JP5984249B2 - Medical equipment - Google Patents

Description

Embodiments described herein relate generally to a medical device.

  An X-ray CT (Computed Tomography) apparatus is an apparatus that scans a subject using X-rays and processes the collected data by a computer, thereby imaging the inside of the subject.

  Specifically, the X-ray CT apparatus irradiates the subject a plurality of times from different directions along a circular orbit centered on the subject. The X-ray CT apparatus collects a plurality of detection data by detecting X-rays transmitted through a subject with an X-ray detector. The collected detection data is A / D converted by the data collection unit and then transmitted to the console device. The console device pre-processes the detection data and creates projection data. Then, the console apparatus performs reconstruction processing based on the projection data, and creates volume data based on tomographic image data or a plurality of tomographic image data. Volume data is a data set representing a three-dimensional distribution of CT values corresponding to a three-dimensional region of a subject.

  The X-ray CT apparatus can perform MPR (Multi Planar Reconstruction) display by rendering the volume data in an arbitrary direction. Hereinafter, a cross-sectional image displayed in MPR by rendering volume data may be referred to as an “MPR image”. The MPR image includes, for example, an axial image showing a cross section orthogonal to the body axis, a sagittal image showing a cross section of the subject along the body axis, and a coronal image showing a cross section of the subject along the body axis. There is. Furthermore, an arbitrary cross-sectional image (oblique image) in the volume data is also included in the MPR image. The plurality of created MPR images can be simultaneously displayed on a display unit or the like.

  There is an imaging method called CT fluoroscopy (CTF) that is performed using an X-ray CT apparatus. CT fluoroscopy is an imaging method in which an image relating to a region of interest of a subject is obtained in real time by continuously irradiating the subject with X-rays. In CT fluoroscopy, images are created in real time by reducing the detection data collection rate and reducing the time required for reconstruction processing. CT fluoroscopy is used, for example, for confirming the positional relationship between the tip of a puncture needle and a part from which a specimen is collected during a biopsy, or for confirming the position of a tube when performing a drainage method. The drainage method is a method of draining the body fluid accumulated in the body cavity with a tube or the like.

  When performing a biopsy on a subject while referring to an MPR image based on volume data obtained by CT fluoroscopy, for example, scanning and puncturing may be performed alternately. Specifically, first, an MPR image of the subject is acquired by CT fluoroscopy. A doctor or the like performs puncturing while referring to the MPR image. At this time, for example, in order to confirm the positional relationship between the tip of the puncture needle and the part from which the specimen is collected, CT fluoroscopy is performed again at a stage where puncture is performed to some extent. While referring to the MPR image obtained by another CT fluoroscopy, the doctor or the like further advances the puncture. This operation is repeated until the biopsy is completed.

  In addition, when performing a biopsy by CT fluoroscopy, a puncture plan may be created in advance. The puncture plan is information including a preset insertion path of the puncture needle to the subject (hereinafter sometimes referred to as “planned path”). The puncture plan is set, for example, by drawing a planned route by inputting an instruction from a mouse or the like in a CT image acquired in advance before performing CT fluoroscopy. A doctor or the like punctures a subject while referring to a CT image showing a planned route and an MPR image based on volume data obtained by X-ray scanning each time.

  Further, the X-ray CT apparatus can display an image (hereinafter sometimes referred to as “viewing box”) schematically representing volume data on the display unit together with the MPR image. In the viewing box, the cross-sectional position of the displayed MPR image (which cross-section of the volume data corresponds to the displayed MPR image) can be displayed.

JP 2002-112998 A

  By the way, in order to surely puncture the subject, there is a demand for an operator to easily grasp information related to the puncture plan such as the position of the planned route and the position of the image used for setting the planned route.

Embodiments have been made to solve the above-described problems, and an object thereof is to provide a medical device capable of presenting information related to a puncture plan.

The medical device according to the embodiment includes a setting unit, a creation unit, and a display control unit. The setting unit is used to set the insertion path of the puncture needle for the subject with respect to the image based on the volume data. The creation unit extracts the outline of the volume data , reduces the extracted outline, and creates a figure expressing the reduced outline . The display control unit displays the image and the graphic side by side on the display unit, and displays the path image corresponding to the insertion path on the graphic.

1 is a block diagram of an X-ray CT apparatus according to a first embodiment. It is a figure which supplements description of the setting part which concerns on 1st Embodiment. It is a figure which supplements description of the setting part which concerns on 1st Embodiment. It is a figure which supplements description of the preparation part which concerns on 1st Embodiment. It is a figure which supplements description of the preparation part which concerns on 1st Embodiment. It is a figure which supplements description of the display control part which concerns on 1st Embodiment. It is a figure which supplements description of the setting part which concerns on 1st Embodiment. It is a figure which supplements description of the display part which concerns on 1st Embodiment. It is a flowchart which shows the outline | summary of operation | movement of the X-ray CT apparatus which concerns on 1st Embodiment. It is a figure which supplements description of the display control part which concerns on 2nd Embodiment. It is a figure which supplements description of the display control part which concerns on 2nd Embodiment. It is a flowchart which shows the outline | summary of operation | movement of the X-ray CT apparatus which concerns on 2nd Embodiment. It is a figure which supplements description of the display control part which concerns on 2nd Embodiment. It is a figure which supplements description of the display control part which concerns on 3rd Embodiment. It is a figure which supplements description of the display control part which concerns on 3rd Embodiment. It is a flowchart which shows the outline | summary of operation | movement of the X-ray CT apparatus which concerns on 3rd Embodiment. It is a figure which supplements description of the display part which concerns on 3rd Embodiment. It is a block diagram of the X-ray CT apparatus which concerns on 4th Embodiment. It is a figure which supplements description of the display control part which concerns on 4th Embodiment. It is a flowchart which shows the outline | summary of operation | movement of the X-ray CT apparatus which concerns on 4th Embodiment. It is a figure which supplements description of the preparation part which concerns on the modification 1. FIG. It is a block diagram of the X-ray CT apparatus which concerns on the modification 3. It is a figure which supplements description of the display control part which concerns on the modification 3. FIG.

(First embodiment)
The configuration of the X-ray CT apparatus 1 according to the first embodiment will be described with reference to FIGS. 1 to 6. Note that “image” and “image data” have a one-to-one correspondence, and in the present embodiment, they may be regarded as the same. In the present embodiment, the body axis direction of the subject E is defined as the Z direction (slice direction), the lateral direction orthogonal to the body axis direction is defined as the X direction (channel direction), and the longitudinal direction is defined as the Y direction.

<Device configuration>
As shown in FIG. 1, the X-ray CT apparatus 1 includes a gantry device 10, a bed device 30, and a console device 40.

[Mounting device]
The gantry device 10 is an apparatus that irradiates the subject E with X-rays and collects detection data of the X-rays transmitted through the subject E. The gantry device 10 includes an X-ray generator 11, an X-ray detector 12, a rotating body 13, a high voltage generator 14, a gantry driver 15, an X-ray diaphragm 16, a diaphragm driver 17, And a data collection unit 18.

  The X-ray generator 11 includes an X-ray tube that generates X-rays (for example, a vacuum tube that generates a cone-shaped or pyramid-shaped X-ray beam, not shown). The X-ray generator 11 exposes the generated X-rays to the subject E.

  The X-ray detection unit 12 includes a plurality of X-ray detection elements (not shown). The X-ray detection unit 12 detects X-rays that have passed through the subject E. Specifically, the X-ray detection unit 12 detects X-ray intensity distribution data (hereinafter sometimes referred to as “detection data”) indicating the intensity distribution of X-rays transmitted through the subject E with an X-ray detection element. The detection data is output as a current signal. As the X-ray detection unit 12, for example, a two-dimensional X-ray detector (plane detector) in which a plurality of detection elements are arranged in two directions (slice direction and channel direction) orthogonal to each other is used. The plurality of X-ray detection elements are provided, for example, in 320 rows along the slice direction. By using a multi-row X-ray detector in this way, it is possible to image a three-dimensional imaging region having a width in the slice direction by one rotation scan (volume scan). The slice direction corresponds to the body axis direction of the subject E, and the channel direction corresponds to the rotation direction of the X-ray generation unit 11.

  The rotating body 13 is a member that supports the X-ray generation unit 11 and the X-ray detection unit 12 so as to face each other with the subject E interposed therebetween. The rotating body 13 has an opening 13a penetrating in the slice direction. In the gantry device 10, the rotating body 13 is arranged so as to rotate in a circular orbit around the subject E. That is, the X-ray generation unit 11 and the X-ray detection unit 12 are provided so as to be rotatable along a circular orbit centered on the subject E.

  The high voltage generator 14 applies a high voltage to the X-ray generator 11 (hereinafter, “voltage” means the voltage between the anode and the cathode in the X-ray tube). The X-ray generator 11 generates X-rays based on the high voltage.

  The gantry driving unit 15 drives the rotating body 13 to rotate. The X-ray diaphragm section 16 has a slit (opening) having a predetermined width, and by changing the width of the slit, the fan angle (expansion angle in the channel direction) of X-rays exposed from the X-ray generation section 11 and X Adjust the cone angle of the line (the spread angle in the slice direction). The diaphragm drive unit 17 drives the X-ray diaphragm unit 16 so that the X-rays generated by the X-ray generation unit 11 have a predetermined shape.

  A data collection unit 18 (DAS: Data Acquisition System) collects detection data from the X-ray detection unit 12 (each X-ray detection element). The data collection unit 18 converts the collected detection data (current signal) into a voltage signal, periodically integrates and amplifies the voltage signal, and converts the voltage signal into a digital signal. Then, the data collecting unit 18 transmits the detection data converted into the digital signal to the console device 40. In addition, when performing CT fluoroscopy, the data collection part 18 shortens the collection rate of detection data.

[Bed equipment]
The couch device 30 is a device for placing and moving the subject E to be imaged. The couch device 30 includes a couch 31 and a couch driving unit 32. The couch 31 includes a couch top 33 for placing the subject E and a base 34 that supports the couch top 33. The couch top 33 can be moved by the couch driving unit 32 in the body axis direction of the subject E and in the direction perpendicular to the body axis direction. That is, the bed driving unit 32 can insert and remove the bed top plate 33 on which the subject E is placed with respect to the opening 13 a of the rotating body 13. The base 34 can move the bed top 33 in the vertical direction (a direction perpendicular to the body axis direction of the subject E) by the bed driving unit 32.

[Console device]
The console device 40 is used for operation input to the X-ray CT apparatus 1. The console device 40 has a function of reconstructing CT image data (tomographic image data and volume data) representing the internal form of the subject E from the detection data collected by the gantry device 10. The console device 40 includes a processing unit 41, a setting unit 42, a creation unit 43, a display control unit 44, a display unit 45, a storage unit 46, a scan control unit 47, and a control unit 48. Has been.

  The processing unit 41 executes various processes on the detection data transmitted from the gantry device 10 (data collection unit 18). The processing unit 41 includes a preprocessing unit 41a, a reconstruction processing unit 41b, and a rendering processing unit 41c.

  The pre-processing unit 41a performs pre-processing such as logarithmic conversion processing, offset correction, sensitivity correction, and beam hardening correction on detection data detected by the gantry device 10 (X-ray detection unit 12) to create projection data. To do.

  The reconstruction processing unit 41b creates CT image data (tomographic image data and volume data) based on the projection data created by the preprocessing unit 41a. For reconstruction of tomographic image data, any method such as a two-dimensional Fourier transform method, a convolution / back projection method, or the like can be employed. Volume data is created by interpolating a plurality of reconstructed tomographic image data. For the reconstruction of volume data, for example, an arbitrary method such as a cone beam reconstruction method, a multi-slice reconstruction method, an enlargement reconstruction method, or the like can be adopted. As described above, a wide range of volume data can be reconstructed by volume scanning using a multi-row X-ray detector. Further, when performing CT fluoroscopy, since the collection rate of the detection data is shortened, the reconstruction time by the reconstruction processing unit 41b is shortened. Therefore, real-time CT image data corresponding to scanning can be created.

  The rendering processor 41c performs a rendering process on the volume data created by the reconstruction processor 41b.

  For example, the rendering processing unit 41c creates a pseudo three-dimensional image (image data) by performing volume rendering processing on the volume data. The “pseudo three-dimensional image” is an image for displaying the three-dimensional structure of the subject E two-dimensionally.

  In addition, the rendering processing unit 41c creates an MPR image (image data) by performing rendering processing on the volume data in a desired direction. The “MPR image” is an image showing a desired cross section of the subject E. The MPR image includes an axial image, a sagittal image, and a coronal image that are three orthogonal cross sections. Alternatively, the rendering processing unit 41c may create an oblique image indicating an arbitrary cross section as an MPR image.

  The setting unit 42 is used to set the insertion path of the puncture needle for the subject E with respect to the image based on the volume data. The insertion path to be set is a path (planned path) indicating the route through which the puncture needle is inserted into the subject E.

  As a specific example of the setting unit 42, a case where the insertion path I is set for an MPR image based on volume data (first volume data) obtained by scanning (first scan) performed at a certain timing will be described. Hereinafter, an axial image is used as an example of an MPR image, but the configuration of the present embodiment can be similarly applied to a sagittal image or a coronal image.

2A and 2B show an axial image AI ₁ that is a cross section in the Z direction based on the first volume data.

For the axial image AI ₁ displayed on the display unit 45, the surgeon uses the input device (not shown) or the like to perform a biopsy using the position S of the target site (lesion site or the like) and the puncture needle on the body surface. Two points at the insertion position P are designated (see FIG. 2A). The setting unit 42 calculates the shortest distance L connecting the two points, and sets a line segment connecting the shortest distances L as the insertion path I (see FIG. 2B). The set insertion path I (coordinate value) is stored in the storage unit 46. The axial image AI ₁ is an image based on three-dimensional volume data. Therefore, the insertion path I set in the axial image AI ₁ can be specified by a three-dimensional coordinate value.

The surgeon can also directly draw a line segment indicating the insertion path on the axial image AI ₁ using an input device or the like. In this case, the setting unit 42 sets the drawn line segment as the insertion path I. Alternatively, setting unit 42, by performing image analysis processing of region growing method or the like to the axial image AI _1, and calculates the position of the nearest body surface from the position and lesion lesion. And the setting part 42 can also calculate the line segment which connects them, and can also set the said line segment as the insertion path | route I. FIG.

  Further, the image for setting the insertion path I is not limited to the MPR image. For example, the setting unit 42 may set the insertion path I by a method similar to the above for a pseudo three-dimensional image based on volume data (an image for displaying a three-dimensional structure two-dimensionally). Is possible.

  The creation unit 43 creates a cuboid figure (hereinafter also referred to as a “viewing box”) that represents volume data in a simulated manner. Note that since the pseudo three-dimensional image of the viewing box created by the creating unit 43 and the viewing box displayed on the display unit 45 by the display control unit 44 correspond one-to-one, they are the same in this embodiment. You may see. The shape of the volume data is determined based on the size of the X-ray detection unit 12, the scan range, and the like.

  As a specific example of the creation unit 43, a case where the viewing box V is created based on the volume data D will be described. Here, the volume data D is shown as a cube which is a rectangular parallelepiped having the same length of each side. Further, it is assumed that the viewing box V and the volume data D are in the same coordinate system. First, the creation unit 43 extracts the contour portion O of the volume data D by a method such as edge detection (see FIG. 3A). Next, the creation unit 43 creates the viewing box V by converting the extracted contour portion O at a predetermined scale (see FIG. 3B). The scale is a value set in advance based on, for example, the display area of the viewing box V on the display unit 45.

  In the present embodiment, the creation unit 43 creates the viewing box V so that the scales of the sides of the volume data D are the same. For example, a case where the scale is set to 1/10 will be described. As shown in FIG. 3A, when the length of one side of the volume data D (contour portion O) is 100 mm, the creation unit 43 displays a cube-shaped viewing with a side length of 10 mm based on the scale 1/10. Box V is created.

  In FIGS. 3A and 3B, when the volume data D is a cube, the viewing box V is also created to be a cube (example of creating the viewing box so that each side has the same scale). showed that. Here, by using multi-row X-ray detection elements, it is possible to set a wider detection range in the body axis direction (Z direction) than in the X direction and the Y direction. Accordingly, the shape of the volume data obtained may be a rectangular parallelepiped in which the length of the side in the Z direction is different from the length of the side in the X direction and the Y direction. In this case, the creation unit 43 creates the viewing box V in a rectangular parallelepiped based on the volume data shape (cuboid). For example, as shown in FIG. 4, it is assumed that volume data D (contour portion O) in which the length of the side in the Z direction is 200 mm while the length of the side in the X direction and the Y direction is 100 mm is obtained. In this case, based on a preset scale (for example, 1/10), the creation unit 43 has a viewing box V having a side length in the X and Y directions of 10 mm and a side length in the Z direction of 20 mm. Is created (see FIG. 4).

  The display control unit 44 performs various controls related to image display. For example, the display unit 45 is controlled to display a pseudo three-dimensional image or MPR image created by the rendering processing unit 41c.

  Further, in the present embodiment, the display control unit 44 displays a graphic (viewing box V) on the display unit 45 and displays a path image I ′ corresponding to the insertion path I on the graphic (viewing box V). .

  Specifically, the display control unit 44 displays the created viewing box V on the display unit 45 as a pseudo three-dimensional image. Further, the display control unit 44 creates a route image I ′ by converting the insertion route I stored in the storage unit 46 at the same scale as that when the viewing box V is created. The display control unit 44 displays the created route image I ′ in the viewing box V (see FIG. 3C. FIG. 3C shows the viewing box V displayed on the display unit 45). The route image I ′ is an example of “information related to the puncture plan”.

  As described above, the viewing box V and the volume data D (outline portion O) are in the same coordinate system. Therefore, the position and orientation of the path image I ′ displayed in the viewing box V and the position and orientation of the insertion path I in the volume data D have a correspondence relationship. That is, by referring to the viewing box V displayed on the display unit 45, the surgeon can easily grasp the information (position and orientation) of the planned route (insertion route I).

  The display unit 45 includes an arbitrary display device such as an LCD (Liquid Crystal Display) or a CRT (Cathode Ray Tube) display. For example, the display unit 45 displays an MPR image obtained by rendering volume data.

FIG. 5 is an example of the display screen M in the display unit 45. Here, an example in which an axial image AI ₁ in which the insertion path I is planned is displayed on the display screen M will be described. The display control unit 44 displays the viewing box V (route image I ′) at a predetermined display position on the display screen M. The display position of the viewing box V may be set in advance, or may be arbitrarily set using an input device or the like. When a plurality of MPR images are displayed on the display unit 45, the display control unit 44 can also display the viewing box V for each image. For example, when an axial image, a sagittal image, and a coronal image are displayed, the display control unit 44 displays the viewing box V for each image.

  The storage unit 46 is configured by a semiconductor storage device such as a RAM or a ROM. The storage unit 46 stores detection data, projection data, or CT image data after reconstruction processing, in addition to the setting position of the insertion path.

  The scan control unit 47 controls various operations related to X-ray scanning. For example, the scan control unit 47 controls the high voltage generation unit 14 to apply a high voltage to the X-ray generation unit 11. The scan control unit 47 controls the gantry driving unit 15 to rotationally drive the rotating body 13. The scan control unit 47 controls the aperture driving unit 17 to operate the X-ray aperture unit 16. The scan control unit 47 controls the bed driving unit 32 to move the bed 31.

  The control unit 48 performs overall control of the X-ray CT apparatus 1 by controlling operations of the gantry device 10, the couch device 30, and the console device 40. For example, the control unit 48 controls the scan control unit 47 to cause the gantry device 10 to perform a preliminary scan and a main scan and collect detection data. Further, the control unit 48 controls the processing unit 41 to perform various types of processing (preprocessing, reconstruction processing, etc.) on the detected data. Alternatively, the control unit 48 controls the display control unit 44 to display an image based on the CT image data stored in the storage unit 46 on the display unit 45.

<Operation>
Next, the operation of the X-ray CT apparatus 1 according to the present embodiment will be described with reference to FIG.

  First, the X-ray CT apparatus 1 performs an X-ray scan on the subject E and creates first volume data.

  Specifically, the X-ray generation unit 11 emits X-rays to the subject E. The X-ray detection unit 12 detects X-rays that have passed through the subject E, and acquires the detection data (S10). Detection data detected by the X-ray detection unit 12 is collected by the data collection unit 18 and sent to the processing unit 41 (pre-processing unit 41a).

  The pre-processing unit 41a performs pre-processing such as logarithmic conversion processing, offset correction, sensitivity correction, and beam hardening correction on the detection data acquired in S10, and creates projection data (S11). The created projection data is sent to the reconstruction processing unit 41b based on the control of the control unit 48.

  The reconstruction processing unit 41b creates a plurality of tomographic image data based on the projection data created in S11. The reconstruction processing unit 41b creates first volume data by performing interpolation processing on a plurality of tomographic image data (S12).

Rendering processing unit 41c creates an axial image AI ₁ by rendering the first volume data created in S12. The display control unit 44 displays the created axial image AI ₁ on the display unit 45 (S13).

With reference to the axial image AI ₁ displayed on the display unit 45, the operator make plans for insertion path I of the puncture needle (planned route). Surgeon the position of the lesion in the axial image AI ₁ by the input device or the like, and specifies the insertion position of the puncture needle. The setting unit 42 sets a line segment connecting the designated positions as the insertion path I (S14). The setting unit 42 sends the coordinate value of the insertion path I to the storage unit 46. The storage unit 46 stores the insertion path I (coordinate value) (S15).

  The creation unit 43 creates the viewing box V by converting the first volume data created in S12 at a predetermined scale (S16).

  The display control unit 44 displays the viewing box V created in S16 on the display unit 45, and displays the path image I ′ corresponding to the insertion path I stored in S15 at the corresponding position in the viewing box V. (S17).

  The processing unit 41, the setting unit 42, the creation unit 43, the display control unit 44, the scan control unit 47, and the control unit 48 may be, for example, a CPU (Central Processing Unit), a GPU (Graphic Processing Unit), or an ASIC (Application Specific). A processing device (not shown) such as an integrated circuit (ROM) and a storage device (not shown) such as a ROM (Read Only Memory), a RAM (Random Access Memory), or an HDD (Hard Disc Drive) may be used. The storage device stores a processing program for executing the function of the processing unit 41. The storage device also stores a setting unit processing program for executing the function of the setting unit 42. The storage device stores a creation program for executing the function of the creation unit 43. Further, the storage device stores a display control program for executing the function of the display control unit 44. Further, the storage device stores a scan control program for executing the function of the scan control unit 47. The storage device stores a control program for executing the function of the control unit 48. A processing device such as a CPU executes the functions of each unit by executing each program stored in the storage device.

<Action and effect>
The operation and effect of this embodiment will be described.

  The X-ray CT apparatus 1 of the present embodiment creates volume data based on the result of scanning the subject E with X-rays. The X-ray CT apparatus 1 includes a setting unit 42, a creation unit 43, and a display control unit 44. The setting unit 42 is used to set the insertion path I of the puncture needle for the subject E with respect to the image based on the volume data. The creation unit 43 creates a cuboid figure (viewing box V) that represents volume data in a simulated manner. The display control unit 44 displays a figure on the display unit 45 and displays a path image I ′ corresponding to the insertion path I on the figure.

  Specifically, the creation unit 43 creates a figure so that each side has the same scale based on the shape of the volume data.

  In this way, the display control unit 44 displays the viewing box V on the display unit 45 and displays the route image I ′ corresponding to the insertion route I on the viewing box V. The viewing box V is obtained by converting each side of the volume data D at the same scale. Therefore, the path image I ′ is displayed at the position (orientation) of the viewing box V corresponding to the position (orientation) of the insertion path I in the volume data D. The surgeon can grasp the position (orientation) of the planned route (insertion route I) by checking the viewing box V on which the route image I ′ is displayed. That is, the X-ray CT apparatus 1 in the present embodiment can present information related to the puncture plan.

(Second Embodiment)
Next, the configuration of the X-ray CT apparatus 1 according to the second embodiment will be described with reference to FIGS. 7A to 9. In the present embodiment, a configuration in which a cross-sectional position corresponding to an MPR image in which the insertion path I is set is displayed on the viewing box V will be described. The cross-sectional position corresponding to the MPR image in which the insertion path I is set is an example of “information regarding puncture plan”. Detailed description of the same configuration as that of the first embodiment will be omitted.

  In the present embodiment, the setting unit 42 obtains the position (coordinate value) in the volume data of the MPR image in which the insertion path I is set. The position is stored in the storage unit 46.

  In the present embodiment, the display control unit 44 displays a graphic (viewing box) on the display unit 45 and displays a cross-sectional position corresponding to the MPR image in which the insertion path I is set on the graphic (viewing box).

  Specifically, the display control unit 44 displays the viewing box V created by the creation unit 43 on the display unit 45 as a pseudo three-dimensional image. Further, the display control unit 44 converts the position (coordinate value) of the MPR image stored in the storage unit 46 at the same scale as that used when creating the viewing box V. Then, the display control unit 44 specifies the position in the viewing box V corresponding to the converted value as the cross-sectional position. The display control unit 44 displays the cross-sectional position in the viewing box V.

  For example, assume that the insertion path I is set based on the axial image AI at the position C of the volume data D (see FIG. 7A). In this case, if the scale of the viewing box V is 1/10, the display control unit 44 converts the position C at a scale of 1/10, and converts the corresponding position in the viewing box V to the cross-sectional position C ′. As specified. Then, the display control unit 44 displays the sectional position C ′ in the viewing box V (see FIG. 7B. FIG. 7B shows the viewing box V displayed on the display unit 45). The viewing box V and the volume data D are in the same coordinate system. Therefore, the position of the cross-sectional position C ′ displayed in the viewing box V and the position C of the axial image AI in the volume data D have a correspondence relationship. That is, the surgeon can easily grasp the position of the MPR image in which the insertion path I is set by referring to the viewing box V displayed on the display unit 45.

<Operation>
Next, the operation of the X-ray CT apparatus 1 according to the present embodiment will be described with reference to FIG.

  First, the X-ray CT apparatus 1 performs an X-ray scan on the subject E and creates first volume data.

Specifically, the X-ray generation unit 11 emits X-rays to the subject E. The X-ray detection unit 12 detects X-rays that have passed through the subject E and acquires the detection data (S20). The pre-processing unit 41a performs pre-processing such as logarithmic conversion processing, offset correction, sensitivity correction, and beam hardening correction on the detection data acquired in S20 to create projection data (S21). The reconstruction processing unit 41b creates a plurality of tomographic image data based on the projection data created in S21. In addition, the reconstruction processing unit 41b creates first volume data by interpolating a plurality of tomographic image data (S22). Rendering processing unit 41c creates an axial image AI ₁ by rendering the first volume data created in S22. The display control unit 44 displays the created axial image AI ₁ on the display unit 45 (S23).

With reference to the axial image AI ₁ displayed on the display unit 45, the operator make plans for insertion path I of the puncture needle (planned route). Surgeon the position of the lesion in the axial image AI ₁ by the input device or the like, and specifies the insertion position of the puncture needle. The setting unit 42 sets a line segment connecting the designated positions as the insertion path I (S24). The setting unit 42 sends the position C of the axial image AI _{1 where} the insertion path I is set to the storage unit 46. The storage unit 46 stores the position C of the axial image AI _{1 where} the insertion path I is set (S25).

  Further, the creation unit 43 creates the viewing box V by converting the first volume data created in S22 at a predetermined scale (S26).

  The display control unit 44 displays the viewing box V created in S26 on the display unit 45, and displays the cross-sectional position C ′ corresponding to the position C stored in S25 at the corresponding position of the viewing box V. (S27).

  The display control unit 44 can also display the route image I ′ in the viewing box V along with the cross-sectional position C ′.

  In this case, the setting unit 42 obtains the position (coordinate value) in the volume data of the MPR image in which the insertion path I is set, and the insertion path I (coordinate value) in the MPR image. Those coordinate values are stored in the storage unit 46.

  The display control unit 44 displays the viewing box V created by the creation unit 43 on the display unit 45 as a pseudo three-dimensional image. Further, the display control unit 44 creates a route image I ′ by converting the insertion route I stored in the storage unit 46 at the same scale as that when the viewing box V is created. Further, the display control unit 44 specifies a position obtained by converting the MPR image position stored in the storage unit 46 at the same scale as the viewing box V as the cross-sectional position C ′. The display control unit 44 displays the route image I ′ and the cross-sectional position C ′ in the viewing box V (see FIG. 9. FIG. 9 shows the viewing box V displayed on the display unit 45).

<Action and effect>
The operation and effect of this embodiment will be described.

  The X-ray CT apparatus 1 of the present embodiment creates volume data based on the result of scanning the subject E with X-rays. The X-ray CT apparatus 1 includes a setting unit 42, a creation unit 43, and a display control unit 44. The setting unit 42 is used to set the insertion path I of the puncture needle for the subject E with respect to the MPR image based on the volume data. The creation unit 43 creates a cuboid figure (viewing box) that simulates volume data. The display control unit 44 displays a figure on the display unit 45 and displays the cross-sectional position C ′ corresponding to the MPR image in which the insertion path I is set on the figure.

  Further, the X-ray CT apparatus 1 of the present embodiment creates volume data based on the result of scanning the subject E with X-rays. The X-ray CT apparatus 1 includes a setting unit 42, a creation unit 43, and a display control unit 44. The setting unit 42 is used to set the insertion path I of the puncture needle with respect to the subject E for the MPR image based on the volume data. The creation unit 43 creates a cuboid figure (viewing box) that simulates volume data. The display control unit 44 displays a graphic on the display unit 45, and displays a path image I ′ corresponding to the insertion path I and a cross-sectional position C ′ corresponding to the MPR image in which the insertion path I is set.

  As described above, the display control unit 44 displays the viewing box V on the display unit 45 and displays the cross-sectional position C ′ (and the path image I ′) corresponding to the MPR image in which the insertion path I is set as the viewing box V. To display. Therefore, the surgeon confirms the viewing box V on which the cross-sectional position C ′ (and the route image I ′) is displayed, so that the position of the image used for setting the insertion route I (and the position of the planned route) Can be grasped. That is, the X-ray CT apparatus 1 in the present embodiment can present information related to the puncture plan.

(Third embodiment)
The configuration of the X-ray CT apparatus 1 according to the third embodiment will be described with reference to FIGS. 10A to 12. In the present embodiment, a configuration in which a cross-sectional position corresponding to the position of the currently displayed MPR image is displayed in the viewing box V will be described. Detailed description of the same configuration as the above embodiment is omitted. Moreover, although this embodiment demonstrates based on the structure of 2nd Embodiment, it is applicable also to the structure of 1st Embodiment.

  In the present embodiment, the display control unit 44 views a cross-sectional position corresponding to an MPR image based on other volume data (second volume data) created based on a scan (second scan) at a timing different from the first scan. In the inbox V.

As a specific example, a case where the cross-sectional position c ′ corresponding to the axial image AI ₂ based on the second volume data is displayed in the viewing box V will be described. Here, a state in which an axial image AI ₁ in which an insertion path I is set and a viewing box V in which a cross-sectional position C ′ is displayed is displayed at a predetermined display position on the display screen M (see FIG. 10A). ). Similarly to the second embodiment, the cross-sectional position C ′ is a position corresponding to the position C of the axial image AI _{1 where} the insertion path I is set.

  In the present embodiment, the first volume data and the second volume data are assumed to have the same number of tomographic image data and the number of pixels of the image. In addition, the imaging conditions of the first scan and the second scan (imaging position, rotation speed of the rotating body 13, etc.) are also assumed to be equal. That is, it is assumed that the first volume data and the second volume data are in the same coordinate system.

When the second scan is performed, the rendering processing unit 41c performs an axial image at a preset position c (or a position designated by the input device or the like) with respect to the second volume data based on the detected detection data. Create AI ₂ . Axial image AI ₂ is created, the display control unit 44, is displayed on the display unit 45 (display screen M) (see FIG. 10B).

Further, the display control unit 44 specifies a cross-sectional position c ′ corresponding to the position c of the axial image AI ₂ in the viewing box V. As described above, the first volume data and the second volume data are in the same coordinate system. Therefore, the second volume data and the viewing box V are also in the same coordinate system. That is, the display control unit 44 can specify the cross-sectional position c ′ by converting the position c at the scale when the viewing box V is created. Then, the display control unit 44 causes the viewing box V to display the cross-sectional position c ′ corresponding to the position c of the axial image AI ₂ (see FIG. 10B).

Here, when the cross-sectional position C ′ and the cross-sectional position c ′ coincide, the axial image AI ₁ planned for the insertion path I and the axial image AI ₂ currently displayed also coincide. Therefore, when the puncture along the planned insertion path I is performed, so that the puncture needle on the axial image AI ₂ that is currently displayed is displayed. Therefore, the surgeon can grasp whether the puncture is progressing as planned.

On the contrary, when the cross-sectional position C ′ and the cross-sectional position c ′ are shifted (in the case of FIG. 10B), the axial image AI ₁ planned for the insertion path I and the axial image AI ₂ currently displayed do not match. It will be. However, since the surgeon can confirm the deviation between the axial images in the viewing box V, the positional relationship of the axial image AI ₁ (image in which the insertion path I is set) with respect to the currently displayed axial image AI ₂ is easy. Can grasp. In this case, based on an instruction input from an input device or the like, the rendering processing unit 41c can change the rendering direction so that the cross-sectional position c ′ coincides with the cross-sectional position C ′.

  Note that the display control unit 44 can also display a mark (an arrow or the like, not shown) indicating the rendering direction of the second volume data in the viewing box V. By confirming this mark, the surgeon can easily grasp from which direction the image displayed on the display screen is the volume data rendered.

<Operation>
Next, the operation of the X-ray CT apparatus 1 according to the present embodiment will be described with reference to FIG. Here, the operation when performing biopsy using CT fluoroscopy after creating the insertion path I of the puncture needle in the axial image AI ₁ will be described.

  Before starting a biopsy, the X-ray CT apparatus 1 first performs X-ray scan (first scan) on the subject E to create volume data (first volume data).

  Specifically, the X-ray generation unit 11 emits X-rays to the subject E. The X-ray detection unit 12 detects X-rays that have passed through the subject E and acquires the detection data (S30). The preprocessing unit 41a performs preprocessing such as logarithmic conversion processing, offset correction, sensitivity correction, and beam hardening correction on the detection data acquired in S30, and creates projection data (S31). The reconstruction processing unit 41b creates a plurality of tomographic image data based on the projection data created in S31. Further, the reconstruction processing unit 41b creates first volume data by interpolating a plurality of tomographic image data (S32).

Rendering processing unit 41c creates an axial image AI ₁ by rendering the first volume data created in S32. The display control unit 44 displays the created axial image AI ₁ on the display unit 45 (S33).

The surgeon makes a plan for the insertion path I of the puncture needle while referring to the axial image AI ₁ displayed on the display unit 45. Surgeon the position of the lesion in the axial image AI ₁ by the input device or the like, and specifies the insertion position of the puncture needle. The setting unit 42 sets a line segment connecting the designated positions as the insertion path I (S34). The setting unit 42 sends the position C in the first volume data of the axial image AI ₁ in which the insertion path I is set to the storage unit 46. The storage unit 46 stores the position C of the axial image AI ₁ (S35).

  Further, the creation unit 43 creates the viewing box V by converting the first volume data created in S32 at a predetermined scale (S36).

The display control unit 44 displays displayed on the display unit 45 has been viewing box V created, and S35 in the corresponding cross-sectional position C'to the position C of the axial image AI _1, which is stored in the viewing box V in S36 (S37; see FIG. 10A).

Thereafter, the surgeon advances the puncture to the subject E while referring to the axial image AI ₁ and the viewing box V showing the insertion path I.

  After a certain amount of biopsy (after inserting the puncture needle into the subject E), the X-ray CT apparatus 1 is used to confirm the puncture state (whether the puncture needle is traveling along the planned path, etc.). Performs an X-ray scan (second scan) on the subject E again to create volume data (second volume data).

  That is, as in the first scan, the X-ray generation unit 11 emits X-rays to the subject E. The X-ray detection unit 12 detects X-rays that have passed through the subject E, and acquires the detection data (S38). Note that the imaging conditions of the first scan and the second scan are the same.

The preprocessing unit 41a performs preprocessing on the detection data acquired in S38 and creates projection data (S39). The reconstruction processing unit 41b creates second volume data by interpolating a plurality of tomographic image data created based on the projection data created in S39 (S40). Rendering processing unit 41c creates an axial image AI ₂ by rendering the second volume data. The display control unit 44 displays an axial image AI ₂ created on the display unit 45 (S41. See Fig. 10B).

The display control unit 44 specifies the cross-sectional position c ′ corresponding to the position c of the axial image AI ₂ in the second volume data (S42).

  The display control unit 44 displays the viewing box V created in S36 on the display unit 45, and displays the cross-sectional position c ′ specified in S42 on the viewing box V (S43, see FIG. 10B).

  The display control unit 44 can simultaneously display an axial image, a sagittal image, and a coronal image on the display screen, and can display a cross-sectional position corresponding to each image on the viewing box.

FIG. 12 shows a display screen of the display unit 45. The display screen Ma～Mc, axial image AI ₂ based on the second volume data, sagittal image SI _2, the coronal image CI ₂ is displayed. In the viewing boxes Va to Vc, a cross-sectional position C ′ corresponding to the position C of the MPR image (here, the axial image AI ₁ ) in which the insertion path I is set is displayed. In the viewing boxes Va to Vc, a cross-sectional position c′a corresponding to the position of the currently displayed axial image AI ₂ , a cross-sectional position c′c corresponding to the position of the coronal image CI ₂ , and the sagittal image SI ₂ A cross-sectional position c ′s corresponding to the position is displayed.

<Action and effect>
The operation and effect of this embodiment will be described.

  The display control unit 44 in the X-ray CT apparatus 1 of the present embodiment supports MPR images based on other volume data (second volume data) created based on a scan (second scan) at a timing different from the first scan. The cross-sectional position c ′ to be displayed is displayed on the figure (viewing box V).

  Specifically, the display control unit 44 causes the display unit 45 to display an MPR image based on other volume data (second volume data).

  Thus, for the viewing box V on which the cross-sectional position C ′ (or path image I ′) corresponding to the MPR image in which the insertion path I is set is displayed, the display control unit 44 obtains the volume obtained at a certain timing. The cross-sectional position c ′ corresponding to the MPR image based on the data is displayed. Thus, the surgeon can view the section (or planned insertion path I) of the insertion path I in the viewing box V and the currently displayed MPR image (MPR image based on other volume data). Can be easily grasped. That is, the X-ray CT apparatus 1 in the present embodiment can present information related to the puncture plan.

(Fourth embodiment)
The configuration of the X-ray CT apparatus 1 according to the fourth embodiment will be described with reference to FIGS. In the present embodiment, a configuration in which an image corresponding to the puncture needle PN is displayed on the viewing box V will be described. Detailed description of the same configuration as the above embodiment is omitted.

  As shown in FIG. 13, the X-ray CT apparatus 1 in the present embodiment has a detection unit 49. The detection unit 49 detects the puncture needle PN inserted into the subject E based on other volume data (second volume data) created based on a scan (second scan) at a timing different from the first scan. . In the stage of acquiring the second volume data, it is assumed that the puncture needle PN has already been punctured with respect to the subject E.

  For example, the detecting unit 49 detects a voxel having a CT value corresponding to the CT value of the puncture needle PN from the second volume data, thereby detecting the position of the voxel as the position (coordinate value) of the puncture needle PN.

  The display control unit 44 creates an image PN ′ corresponding to the puncture needle PN by converting the detected position (coordinate value) of the puncture needle PN at the same scale as that when the viewing box V is created. To do. The display control unit 44 displays the created image PN ′ in the viewing box V (see FIG. 14. FIG. 14 shows the viewing box V displayed on the display unit 45).

<Operation>
Next, the operation of the X-ray CT apparatus 1 according to the present embodiment will be described with reference to FIG. Here, the operation when performing biopsy using CT fluoroscopy after creating the insertion path I of the puncture needle in the axial image AI ₁ will be described.

  Before starting a biopsy, the X-ray CT apparatus 1 first performs X-ray scan (first scan) on the subject E to create volume data (first volume data).

  Specifically, the X-ray generation unit 11 emits X-rays to the subject E. The X-ray detection unit 12 detects X-rays that have passed through the subject E and acquires the detection data (S50). The preprocessing unit 41a performs preprocessing such as logarithmic conversion processing, offset correction, sensitivity correction, and beam hardening correction on the detection data acquired in S50 to create projection data (S51). The reconstruction processing unit 41b creates a plurality of tomographic image data based on the projection data created in S51. Further, the reconstruction processing unit 41b creates first volume data by interpolating a plurality of tomographic image data (S52).

Rendering processing unit 41c creates an axial image AI ₁ by rendering the first volume data created in S52. The display control unit 44 displays the generated axial image AI ₁ on the display unit 45 (S53).

The surgeon makes a plan for the insertion path I of the puncture needle while referring to the axial image AI ₁ displayed on the display unit 45. Surgeon the position of the lesion in the axial image AI ₁ by the input device or the like, and specifies the insertion position of the puncture needle. The setting unit 42 sets a line segment connecting the designated positions as the insertion path I (S54). The setting unit 42 sends the coordinate value of the insertion path I to the storage unit 46. The storage unit 46 stores the insertion path I (coordinate value) (S55).

  The creation unit 43 creates the viewing box V by converting the first volume data created in S52 at a predetermined scale (S56).

  The display control unit 44 displays the viewing box V created in S56 on the display unit 45, and displays the path image I ′ corresponding to the insertion path I at a position corresponding to the viewing box V (S57).

Thereafter, the surgeon advances the puncture to the subject E while referring to the axial image AI ₁ and the viewing box V showing the insertion path I.

  After a certain amount of biopsy (after inserting the puncture needle into the subject E), the X-ray CT apparatus 1 is used to confirm the puncture state (whether the puncture needle is traveling along the planned path, etc.). Performs an X-ray scan (second scan) on the subject E again to create volume data (second volume data).

  That is, as in the first scan, the X-ray generation unit 11 emits X-rays to the subject E. The X-ray detection unit 12 detects X-rays that have passed through the subject E, and acquires the detection data (S58). Note that the imaging conditions of the first scan and the second scan are the same.

  The preprocessing unit 41a performs preprocessing on the detection data acquired in S58, and creates projection data (S59). The reconstruction processing unit 41b creates second volume data by interpolating a plurality of tomographic image data created based on the projection data created in S59 (S60).

  The detecting unit 49 detects the position of the puncture needle PN based on the second volume data created in S60 (S61).

  The display control unit 44 causes the viewing box V displayed in S57 to display an image PN ′ corresponding to the puncture needle PN detected in S61 (S62).

  In the present embodiment, the configuration in which the path image I ′ and the image PN ′ are displayed in the viewing box V has been described, but the image displayed in the viewing box V is not limited to this combination. For example, the display control unit 44 can display only the image PN ′ in the viewing box V (in this case, it is not necessary to set the insertion path I). Alternatively, the display control unit 44 can display the cross-sectional position C ′ in the second embodiment and the cross-sectional position c ′ in the third embodiment in the viewing box V together with the image PN ′.

<Action and effect>
The operation and effect of this embodiment will be described.

  The X-ray CT apparatus 1 of the present embodiment has a detection unit 49. The detection unit 49 detects the puncture needle PN inserted into the subject E based on other volume data (second volume data). The display control unit 44 displays an image corresponding to the puncture needle PN on a figure (viewing box V).

  In this way, the display control unit 44 causes the viewing box V to display the image PN ′ corresponding to the puncture needle PN detected based on the other volume data. Thereby, the surgeon can easily grasp the position of the puncture needle PN in the viewing box V. Further, when the route image I ′ is displayed in the viewing box V, it is possible to easily grasp whether the puncture is performed as planned by comparing the route image I ′ and the image PN ′. (If the puncture proceeds as planned, the route image I ′ and the image PN ′ are displayed in the viewing box V so as to overlap each other). That is, the X-ray CT apparatus 1 according to the present embodiment can compare the information related to the presented puncture plan with the actual puncture state.

(Modification 1)
In the above-described embodiment, an example in which a viewing box is created so that each side has the same scale based on the shape of the volume data has been described.

  Here, a rectangular parallelepiped viewing box as shown in FIG. 4 needs to secure a wider display area in the display unit 45 than a viewing box formed in a cube. Therefore, there is a possibility that the rectangular parallelepiped viewing box cannot be displayed on the display screen due to restrictions such as the display area.

  Therefore, the creation unit 43 can also create a viewing box so that each side has a different scale based on the shape of the volume data.

  That is, when the rectangular parallelepiped volume data D is obtained, the creating unit 43 creates the XY direction and the Z direction orthogonal to the direction so that the viewing box V becomes a cube. For example, as shown in FIG. 16, when volume data D (contour portion O) having a side length in the Z direction of 200 mm with respect to a side length in the X direction and the Y direction of 100 mm is obtained, 43 is based on a predetermined scale in the X direction and Y direction (for example, 1/10) and a different scale in the Z direction (for example, 1/20), which is different from the scale in the X direction, the Y direction, and the Z direction. A viewing box V having the same side length (10 mm) is created.

(Modification 2)
The display control unit 44 can also change the scale after the viewing box V created at a certain scale is displayed on the display unit 45. In this case, the display control unit 44 also changes the scale of the route image I ′ and the like in the viewing box V based on the scale.

  The display control unit 44 can also change the display mode of the viewing box V (whether display is present, blinking / lighting switching, color change, etc.). Alternatively, the display control unit 44 displays only the display mode of the route image I ′ or the cross-sectional position C ′ (display presence / absence, switching of blinking / flashing, color change, etc.) with the viewing box V displayed. It is also possible to change.

(Modification 3)
The display control unit 44 can also display an image corresponding to the target site for biopsy in the viewing box V.

  In this modification, the setting unit 42 includes a specifying unit 42a (see FIG. 17). The specifying unit 42a specifies a target site for biopsy based on the volume data. Specifically, the specifying unit 42a detects a voxel having a CT value corresponding to the CT value of the target site (for example, a lesion) from the volume data, thereby determining the position of the target site (three-dimensional Specified as a coordinate value).

  The target part can also be specified by analyzing an MPR image based on volume data. For example, the specifying unit 42a obtains the position (coordinate value) in the X direction and the Y direction of the target part by a method such as edge detection for an axial image including the target part. The axial image is an image based on volume data. Therefore, the specifying unit 42a obtains the position (coordinate value) in the Z direction of the target part based on the volume data.

  The display control unit 44 creates an image S ′ corresponding to the target part by converting the position (three-dimensional coordinate value) of the target part at the same scale as that when the viewing box V is created. The display control unit 44 displays the created image S ′ on the viewing box V (see FIG. 18). FIG. 18 shows the viewing box V displayed on the display unit 45. FIG. 18 shows an example in which the route image I ′ is displayed together with the image S ′.

  In this way, by displaying an image corresponding to the target part in the viewing box V and combining with the above embodiments, the puncture plan and the positional relationship between the actually inserted puncture needle and the target part can be viewed. It can be easily grasped in the box V.

<Effects common to the embodiments>
According to the X-ray CT apparatus of at least one embodiment described above, the display control unit displays the viewing box on the display unit and displays information related to the puncture plan on the viewing box V. That is, the X-ray CT apparatus 1 in the present embodiment can present information related to the puncture plan.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 X-ray CT apparatus 10 Base apparatus 11 X-ray generation part 12 X-ray detection part 13 Rotating body 13a Opening part 14 High voltage generation part 15 Base drive part 16 X-ray aperture part 17 Aperture drive part 18 Data collection part 30 Bed apparatus 32 Bed drive unit 33 Bed top plate 34 Base 40 Console device 41 Processing unit 41a Preprocessing unit 41b Reconfiguration processing unit 41c Rendering processing unit 42 Setting unit 43 Creation unit 44 Display control unit 45 Display unit 46 Storage unit 47 Scan control unit 48 Control unit E Subject

Claims (10)

A setting unit for setting an insertion path of a puncture needle to the subject for an image based on volume data;
A creation unit for extracting a contour of the volume data , reducing the extracted contour, and creating a figure expressing the reduced contour ;
A display control unit that displays the image and the graphic side by side on the display unit, and displays a path image corresponding to the insertion path on the graphic;
A medical device characterized by comprising: A setting unit for setting an insertion path of a puncture needle with respect to the subject for an MPR image based on volume data;
A creation unit for extracting a contour of the volume data , reducing the extracted contour, and creating a figure expressing the reduced contour ;
A display control unit that displays the MPR image and the graphic side by side on a display unit, and displays a cross-sectional position corresponding to the MPR image in which the insertion path is set;
A medical device characterized by comprising: A setting unit for setting an insertion path of a puncture needle with respect to the subject for an MPR image based on volume data;
A creation unit for extracting a contour of the volume data , reducing the extracted contour, and creating a figure expressing the reduced contour ;
A display control unit for displaying the MPR image and the graphic side by side on the display unit, and displaying the path image corresponding to the insertion path and the cross-sectional position corresponding to the MPR image in which the insertion path is set;
A medical device characterized by comprising: The medical device according to any one of claims 1 to 3, wherein the display control unit displays a cross-sectional position corresponding to an MPR image based on another volume data different from the volume data on the graphic. . Based on the other volume data, a detection unit that detects a puncture needle inserted into the subject,
The medical device according to claim 4, wherein the display control unit displays an image corresponding to the puncture needle on the graphic.   The medical device according to claim 4, wherein the display control unit causes the display unit to display an MPR image based on the other volume data.   The medical device according to any one of claims 1 to 6, wherein the creation unit creates the figure so that each side has the same scale based on the shape of the volume data.   The medical device according to any one of claims 1 to 6, wherein the creation unit creates the figure so that each side has a different scale based on the shape of the volume data. The medical device according to any one of claims 1 to 8, wherein the creation unit creates a figure representing the reduced outline excluding the inside of the subject as the figure . The creation unit medical device according to any one of 9 claims 1, characterized in that in said figure to create a straight rectangular parallelepiped.

Images