JP4971021B2 - ECG data processing apparatus, ECG data processing method, and ECG data processing program - Google Patents

Description

  The present invention relates to an electrocardiogram data processing apparatus, an electrocardiogram data processing method, and an electrocardiogram data processing program.

  The electrocardiogram is biometric information mainly used for diagnosis of heart disease, and may be represented by a scalar (scalar electrocardiogram) or a vector (vector electrocardiogram). In the former case, the electromotive force fluctuation is expressed as an electrocardiogram waveform. On the other hand, in the latter case, the fluctuation of the electromotive force is expressed as a vector loop. The vector loop is information that can capture the three-dimensional characteristics of the electromotive force and the characteristics of the electrical excitation propagation in the heart. Further, the vector loop is defined by a set of coordinate points having X lead, Y lead and Z lead as the X component, Y component and Z component, respectively.

In the conventional method for expressing a vector electrocardiogram, a vector loop is projected onto a two-dimensional plane defined by two of the orthogonal coordinate axes constituting the orthogonal coordinate system of a three-dimensional space, that is, the X, Y, and Z axes. (For example, refer nonpatent literature 1). In general, a vector electrocardiogram showing a vector loop projected onto the XY plane is called a frontal view vector electrocardiogram (hereinafter simply referred to as “front view”), and is a vector loop projected onto the YZ plane. The vector electrocardiogram showing the vector loop is called a side view (Sagittal View) vector electrocardiogram (hereinafter simply referred to as “side view”), and the vector electrocardiogram showing the vector loop projected on the XZ plane is the horizontal view (Horizontal View) It is called a vector electrocardiogram (hereinafter simply referred to as “horizontal plan”).
PW Macfarlane et al., “12-lead vector electrocardiogram”, FIG. 3.3, Medical Electro Times, Inc., June 1996

  However, in the conventional method for expressing a vector electrocardiogram, the vector loop is projected only on the front surface, the side surface, and the horizontal plane. In other words, a conventional vector electrocardiogram is obtained by viewing a vector loop, which is three-dimensional information, from only a limited number of directions. Therefore, the original three-dimensional features of the vector loop can be expressed. Not. Although it is possible to estimate more features about the vector loop by carefully looking at the front, side, and horizontal views to diagnose findings related to heart disease, the accuracy or time required depends on the skill of the physician. Depends on. Therefore, the conventional vector electrocardiogram does not exhibit high utility in the diagnosis of heart disease.

  The present invention has been made in view of the above points, and an object thereof is to provide an electrocardiogram data processing apparatus, an electrocardiogram data processing method, and an electrocardiogram data processing program capable of improving the usefulness of a vector electrocardiogram.

The electrocardiogram data processing device of the present invention is configured to obtain an acquisition unit for acquiring three-dimensional coordinate data of a vector loop and a position different from the position on the three-dimensional orthogonal coordinate axis as a viewpoint or a direction different from the direction of the three-dimensional orthogonal coordinate axis. a setting unit that sets a direction, a vector electrocardiogram showing the vector loop as viewed from the set viewpoint or viewing directions, have a, a drawing unit for drawing based on the three-dimensional coordinate data obtained, the drawing unit A configuration is adopted in which the set viewpoint or viewing direction is drawn together with the vector electrocardiogram .

The electrocardiogram data processing method according to the present invention includes an acquisition step of acquiring three-dimensional coordinate data of a vector loop, a position different from the position on the three-dimensional orthogonal coordinate axis as a viewpoint, or a direction different from the direction of the three-dimensional orthogonal coordinate axis. a setting step of setting as the direction, a vector electrocardiogram showing the vector loop as viewed from the set viewpoint or viewing directions, have a, a drawing step of drawing based on the three-dimensional coordinate data obtained, the drawing step The set viewpoint or viewing direction is drawn together with the vector electrocardiogram .

The electrocardiogram data processing program of the present invention has an acquisition function for acquiring three-dimensional coordinate data of a vector loop, and a position different from the position on the three-dimensional orthogonal coordinate axis as a viewpoint or a direction different from the direction of the three-dimensional orthogonal coordinate axis. A drawing function for setting a direction and a drawing function for drawing a vector electrocardiogram showing a vector loop viewed from a set viewpoint or viewing direction based on the acquired three-dimensional coordinate data are realized by a computer, and the drawing is performed. The function is to draw the set viewpoint or viewing direction together with the vector electrocardiogram .

  According to the present invention, the usefulness of a vector electrocardiogram can be improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of an electrocardiogram data processing apparatus according to an embodiment of the present invention.

  In FIG. 1, the electrocardiogram data processing apparatus 100 includes a calculation unit 102, a storage unit 104, a measurement device control unit 106, an input device control unit 108, and an output device control unit 110. The electrocardiogram data processing apparatus 100 is typically realizable in a general-purpose computer such as a desktop PC (Personal Computer). The electrocardiogram data processing device 100 constitutes an electrocardiogram data processing system together with an electrocardiograph 112, an electrocardiogram electrode unit 114 for limbs, an electrocardiogram electrode unit 116 for chest, a mouse 118, a keyboard 120, a display device 122, and a printing device 124. .

  The measurement device control unit 106 stores a storage device such as a RAM (Random Access Memory) and a ROM (Read Only Memory) that stores a program for controlling communication with various medical measurement devices, and a CPU (Central Processing Unit) that executes the control program. Processing Unit) and a buffer for temporarily storing data exchanged with the medical measuring device in communication. Various medical measurement devices are connected to the electrocardiogram data processing apparatus 100 via a connector (not shown). In the present embodiment, an electrocardiograph 112 is connected to the electrocardiogram data processing apparatus 100. The measuring device control unit 106 realizes the following functions by executing the control program. That is, the measurement device control unit 106 receives an input of a command (import request) requesting import of 12-lead electrocardiogram data from the electrocardiograph 112 from the arithmetic unit 102 and transmits it to the electrocardiograph 112. Then, the measuring instrument control unit 106 receives the patient data and 12-lead ECG data specified in the import request transmitted from the electrocardiograph 112 in response to the import request, and sends them to the calculation unit 102. Output.

  Here, patient data is data for specifying individual patients such as names and identification numbers. The 12-lead ECG data is data including measurement results of the standard 12-lead method, and is generated by the electrocardiograph 112. Specifically, the electrocardiograph 112 includes an electrocardiogram electrode unit 114 for limbs having a plurality of electrocardiogram electrodes worn on the patient's limbs during electrocardiogram measurement, and a plurality of electrocardiogram electrodes attached to the patient's chest during electrocardiogram measurement. Using the electrocardiogram electrode part 116 for the chest, I lead, II lead, III lead, aVR lead, aVL lead, aVF lead, V1 lead, V2 lead, V3 lead, V4 lead, V5 lead by standard 12 lead method And V6 lead are measured, and digital data representing these measurement results is generated as 12-lead ECG data. The electrocardiograph 112 stores the generated 12-lead electrocardiogram data in association with patient data in a storage device (not shown) in the electrocardiograph 112.

  The electrocardiograph 112 also stores data associated with individual patients such as age, height, weight, etc. (hereinafter referred to as “attribute data”) in a storage device in the electrocardiograph 112 in association with the patient data. be able to. Further, when the electrocardiograph 112 has an analysis function, the generated 12-lead electrocardiogram data can be analyzed, and the analysis result can also be stored in a storage device in the electrocardiograph 112 in association with the patient data. When the electrocardiograph 112 has a built-in display device or printing device, the electrocardiograph 112 displays a scalar electrocardiogram on the built-in display device based on the generated 12-lead electrocardiogram data, or the built-in printing device. In addition, the analysis results can be displayed or printed together with or separately from the scalar electrocardiogram.

  With the various functions of the electrocardiograph 112, the measurement device control unit 106 displays the attribute data and / or the analysis result associated with the patient data together with the designated patient data and the 12-lead ECG data. If necessary, it can be received from the electrocardiograph 112 and output to the calculation unit 102.

  When the measuring device control unit 106 has a function of detecting the connection between the electrocardiograph 112 and the electrocardiogram data processing apparatus 100, the measuring device control unit 106 voluntarily issues an import request when detecting this connection. You may transmit to the electrocardiograph 112. Alternatively, the electrocardiograph 112 may start transmitting 12-lead ECG data without transmitting an import request from the measuring device control unit 106 to the electrocardiograph 112.

  The storage unit 104 is a large-capacity storage device, and stores programs that realize various functions of the calculation unit 102 in advance. The storage unit 104 can also store data input from the calculation unit 102 as needed. In addition, the storage unit 104 stores in advance various data used for drawing a vector electrocardiogram or an electrocardiogram report.

  The input device control unit 108 temporarily stores, for example, a storage device such as a RAM or a ROM that stores programs for processing inputs from various input devices, a CPU that executes the processing program, and inputs from the input devices. Mainly has a buffer for Various input devices are connected to the electrocardiogram data processing apparatus 100 via a connector (not shown). In the present embodiment, a mouse 118 and a keyboard 120 are connected to the electrocardiogram data processing apparatus 100. The input device control unit 108 implements a function of interpreting a doctor's input using the mouse 118 or the keyboard 120 as a command and outputting the command to the calculation unit 102 by executing the program. In the present embodiment, only the mouse 118 and the keyboard 120 are illustrated as input devices, but other input devices such as a touch panel and a pen tablet can be substituted or used together as necessary.

Here, examples of the input command include the following.
-Import request: Requests import of data from the electrocardiograph 112-Report display request: Requests display of an electrocardiogram report on the screen of the display device 122-Report print request: Report of an electrocardiogram report on a recording sheet by the printing device 124 Request printing-Analysis request: Request execution of analysis function-View display request: Request display of three-dimensional (hereinafter simply referred to as "3D") vector electrocardiogram on the screen of the display device 122-Viewpoint (or viewing direction) Designation: Request to change the viewpoint (or viewing direction) of a vector electrocardiogram by designating a new viewpoint (or viewing direction) of the 3D vector ECG already displayed on the screen of the display device 122

  In these commands, patient specifying data (for example, name, identification number, etc.) for specifying a patient is shown as necessary. Also, in the view display request, viewpoint (or viewing direction) specifying data (for example, coordinates, angle, etc.) for specifying the viewpoint (or viewing direction) is normally shown, but may not be shown. In specifying the viewpoint (or viewing direction), the viewpoint (or viewing direction) specifying data is always shown.

  Therefore, in the case of an import request, a report display request, a report print request, and an analysis request among the above commands, the doctor uses the mouse 118 or the keyboard 120 to indicate a desired process and a patient to be processed. The input device control unit 108 generates a command indicating the patient specifying data of the patient and instructing execution of the process, and outputs the command to the calculation unit 102. In the case of a view display request among the above commands, the doctor uses the mouse 118 or the keyboard 120 to indicate that the desired process is display of a 3D vector electrocardiogram, the patient to be displayed, and the 3D vector electrocardiogram. When the viewpoint (or viewing direction) is instructed, the input device control unit 108 generates a command indicating the patient specifying data and the viewpoint (or viewing direction) of the 3D vector electrocardiogram and requesting the execution of the 3D vector electrocardiogram display. This is output to the calculation unit 102. When the viewpoint (or viewing direction) is specified among the above commands, when the doctor instructs the desired viewpoint (viewing direction) of the 3D vector electrocardiogram using the mouse 118 or the keyboard 120, the input device control unit 108. Generates a command indicating the viewpoint (or viewing direction) of the 3D vector electrocardiogram and instructing execution of changing the viewpoint (or viewing direction) of the 3D vector electrocardiogram being displayed, and outputs the command to the calculation unit 102.

If the desired process is the display of an electrocardiogram report on the screen of the display device 122 or the printing device 124 printing the electrocardiogram report on a recording sheet, the doctor also specifies the items to be displayed or printed in the electrocardiogram report. The input device control unit 108 also indicates the designated item in the report display request or report print request to be generated. Examples of items that can be designated as display items or print items include the following.
・ 3D vector electrocardiogram ・ Results of vector electrocardiogram analysis ・ First synthetic electrocardiogram: ECG formed by arranging scalar electrocardiograms showing the waveforms of I, II, III, aVR, aVL, and aVF around the front view・ Second synthetic electrocardiogram: ECG in which scalar electrocardiograms showing each waveform of V1, V2, V3, V4, V5 and V6 are arranged around the horizontal plane ・ 12-lead ECG analysis result ・ Rhythm induction Waveform ・ Patient data

  The arithmetic unit 102 mainly has a CPU, and realizes a function of executing processing instructed by a command from the input device control unit 108 by executing a program stored in the storage unit 104.

  For example, when an import request is input from the input device control unit 108, the calculation unit 102 transfers the import request to the measurement device control unit 106. The calculation unit 102 receives data including patient data and 12-lead ECG data input from the measurement device control unit 106 after the import request is transferred, and stores the data in the storage unit 104. In this way, import of data from the electrocardiograph 112 is realized. The imported data may include attribute data and analysis results by the electrocardiograph 112 in addition to patient data and 12-lead ECG data.

  Further, the calculation unit 102 converts the imported 12-lead ECG data into XYZ lead ECG data by, for example, the inverse Dower method. Therefore, XYZ lead electrocardiogram data is included in 12 lead ECGs, I lead, II lead, III lead, aVR lead, aVL lead, aVF lead, V1 lead, V2 lead, V3 lead, V4 lead, V5 lead and V6 lead This is digital data representing the X lead, Y lead and Z lead derived from.

  Further, the calculation unit 102 generates vector loop data by combining the XYZ lead electrocardiogram data, and stores the generated XYZ lead electrocardiogram data and vector loop data in the storage unit 104 in association with the imported patient data. Here, the vector loop data is digital data representing 3D coordinates of a plurality of dots constituting a vector loop for one cardiac cycle (one beat), and is data for constituting a vector electrocardiogram. In this way, the calculation unit 102 can derive a vector electrocardiogram by converting the 12-lead electrocardiogram as a scalar electrocardiogram. That is, the calculation unit 102 has a function as a vector electrocardiogram acquisition unit that acquires a derived vector electrocardiogram.

  When an analysis request is input from the input device control unit 108, the calculation unit 102 reads the 12-lead ECG data and vector loop data of the patient specified by the patient specifying data in the analysis request from the storage unit 104, and reads An electrocardiogram analysis is performed on the data, and the result of this analysis process is stored in the storage unit 104 in association with the patient data.

  When a report display request is input from the input device control unit 108, the calculation unit 102 stores at least one of the 12-lead electrocardiogram data and the vector loop data of the patient specified by the patient specifying data in the report display request. Read from. Then, the computing unit 102 generates digital data representing an electrocardiogram report (hereinafter referred to as “electrocardiogram report data”) based on at least one of the read vector loop data and 12-lead electrocardiogram data. The electrocardiogram report data includes data on the item specified in the report display request.

  For example, when only the 3D vector electrocardiogram is designated as a display item in the report display request, the calculation unit 102 generates 3D vector electrocardiogram data from the designated patient vector loop data, and the 3D vector electrocardiogram is further displayed. ECG report data is generated by editing 3D vector electrocardiogram data to be displayed on the screen according to a predetermined format. The calculation unit 102 outputs the generated electrocardiogram report data to the output device control unit 110 together with a report display request.

  When a report print request is input from the input device control unit 108, the calculation unit 102 stores at least one of the 12-lead electrocardiogram data and the vector loop data of the patient specified by the patient specifying data in the report print request. Read from. Then, the computing unit 102 generates electrocardiogram report data based on at least one of the read vector loop data and 12-lead electrocardiogram data.

  For example, when only the 3D vector electrocardiogram is designated as a print item in the report print request, the calculation unit 102 generates 3D vector electrocardiogram data from the designated patient vector loop data, and the 3D vector electrocardiogram is further generated. ECG report data is generated by editing 3D vector electrocardiogram data to be printed on a recording sheet according to a predetermined format. The calculation unit 102 outputs the generated electrocardiogram report data to the output device control unit 110 together with the report print request.

  When a view display request is input from the input device control unit 108, the calculation unit 102 reads out the vector loop data of the patient specified by the patient specifying data in the view display request from the storage unit 104, and displays this as displayed data. Held in the internal holding means. Based on the read vector loop data, the calculation unit 102 converts the data indicating the 3D vector electrocardiogram (hereinafter referred to as “3D vector electrocardiogram data”) according to the viewpoint (or viewing direction) identification data or default in the view display request. It generates after setting the viewpoint (or viewing direction), and outputs it to the output device controller 110. The default value is stored in advance in the storage unit 104 and can be changed as appropriate.

  In addition, when a viewpoint (or viewing direction) designation is input from the input device control unit 108, the calculation unit 102 converts the 3D vector electrocardiogram data within the viewpoint (or viewing direction) designation based on the stored data being displayed. A viewpoint (or viewing direction) is set according to the viewpoint (or viewing direction) identification data, and is generated and output to the output device control unit 110.

  That is, the calculation unit 102 has a function as an acquisition unit that acquires vector loop data and a function as a setting unit that sets a viewpoint or a viewing direction.

  The output device control unit 110 stores a program that processes output to the display device 122 and a program that processes output to the printing device 124, such as a storage device such as a RAM or a ROM, a CPU that executes the processing program, and a display. It mainly has a buffer for temporarily storing output to the device 122 and the printing device 124. The display device 122 is a device mainly having a display screen such as a liquid crystal display or a CRT (Cathode Ray Tube), and is connected to the electrocardiogram data processing apparatus 100 via a connector (not shown). The printing device 124 is a device mainly including a paper feeding mechanism that feeds printing paper and a printing mechanism such as a thermal head type, a laser type, and an ink type that prints on the fed printing paper. It is connected to the electrocardiogram data processing apparatus 100 through a connector that is not connected.

  By executing the processing program, the output device control unit 110 realizes a function of causing the display device 122 to display an electrocardiogram report based on the electrocardiogram report data input from the calculation unit 102 or causing the printing device 124 to print the electrocardiogram report. To do. Specifically, when the report display request is input together with the electrocardiogram report data, the output device control unit 110 causes the display device 122 to display the electrocardiogram report on the screen, and the report print request is transmitted together with the electrocardiogram report data. When input, the printing apparatus 124 is caused to print the electrocardiogram report on the recording paper.

  Furthermore, the output device control unit 110 also realizes a function of displaying a 3D vector electrocardiogram on the display device 122 according to the 3D vector electrocardiogram data input from the calculation unit 102 by executing the processing program.

  Thereby, drawing of an electrocardiogram report and drawing of a 3D vector electrocardiogram are realized. That is, the combination of the calculation unit 102 and the output device control unit 110 constitutes a drawing unit that draws an electrocardiogram report or a 3D vector electrocardiogram.

  The configuration of the electrocardiogram data processing apparatus 100 according to this embodiment has been described above.

  In the above description, the electrocardiogram data processing apparatus 100 is independent of the electrocardiograph 112, but the electrocardiogram data processing apparatus 100 and the electrocardiograph 112 may be integrated. This can be realized by storing the various programs described for the electrocardiogram data processing apparatus 100 in a storage device in the electrocardiograph 112 and executing it by the CPU in the electrocardiograph 112.

  In the above description, the configuration of the electrocardiogram data processing apparatus 100 is roughly divided into a calculation unit 102, a storage unit 104, a measurement device control unit 106, an input device control unit 108, and an output device control unit 110 from a functional viewpoint. Each physical configuration is described individually, but these physical configurations may be common. For example, the CPU in the calculation unit 102, the measurement device control unit 106, the input device control unit 108, and the output device control unit 110 may be a common CPU, or the storage unit 104, the measurement device control unit 106, and the input device. The storage device in the control unit 108 and the output device control unit 110 may be a common storage device.

  Next, an example of data import processing in the calculation unit 102 will be described with reference to FIG.

  In step S1110, the calculation unit 102 receives from the measurement device control unit 106 patient data of the patient specified by the patient specifying data in the import request and 12-lead ECG data associated with the patient data. In step S1120, the calculation unit 102 stores the received patient data and 12-lead ECG data in the storage unit 104 in association with each other. In step S1130, the calculation unit 102 converts the received 12-lead electrocardiogram data by, for example, the inverse Dower method to generate XYZ lead electrocardiogram data. Further, in step S1140, operation unit 102 generates vector loop data by combining the generated XYZ lead electrocardiogram data. In step S1150, the calculation unit 102 stores the generated XYZ lead electrocardiogram data and vector loop data in the storage unit 104 in association with the received patient data. In this way, the calculation unit 102 creates or updates an electrocardiogram database for a patient at the time of data import.

  In this embodiment, a case where 12-lead ECG data is obtained by the standard 12-lead method and converted into XYZ-lead ECG data is described as an example. For example, XYZ-lead ECG data is obtained by the orthogonal axis lead method. May be obtained directly.

  Next, a 3D vector electrocardiogram drawing process in the electrocardiogram data processing apparatus 100 will be described. Here, three examples are given using FIG. 3, FIG. 4 and FIG.

  FIG. 3 shows a first example of the drawing process. In this example, a viewpoint is set and a 3D vector electrocardiogram is displayed.

  First, in step S <b> 1210, the doctor inputs a basic view display request command using the mouse 118 or the keyboard 120. Here, the basic view display request command is a kind of view display request command, and is a command that does not indicate viewpoint specifying data. That is, it means that the doctor has not specified the viewpoint. The input basic view display request command is sent from the input device control unit 108 to the calculation unit 102.

  In step S1220, the calculation unit 102 reads out from the storage unit 104 the vector loop data of the patient specified by the patient specifying data in the basic view display request command. The read vector loop data is held in the calculation unit 102 as display data.

  In step S1230, operation unit 102 generates 3D vector electrocardiogram data such that a later-described 3D vector electrocardiogram is displayed on the screen based on the read vector loop data. Since the viewpoint specifying data is not indicated in the input basic view display request command, the calculation unit 102 reads out the coordinate points stored in the storage unit 104 as a default when generating 3D vector electrocardiogram data. This is set as the viewpoint.

  In step S1240, the 3D vector electrocardiogram data generated by the calculation unit 102 is sent to the output device control unit 110, and the output device control unit 110 displays the 3D vector electrocardiogram on the screen of the display device 122 according to the 3D vector electrocardiogram data. Display. Thereby, the drawing of the basic view of the 3D vector electrocardiogram is realized.

  Here, for example, when a coordinate point on the Y-axis is determined as the viewpoint default, the displayed 3D vector electrocardiogram becomes a horizontal plane as shown in FIG. 6A, for example, a coordinate point on the Z-axis. Is defined as the viewpoint default, the displayed 3D vector electrocardiogram is a front view as shown in FIG. 6B, for example, when coordinate points on the X axis are defined as the viewpoint default. The displayed 3D vector electrocardiogram is a side view (here, the left side view (Left sagittal View)) as shown in FIG. Note that the default coordinates may be different from the coordinates on the X axis, the Y axis, and the Z axis.

  Further, as can be seen from the three examples in FIG. 6, in the 3D vector electrocardiogram to be drawn, the size of the dots constituting the vector loop is changed according to the coordinates, and the perspective of the vector loop is obtained. Expressive characteristics. Further, the human body model is drawn together with the 3D vector electrocardiogram as navigation of the viewpoint (or viewing direction). Further, a mark indicating the viewpoint (or viewing direction) for the human body model is drawn. In the 3D vector electrocardiogram of the present embodiment, this mark connects the dot indicated by the coordinates corresponding to the viewpoint in the three-dimensional orthogonal coordinate system drawn on the human body model, and this dot and the three-dimensional orthogonal coordinate system. And a line indicating the viewing direction. By drawing the human body model and the mark, it is possible to easily understand from which viewpoint (or viewing direction) the drawn 3D vector electrocardiogram is viewed. The human body model and mark picture data are stored in the storage unit 104 in advance, and read out to the calculation unit 102 when necessary. In addition, when a vector loop is drawn by color-coded by colors respectively associated with a plurality of parts obtained by subdividing one cardiac cycle, the characteristics of the drawn vector loop can be more easily determined. .

  In step S 1250, the doctor inputs a viewpoint designation command using the mouse 118 or the keyboard 120. The input viewpoint designation command is sent from the input device control unit 108 to the calculation unit 102. Designation of the viewpoint may be performed by inputting the value (x, y, z) of the coordinate point with the numeric keypad of the keyboard 120, or may be performed by dragging the mark being displayed with the mouse 118. It can also be done by other suitable methods. If the input value x of the X component, the input value y of the Y component, and the input value z of the Z component are all non-zero values, the viewpoint can be set to a coordinate different from the coordinate on the three-dimensional orthogonal coordinate axis.

  In step S1260, the calculation unit 102 generates 3D vector electrocardiogram data such that a later-described 3D vector electrocardiogram is displayed on the screen based on the vector loop data read in step S1220, that is, held display data. At this time, the calculation unit 102 sets the coordinate point designated by the viewpoint designation command as a new viewpoint.

  In step S1270, the 3D vector electrocardiogram data generated by the calculation unit 102 is sent to the output device control unit 110, and the output device control unit 110 displays the 3D vector electrocardiogram on the screen of the display device 122 according to the 3D vector electrocardiogram data. Display. Thereby, the drawing of the 3D vector electrocardiogram viewed from an arbitrarily designated viewpoint is realized. FIG. 7A shows an example of a 3D vector electrocardiogram viewed from an arbitrarily designated viewpoint.

  In the example of FIG. 3, the viewpoint is not designated at first, but the viewpoint can be designated from the beginning.

  FIG. 4 shows a second example of the drawing process. In this example, the 3D vector electrocardiogram is displayed with the viewing direction set to the open view direction.

  First, in step S1310, the doctor inputs an open view display request command using the mouse 118 or the keyboard 120. That is, it means that a doctor requests display of an open view. The input open view display request command is sent from the input device control unit 108 to the calculation unit 102.

  Here, the open view display request command is a kind of view display request command, and is a command indicating viewing direction specifying data. Further, the viewing direction specifying data of this command indicates the open view direction. The open view is a vector electrocardiogram viewed from the direction in which the vector loop has the maximum projected area (open view direction). In other words, in this vector electrocardiogram, the vector loop is viewed from the front.

  In step S1320, the calculation unit 102 reads out from the storage unit 104 the vector loop data of the patient specified by the patient specifying data in the open view display request command. The read vector loop data is held in the calculation unit 102 as display data.

  In step S1330, the calculation unit 102 generates 3D vector electrocardiogram data such that an open-view 3D vector electrocardiogram is displayed on the screen based on the read vector loop data. At this time, the calculation unit 102 sets the open view direction specified by the viewing direction specifying data in the open view display request command as the viewing direction.

  In step S1340, the 3D vector electrocardiogram data generated by the calculation unit 102 is sent to the output device control unit 110, and the output device control unit 110 displays the 3D vector electrocardiogram on the screen of the display device 122 according to the 3D vector electrocardiogram data. Display. Thereby, the drawing of the open view 3D vector electrocardiogram is realized. FIG. 7B is an example of an open view 3D vector electrocardiogram.

  FIG. 5 shows a third example of the drawing process. In this example, a 3D vector electrocardiogram is displayed with the viewing direction set to the edge view direction.

  First, in step S1410, the doctor inputs an edge view display request command using the mouse 118 or the keyboard 120. That is, it means that the doctor requests display of the edge view. The input edge view display request command is sent from the input device control unit 108 to the calculation unit 102.

  Here, the edge view display request command is a kind of view display request command, and is a command indicating viewing direction specifying data. Furthermore, the viewing direction specifying data of this command indicates the edge view direction. The edge view is a vector electrocardiogram obtained by viewing the vector loop from the direction (edge view direction) in which the projected area is minimized. In other words, in this vector electrocardiogram, the vector loop is viewed from the side.

  In step S1420, the calculation unit 102 reads out from the storage unit 104 the vector loop data of the patient specified by the patient specifying data in the edge view display request command. The read vector loop data is held in the calculation unit 102 as display data.

  In step S1430, operation unit 102 generates 3D vector electrocardiogram data such that the 3D vector electrocardiogram of the edge view is displayed on the screen based on the read vector loop data. At this time, the calculation unit 102 sets the edge view direction specified by the viewing direction specifying data in the edge view display request command as the viewing direction.

  In step S1440, the 3D vector electrocardiogram data generated by the calculation unit 102 is sent to the output device control unit 110, and the output device control unit 110 displays the 3D vector electrocardiogram on the screen of the display device 122 according to the 3D vector electrocardiogram data. Display. Thereby, drawing of the 3D vector electrocardiogram of the edge view is realized. FIG. 7C is an example of an edge view 3D vector electrocardiogram.

  In the example of FIGS. 4 and 5, the case where the open view direction and the edge view direction different from the direction of the three-dimensional orthogonal axis are set as the viewing direction has been described. However, the viewing direction can be freely set by designating any other direction with the mouse 118 or the keyboard 120 as in the case of the viewpoint. That is, the rendering of a 3D vector electrocardiogram viewed from an arbitrarily designated direction is realized. In these examples, the viewing direction is specified first, but it is also possible to use the default value without first specifying the viewing direction, and then specify the viewing direction.

  A plurality of 3D vector electrocardiograms exemplified in FIG. 6 and FIG. 7 can be displayed or printed together in one electrocardiogram report. For example, as shown in FIGS. 8 and 9, a 3D vector electrocardiogram viewed from different directions can be displayed or printed with its name. The example of FIG. 8 illustrates an electrocardiogram report in which six 3D vector electrocardiograms are aligned, and the example of FIG. 9 arranges a 3D vector electrocardiogram with a specified viewing direction (or viewpoint) at the center and surroundings 6 illustrates an electrocardiogram report in which other 3D vector electrocardiograms are arranged. The format of such an electrocardiogram report can be arbitrarily specified in a report display (or print) request or in a command independent of the report display (or print) request, and an electrocardiogram waveform, patient data, an electrocardiogram analysis result, etc. Can be displayed or printed together.

  Here, a modification of the drawing mode of the 3D vector electrocardiogram will be described with reference to FIG. In this example, the area around the vector loop is filled, and the electromotive force vector lines constituting the vector loop are shown, so that the vector loop is stretched. Thereby, the twist of the surface of electrical excitation propagation, the speed of electrical excitation propagation, etc. can be clarified.

  FIG. 11 shows another modification of the drawing mode of the 3D vector electrocardiogram. In this example, a heart model and a face model are drawn together with a three-dimensionally expressed vector loop. By drawing the heart model, it is possible to clarify the correspondence between the shape of the vector loop and the shape of the heart. Also, the orientation of the vector loop can be clarified by drawing the face model. Note that the heart model and face model picture data is stored in the storage unit 104 in advance, and is read out by the calculation unit 102 when necessary.

  In the example of FIG. 11, among the electromotive force vectors constituting the vector loop, the initial vector (the electromotive force vector at the start of ventricular excitement) and the maximum vector (the electromotive force when the ventricular excitement is maximized). The electric power vector) and the direction of rotation of the vector loop (excitation propagation direction) are indicated by arrows, and the characteristics of the vector loop can be further clarified.

  As still another modification, the vector loop can be expressed as a moving image after setting the viewpoint or the viewing direction. The moving image expression of the vector loop can be realized by sequentially drawing the dots constituting the vector loop at such a low speed that the user can visually follow the drawing process.

  As described above, according to the present embodiment, a position different from the position on the three-dimensional orthogonal coordinate axis is set as the viewpoint, or a direction different from the direction of the three-dimensional orthogonal coordinate axis is set as the viewing direction, and the set viewpoint or viewing direction is set. Since the 3D vector electrocardiogram viewed from the perspective is drawn, the original three-dimensional expression of the vector loop can be accurately captured, and thus the usefulness of the vector electrocardiogram in the diagnosis of heart disease can be improved.

  The embodiment of the present invention has been described above. The above description is an illustration of a preferred embodiment of the present invention, and the scope of the present invention is not limited to this, and the above embodiment can be implemented with various modifications.

1 is a block diagram showing the configuration of an electrocardiogram data processing apparatus according to an embodiment of the present invention The flowchart which shows the data import process which concerns on one embodiment of this invention The flowchart which shows an example of the drawing process of 3D vector electrocardiogram based on one embodiment of this invention The flowchart which shows the other example of the drawing process of 3D vector electrocardiogram based on one embodiment of this invention The flowchart which shows the further another example of the drawing process of 3D vector electrocardiogram based on one embodiment of this invention The figure which shows three types of 3D vector electrocardiogram which concerns on one embodiment of this invention The figure which shows the other three types of 3D vector electrocardiogram which concerns on one embodiment of this invention The figure which shows an example of the electrocardiogram report which concerns on one embodiment of this invention The figure which shows the other example of the electrocardiogram report which concerns on one embodiment of this invention The figure which shows the modification of the drawing aspect of 3D vector electrocardiogram which concerns on one embodiment of this invention The figure which shows the other modification of the drawing aspect of the 3D vector electrocardiogram which concerns on one embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Electrocardiogram data processing apparatus 102 Arithmetic unit 104 Storage unit 106 Measuring device control unit 108 Input device control unit 110 Output device control unit 112 Electrocardiograph 122 Display device 124 Printing device

Claims (7)

An acquisition unit for acquiring vector loop three-dimensional coordinate data;
A setting unit that sets a position different from the position on the three-dimensional orthogonal coordinate axis as a viewpoint or a direction different from the direction of the three-dimensional orthogonal coordinate axis as a viewing direction;
The set viewpoint or viewing vector electrocardiogram showing the vector loop as seen from the direction, have a, a drawing unit for drawing based on the three-dimensional coordinate data obtained,
The electrocardiogram data processing apparatus , wherein the drawing unit draws a set viewpoint or viewing direction together with the vector electrocardiogram . The drawing unit, the human body model and draw together with the vector electrocardiogram, electrocardiographic data according to claim 1, wherein an object that represents the viewpoint or viewing direction with respect to the human body model, characterized by drawing a set viewpoint or viewing directions Processing equipment.   The electrocardiogram data processing apparatus according to claim 1, wherein the drawing unit draws a surface having the vector loop as an outer periphery together with the vector electrocardiogram.   2. The electrocardiogram data processing apparatus according to claim 1, wherein the drawing unit aligns a plurality of electrocardiogram vectors defining the vector loop with the center coordinates of the vector electrocardiogram and draws the electrocardiogram data together with the vector electrocardiogram.   The electrocardiogram data processing apparatus according to claim 1, wherein the drawing unit draws a heart model together with the vector electrocardiogram. An acquisition step of acquiring three-dimensional coordinate data of the vector loop;
A setting step for setting a position different from the position on the three-dimensional orthogonal coordinate axis as a viewpoint or a direction different from the direction of the three-dimensional orthogonal coordinate axis as a viewing direction;
The set viewpoint or viewing vector electrocardiogram showing the vector loop as seen from the direction, have a, a drawing step of drawing based on the three-dimensional coordinate data obtained,
The electrocardiogram data processing method , wherein the drawing step draws the set viewpoint or viewing direction together with the vector electrocardiogram . An acquisition function to acquire the three-dimensional coordinate data of the vector loop;
A setting function for setting a position different from the position on the three-dimensional orthogonal coordinate axis as a viewpoint or a direction different from the direction of the three-dimensional orthogonal coordinate axis as a viewing direction;
A computer that realizes a drawing function for drawing a vector electrocardiogram showing a vector loop viewed from a set viewpoint or viewing direction based on the acquired three-dimensional coordinate data ,
The drawing function draws a set viewpoint or viewing direction together with the vector electrocardiogram,
ECG data processing program.

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