradiation region is maximum is calculated. The exposure information creating means creates gauge data representing a ratio of the calculated cumulative skin dose to a preset warning dose,
The X-ray image according to claim 2, wherein the display means displays the gauge data created by the exposure information creation means in the vicinity of the image data generated by the image data generation means. Diagnostic device. The exposure information creating means includes an X-ray irradiation area irradiated on the subject from the start of the examination of the subject to the generation of image data by the image data generating means. Create area data that represents the irradiation area excluding the corresponding irradiation area,
2. The X according to claim 1, wherein the display means superimposes the area data created by the exposure information creation means on the image data generated by the image data generation means. Line image diagnostic device. The exposure information creating means includes an X-ray irradiation area irradiated on the subject from the start of the examination of the subject to the generation of image data by the image data generating means. Create region data representing an irradiation region that is out of the corresponding irradiation region and that corresponds to the region included in the display area that displays the image data generated by the image data generation unit of the display unit,
The X-ray image diagnosis apparatus according to claim 4, wherein the display unit displays the area data created by the exposure information creation unit in the display area. The exposure information creating means is configured to apply X rays irradiated to the subject from a cumulative X-ray dose irradiated to the subject from the start of examination of the subject to generation of image data by the image data generating means. Among the irradiation areas of the line, create the maximum area data representing the irradiation area where the integrated skin dose of the irradiation area corresponding to the area of the image data is maximum,
2. The display unit according to claim 1, wherein the display unit superimposes and displays the maximum area data created by the exposure information creation unit on the image data generated by the image data generation unit. X-ray image diagnostic apparatus. The exposure information creating means is configured to apply X rays irradiated to the subject from a cumulative X-ray dose irradiated to the subject from the start of examination of the subject to generation of image data by the image data generating means. The warning area data representing the irradiation area in which the cumulative skin dose of the irradiation area corresponding to the area of the image data within the irradiation area of the line is equal to or higher than a preset warning dose,
2. The display unit according to claim 1, wherein the display unit superimposes and displays the warning area data generated by the exposure information generation unit on the image data generated by the image data generation unit. X-ray image diagnostic apparatus.   The exposure information creation means creates a two-dimensional 2D model or a rotatable three-dimensional 3D model that models the subject based on an imaging region included in examination information input from the operation means, and In order to represent on the surface of the 2D model or the 3D model all irradiation regions of X-rays irradiated on the subject from the start of the examination of the subject to the generation of image data by the image data generating means 2. The X-ray image diagnostic apparatus according to claim 1, wherein after creating the area data, an area data model is created by superimposing the created area data on the surface of the 2D model or 3D model.   The exposure information creation means is generated by the image data generation means when an operation is performed in response to an operation for stopping fluoroscopic X-rays, an operation for X-ray imaging, or an operation for ending an examination from the operation means. 9. The X-ray image diagnostic apparatus according to claim 4, wherein the exposure information of the subject corresponding to the last image data to be created is created.   The exposure information creating means changes the examination information in response to an examination information changing operation including a change in an X-ray irradiation area or X-ray dose irradiated on the subject after the examination of the subject is started. The X-ray image diagnosis apparatus according to claim 1, wherein exposure information of the subject predicted by subsequent X-ray irradiation is created. The operation means designates a region of interest on the image data generated by the image data generation means,
The exposure information creating means corresponds to the irradiation time of the fluoroscopic X-ray changed according to the change of the examination information, and the region of interest designated from the operation means after starting the examination of the subject. The X-ray diagnostic imaging apparatus according to claim 10, wherein a fluoroscopic graph representing a relationship with an accumulated skin dose calculated from a cumulative X-ray dose irradiated to an irradiation region of a subject is created. The operation means designates a region of interest on the image data generated by the image data generation means,
The exposure information creating means corresponds to the number of times of imaging with the X-ray for imaging changed according to the change of the examination information, and the region of interest designated from the operation means after starting the examination of the subject. The X-ray image diagnostic apparatus according to claim 10, wherein an imaging graph representing a relationship with an accumulated skin dose calculated from a cumulative X-ray dose irradiated to an irradiation region of a subject is created.

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