JP5683831B2 - Medical image processing apparatus and medical image processing program - Google Patents

Description

  The present invention relates to a medical image processing apparatus that generates medical image data representing a luminal body, and a medical image processing program.

  A subject is imaged using a medical image imaging apparatus such as an X-ray CT apparatus or an MRI apparatus, and diagnosis using medical image data obtained by the imaging is performed. As a medical image for diagnosing a luminal body such as a large intestine or a blood vessel, for example, a virtual endoscopic image or a developed image is used (for example, Patent Document 1).

  The virtual endoscopic image is a virtual endoscopic image that three-dimensionally represents a surface inside a luminal body such as a large intestine or a blood vessel (hereinafter sometimes referred to as “inner wall”). A method for displaying an image using a virtual endoscopic image is called fly-through. Fly-through is a technique for observing the inner wall of a luminal body such as the large intestine or blood vessel with the same line of sight as an endoscope. By using a virtual endoscopic image, endoscopy can be simulated. However, since a virtual endoscopic image has a narrow area that can be displayed at a time, it is necessary to use a large number of virtual endoscopic images in order to make a diagnosis.

  On the other hand, according to the developed image, the inner walls of the luminal body can be listed. The developed image is an image representing a state where the lumen body is cut open. That is, the developed image is an image representing a state in which the inner wall of the lumen body is deployed, and is an image representing the inner wall of the lumen body in a planar shape. A specific example of the developed image is shown in FIG. FIG. 7A schematically shows the large intestine. FIG. 7B shows a developed image. As shown in FIG. 7A, the viewpoint 202 is set on the center line 201 of the large intestine 200. A direction perpendicular to the center line 201 from the viewpoint 202 is a line-of-sight direction 203. A virtual ray is emitted from the viewpoint 202 in the line-of-sight direction 203 (ray tracing process). An image representing the inner wall of the large intestine 200 is generated by changing the position of the viewpoint 202 on the center line 201 and radiating virtual rays from the viewpoint 202 at each position in the line-of-sight direction 203. By cutting out the generated image parallel to the center line 201, a developed image 210 that represents the inner wall of the large intestine in a planar shape as shown in FIG. 7B is generated.

  With reference to FIG. 8, the case where the luminal body to be observed is bent will be described. FIG. 8 is a diagram schematically showing a bent lumen body. As shown in FIG. 8, when the large intestine 220 to be observed is bent, a center line 221 that is bent along the large intestine 220 is set, and a direction perpendicular to the center line 221 is set as a line-of-sight direction 222. Then, an image representing the inner wall of the large intestine 220 is generated by executing the ray tracing process. In other words, an image representing the inner wall of the large intestine 220 is generated by emitting virtual rays in the line-of-sight direction 222 from each viewpoint set on the center line 221. By setting the center line 221 along the actual bent organ, a developed image representing the inner wall of the bent organ in a planar shape can be obtained.

Japanese Patent No. 4130428

  According to the developed image, the inner wall of the luminal body can be listed, so that a wide area of the luminal body can be looked over in a short time. However, in the developed image generation method according to the related art, a portion that is difficult to observe may occur depending on the bending method of the lumen body and the shape of the inner wall. For example, as shown in FIG. 8, the region 223 on the back side of the fold of the large intestine 220 is hidden behind the fold of the large intestine 220 when viewed from the line-of-sight direction 222. For this reason, the region 223 on the back side of the fold is not irradiated with a virtual ray. As a result, the area 223 on the back side of the fold is not represented in the developed image. Thus, in the method according to the prior art, it is difficult to observe the region on the back side of the protrusion such as a fold.

  In order to observe a portion that is difficult to observe in the developed image, a virtual endoscopic image may be used together. However, it generally takes time to display a virtual endoscopic image, and it is difficult to observe a wide region of the lumen body in a short time.

  The present invention solves the above-described problem, and provides a medical image processing apparatus and a medical image processing program capable of generating a developed image representing a location that is behind the inner surface of a lumen body. With the goal.

According to the first aspect of the present invention, a planar virtual deployment body in which the lumen body represented by the volume data is received by receiving volume data generated by the medical imaging apparatus and representing the lumen body is obtained. A deploying means for generating, an inclining means for dividing the virtual deployable body into a plurality of unit deployable bodies and tilting the directions of the plurality of unit deployable bodies around a predetermined axis as a rotation axis ; and a virtual viewpoint inside the lumen body By developing ray tracing processing by irradiating a virtual ray from the virtual viewpoint to the plurality of unit development bodies in an inclined state, development image data representing the inner surface of the lumen body is obtained. And a medical image processing apparatus.
According to an eighth aspect of the present invention, the computer receives volume data generated by a medical imaging apparatus and representing a luminal body, and is a planar virtual image in which the luminal body represented by the volume data is developed. A deployment function for generating a deployment body, a tilt function for dividing the virtual deployment body into a plurality of unit deployment bodies, and tilting the directions of the plurality of unit deployment bodies around a predetermined axis as a rotation axis, and an interior of the lumen body A virtual viewpoint is set to the plurality of unit developed bodies in a tilted state, and a virtual ray is irradiated from the virtual viewpoint to perform ray tracing processing, thereby developing the inner surface of the lumen body. And a medical image processing program for executing an image generation function for generating image data.

  According to the present invention, the virtual deployment body in a state where the lumen body is cut open is divided into a plurality of unit deployment bodies, and the ray tracing process is performed by tilting the directions of the plurality of unit deployment bodies. Thus, it is possible to irradiate a virtual ray from an oblique direction. As a result, it is possible to irradiate a virtual ray to a location that is behind the inner surface of the lumen body. As a result, it is possible to generate developed image data that represents a portion that is behind the inner surface.

1 is a block diagram illustrating a medical image processing apparatus according to an embodiment of the present invention. It is a perspective view which shows a part of lumen body typically. It is a perspective view which shows a virtual expansion body typically. It is a figure which shows a virtual expansion body typically. It is a perspective view which shows typically the virtual expansion body which concerns on a modification. It is a figure which shows typically the virtual expansion | deployment body which concerns on a modification. FIG. 7A is a diagram schematically showing the large intestine, and FIG. 7B is a diagram showing a developed image. It is a figure which shows the bent lumen body typically.

  A medical image processing apparatus according to an embodiment of the present invention will be described with reference to FIG. For example, a medical image photographing apparatus 90 is connected to the medical image processing apparatus 1 according to this embodiment.

(Medical image capturing device 90)
As the medical image capturing apparatus 90, an image capturing apparatus such as an X-ray CT apparatus or an MRI apparatus is used. The medical image photographing device 90 generates medical image data by photographing a photographing region including an observation target. For example, the medical image photographing apparatus 90 generates volume data by photographing a three-dimensional photographing region. An example of an observation object is a luminal body. The lumen body includes a tubular tissue and a bag-shaped tissue. An example of the tubular tissue is the large intestine, blood vessels, and bronchi. An example of a bag-like tissue is the stomach. For example, when the tubular tissue is an observation target, the medical image capturing apparatus 90 generates volume data representing the imaging region including the tubular tissue by capturing the imaging region including the tubular tissue.

  For example, an X-ray CT apparatus as the medical image capturing apparatus 90 generates CT image data in a plurality of cross sections having different positions by capturing a three-dimensional capturing region. The X-ray CT apparatus generates volume data using a plurality of CT image data. When the large intestine is an observation target as an example of the tubular tissue, the X-ray CT apparatus generates volume data representing an imaging region including the large intestine by imaging a three-dimensional imaging region including the large intestine. The medical image photographing device 90 outputs the volume data to the medical image processing device 1. Hereinafter, the large intestine will be described as an example of an observation target.

(Medical image processing apparatus 1)
The medical image processing apparatus 1 includes an image storage unit 2, a specifying unit 3, a core line calculating unit 4, a developing unit 5, a tilting unit 6, an image generating unit 7, a display control unit 8, a user interface (UI). 9).

(Image storage unit 2)
The image storage unit 2 stores medical image data output from the medical image photographing device 90. For example, the image storage unit 2 stores volume data representing an imaging region including the large intestine.

  The medical image processing apparatus 1 may generate volume data without the medical image capturing apparatus 90 generating volume data. In this case, the medical image photographing apparatus 90 outputs a plurality of medical image data (for example, CT image data) to the medical image processing apparatus 1. The medical image processing apparatus 1 receives a plurality of medical image data generated by the medical image photographing apparatus 90. The image storage unit 2 stores a plurality of medical image data. The image generation unit 7 reads a plurality of medical image data from the image storage unit 2 and generates volume data based on the plurality of medical image data. The image storage unit 2 stores the volume data generated by the image generation unit 7.

(Specific part 3)
The specifying unit 3 reads volume data from the image storage unit 2 and specifies a lumen body from the volume data based on a pixel value such as a CT value. The lumen body specified by the specifying unit 3 is shown in FIG. FIG. 2 is a perspective view schematically showing a part of the lumen body. When the large intestine is to be observed, as illustrated in FIG. 2, the specifying unit 3 specifies the large intestine 100 as a luminal body from the volume data.

(Core wire calculation unit 4)
The core wire calculation unit 4 obtains the position of the core wire of the lumen body. When the large intestine is an observation target, the core wire calculation unit 4 obtains a line passing through the center of the large intestine 100 along the longitudinal direction of the large intestine 100 as the core.

(Development part 5)
The deployment unit 5 generates a planar virtual deployment body in which the inner surface (inner wall) of the lumen body is developed by cutting the lumen body along the core line. When the large intestine is an observation target, as illustrated in FIG. 2, the development unit 5 cuts the large intestine 100 to generate a planar virtual development body 110 in which the inner surface (inner wall 111) of the large intestine 100 is developed. . In the example illustrated in FIG. 2, the developing unit 5 generates a planar virtual deployable body 110 by opening a part of the large intestine 100. The expansion unit 5 may generate a virtual expanded body of the entire region by cutting out the entire region of the large intestine 100, or by virtually expanding a partial region of the large intestine 100 by cutting out a partial region of the large intestine 100. You may generate a body. For example, the operator may specify an area using the operation unit 11. When an area is designated by the operator, coordinate information indicating the position of the area is output from the user interface (UI) 9 to the developing unit 5. The expansion unit 5 generates a virtual expansion body by opening an area specified by the operator.

  As an example, the virtual deployment body has the same thickness as the wall thickness of the lumen body. For example, the virtual deployment body 110 has the same thickness as the thickness (wall thickness) between the inner wall 111 and the outer wall of the large intestine 100.

(Inclined part 6)
The inclination part 6 divides | segments a virtual expansion body into a some unit expansion body, and inclines the direction of a some unit expansion body with respect to a core wire. For example, the inclined portion 6 divides the virtual deployment body into a plurality of unit deployment bodies along a division plane substantially orthogonal to the core line of the lumen body, and tilts the directions of the plurality of unit deployment bodies with respect to the core line.

  With reference to FIG.3 and FIG.4, the process of the inclination part 6 is demonstrated. FIG. 3 is a perspective view schematically showing the virtual deployment body. FIG. 4 is a diagram schematically illustrating the virtual deployment body, as viewed from a direction orthogonal to the direction along the core line and the direction of the wall thickness. Fig.4 (a) is a figure which shows the state before inclining a unit expansion body. FIG.4 (b) is a figure which shows the state after inclining a unit expansion body.

  The virtual deployment body 110 illustrated in FIGS. 3 and 4 schematically illustrates the virtual deployment body generated by the deployment unit 5. As an example, coordinates are defined by a three-dimensional orthogonal coordinate system. This orthogonal coordinate system includes an X-direction axis (X-axis), a Y-direction axis (Y-axis), and a Z-direction axis (Z-axis). The direction along the core line 101 of the large intestine 100 is defined as the Y direction, and the thickness (wall thickness) direction of the virtual deployment body 110 is defined as the X direction. For example, as shown in FIG. 3 and FIG. 4A, the inclined portion 6 has a virtual deployable body 110 at a predetermined interval along a dividing plane substantially orthogonal to the direction of the core of the large intestine 100 (Y direction). Is divided into a plurality of unit expansion bodies 120.

  The distance value at the predetermined interval is stored in advance in a storage unit (not shown). For example, the operator may input a distance at a predetermined interval through the operation unit 11. The distance value at a predetermined interval input from the operation unit 11 is stored in a storage unit (not shown). The inclined unit 6 divides the virtual deployment body 110 into a plurality of unit deployment bodies 120 according to a distance of a predetermined interval stored in the storage unit.

  Note that the inclined portion 6 may divide the virtual deployment body 110 into a plurality of unit deployment bodies 120 along a division plane that is inclined with respect to a plane orthogonal to the direction of the core wire 101 (Y direction). For example, the operator inputs the angle of the division plane using the operation unit 11. The inclined unit 6 sets a division plane according to the angle input from the operation unit 11 and divides the virtual deployment body 110 into a plurality of unit deployment bodies 120.

  The inclined portion 6 inclines the directions of the plurality of unit deployment bodies 120 with respect to the core wire 101. For example, as shown in FIG. 4B, the inclined portion 6 has a preset inclination with the Z direction orthogonal to the direction along the core wire 101 (Y direction) and the wall thickness direction (X direction) as the rotation axis. The plurality of unit deploying bodies 120 are tilted to the position of the tilt angle set in advance in the direction. As a result, the plurality of unit deployment bodies 120 are inclined with respect to the wall thickness direction (X direction) of the virtual deployment body 110 before being tilted.

  Information indicating the inclination direction and the value of the inclination angle are stored in advance in a storage unit (not shown). For example, the operator may input information indicating the tilt direction and the value of the tilt angle using the operation unit 11. Information indicating the tilt direction and the value of the tilt angle input by the operator are stored in a storage unit (not shown). The inclination part 6 inclines the several unit expansion body 120 according to the information which shows the inclination direction memorize | stored in the memory | storage part, and the value of an inclination angle.

(Image generation unit 7)
The image generation unit 7 reads volume data from the image storage unit 2 and generates developed image data that represents the inner surface (inner wall) of the lumen body in a planar shape based on the volume data. For example, the image generation unit 7 sets a virtual viewpoint inside the lumen body. The image generation unit 7 performs ray tracing processing by irradiating a virtual ray from a virtual viewpoint. The image generation unit 7 generates developed image data representing the inner wall of the lumen body in a planar shape by performing ray tracing processing. The image generation unit 7 outputs the developed image data to the display control unit 8.

  For example, the image generation unit 7 sets a virtual viewpoint on the core wire 101. As illustrated in FIG. 4B, the image generation unit 7 performs ray tracing processing by irradiating a plurality of unit development bodies 120 with parallel virtual rays 102 (parallel rays) from a virtual viewpoint. The image generation unit 7 generates developed image data representing the inner wall 111 of the large intestine 100 in a planar shape by performing ray tracing processing. In the example illustrated in FIG. 4B, the image generation unit 7 irradiates a plurality of unit development bodies 120 with virtual light rays 102 (parallel light rays) parallel to the wall thickness direction (X direction) of the virtual development body 110. Perform ray tracing. The plurality of unit development bodies 120 are inclined in the wall thickness direction (X direction). Therefore, the virtual light beam 102 (parallel light beam) irradiated in parallel to the wall thickness direction (X direction) is irradiated to the plurality of unit development bodies 120 from an oblique direction. That is, the virtual light beam 102 is obliquely applied to the inner wall 111 of the large intestine 100 (virtual deployment body 110). As a result, developed image data in which the inner wall 111 is viewed from an oblique direction is generated.

  The image generation unit 7 may generate virtual endoscopic image data that three-dimensionally represents the inner wall of the lumen body by performing volume rendering on the volume data. Further, the image generation unit 7 may generate MPR image data in an arbitrary cross section by performing MPR (Multi Planar Reconstruction) processing on the volume data.

(Display control unit 8)
The display control unit 8 receives the developed image data from the image generation unit 7 and causes the display unit 10 to display a developed image based on the developed image data.

(User interface (UI) 9)
The user interface (UI) 9 includes a display unit 10 and an operation unit 11. The display unit 10 includes a monitor such as a CRT or a liquid crystal display. The operation unit 11 includes an input device such as a keyboard and a mouse.

  According to the medical image processing apparatus 1 having the above configuration, a ray tracing process is performed on a plurality of unit deployment bodies 120 in an inclined state, thereby obliquely forming the inner wall 111 of the large intestine 100 (virtual deployment body 110). Virtual rays 102 (parallel rays) can be irradiated from the direction. As a result, it is possible to irradiate the virtual light beam 102 to a location behind the inner wall 111 of the large intestine 100. As a result, it is possible to generate developed image data that represents a location that is behind the inner wall 111. That is, according to the medical image processing apparatus 1 according to this embodiment, it is possible to generate developed image data in a state where the inner wall 111 of the large intestine 100 is viewed from an oblique direction. Since the plurality of unit deployment bodies 120 are inclined obliquely with respect to the virtual light beam 102, for example, the virtual light beam 102 can be irradiated to a location behind the fold of the large intestine 100. As a result, it is possible to generate developed image data that represents the location behind the folds. As a result, the operator can observe a portion that is behind a protrusion such as a fold.

  Conventionally, developed image data in a state viewed from a direction orthogonal to the inner wall 111 has been generated. For this reason, a virtual ray (parallel ray) is not irradiated on the shaded portion of the inner wall 111, and the developed image data representing the shaded location cannot be generated. As a result, it is difficult for the operator to observe the shadowed portion. On the other hand, according to the medical image processing apparatus 1 according to this embodiment, since the virtual light beam 102 can be irradiated to a portion that is behind the inner wall 111 of the large intestine 100, the operator is in the shadow. It is possible to observe the location.

(Modification)
A modification of the medical image processing apparatus 1 will be described with reference to FIGS. 5 and 6. FIG. 5 is a perspective view schematically showing a virtual deployment body according to a modification. FIG. 6 is a diagram schematically illustrating a virtual deployment body according to a modification, and is a diagram seen from a direction along the core line. Fig.6 (a) is a figure which shows the state before inclining a unit expansion body. FIG.6 (b) is a figure which shows the state after inclining a unit expansion body.

(Development part 5)
As described above, the deployment unit 5 cuts the large intestine 100 to generate a planar virtual deployment body in which the inner surface (inner wall 111) of the large intestine 100 is developed.

  A virtual deployment body 130 illustrated in FIGS. 5 and 6 schematically illustrates a virtual deployment body generated by the deployment unit 5. The direction along the colon 101 of the large intestine is the Y direction, and the thickness (wall thickness) direction of the virtual deployment body 130 is the X direction.

(Inclined part 6)
For example, as shown in FIG. 5 and FIG. 6A, the inclined portion 6 has a virtual deployable body 130 at a predetermined interval along a divided surface substantially parallel to the direction of the core line (Y direction) of the large intestine 100. Is divided into a plurality of unit expansion bodies 140. As an example, the inclined portion 6 is configured so that the virtual deployable body 130 is formed into a plurality of unit deployable bodies 140 along a split surface that is substantially parallel to the direction of the core wire (Y direction) and substantially parallel to the wall thickness direction (X direction). To divide. The inclined portion 6 divides the virtual deployment body 130 into a plurality of unit deployment bodies 1440 along a division plane that is substantially parallel to the direction of the core wire (Y direction) and is inclined with respect to the wall thickness direction (X direction). May be.

  The inclined portion 6 may divide the virtual deployment body 130 into a plurality of unit deployment bodies 140 along a split surface that is inclined with respect to a plane parallel to the direction of the core wire 101 (Y direction). For example, the operator inputs the angle of the division plane using the operation unit 11. The inclined unit 6 sets a division plane according to the angle input from the operation unit 11, and divides the virtual deployment body 130 into a plurality of unit deployment bodies 140.

  The inclined portion 6 inclines the directions of the plurality of unit deployment bodies 140 with respect to the core wire 101. For example, as shown in FIG. 6B, the inclined portion 6 has a direction along the core wire 101 (Y direction) as a rotation axis, and is set at a position of an inclination angle set in advance toward a preset inclination direction. The plurality of unit expansion bodies 140 are tilted. As a result, the plurality of unit development bodies 140 are inclined with respect to the wall thickness direction (X direction) of the virtual development body 130 before being inclined.

  Information indicating the inclination direction and the value of the inclination angle are stored in advance in a storage unit (not shown). For example, the operator may input information indicating the tilt direction and the value of the tilt angle using the operation unit 11. Information indicating the tilt direction and the value of the tilt angle input by the operator are stored in a storage unit (not shown). The inclination part 6 inclines the some unit expansion body 140 according to the information which shows the inclination direction memorize | stored in the memory | storage part, and the value of an inclination angle.

(Image generation unit 7)
For example, the image generation unit 7 sets a virtual viewpoint on the core wire 101. As illustrated in FIG. 6B, the image generation unit 7 performs ray tracing processing by irradiating a plurality of unit development bodies 140 with parallel virtual rays 102 (parallel rays) from a virtual viewpoint. The image generation unit 7 generates developed image data representing the inner wall 111 of the large intestine 100 in a planar shape by performing ray tracing processing. In the example illustrated in FIG. 6B, the image generation unit 7 irradiates a plurality of unit development bodies 140 with virtual light rays 102 (parallel light rays) parallel to the wall thickness direction (X direction) of the virtual development body 130. Perform ray tracing. The plurality of unit developed bodies 140 are inclined in the wall thickness direction (X direction). Therefore, the virtual ray 102 irradiated in parallel to the wall thickness direction (X direction) is irradiated to the plurality of unit development bodies 140 from an oblique direction. That is, the virtual light beam 102 is obliquely applied to the inner wall 111 of the large intestine 100 (virtual deployment body 130). As a result, developed image data in which the inner wall 111 is viewed from an oblique direction is generated.

  The image generation unit 7 outputs the developed image data to the display control unit 8. The display control unit 8 causes the display unit 10 to display a developed image based on the developed image data.

  As described above, according to the modified example of the medical image processing apparatus 1, the ray tracing process is performed on the plurality of unit deployment bodies 140 in an inclined state, whereby the inner wall 111 of the large intestine 100 (virtual deployment body 130) is applied. The virtual light beam 102 (parallel light beam) can be irradiated from an oblique direction. As a result, it is possible to irradiate the virtual light beam 102 to a location behind the inner wall 111 of the large intestine 100. As a result, it is possible to generate developed image data that represents a location that is behind the inner wall 111.

  The specifying unit 3, the core wire calculating unit 4, the developing unit 5, the tilting unit 6, the image generating unit 7, and the display control unit 8 are each a processing device (not shown) such as a CPU, GPU, or ASIC, and a ROM , A RAM, or a storage device (not shown) such as an HDD. The storage device stores a specific program for executing the function of the specifying unit 3. The storage device stores a core wire calculation program for executing the function of the core wire calculation unit 4. The storage device stores a development program for executing the functions of the development unit 5. The storage device stores an inclination program for executing the function of the inclination portion 6. The storage device stores an image generation program for executing the function of the image generation unit 7. The storage device stores a display control program for executing the functions of the display control unit 8. A processing device such as a CPU executes each program stored in the storage device, so that the function of each unit is executed.

  The medical image photographing device 90 may have the function of the medical image processing device 1. In this case, the medical image photographing device 90 generates volume data by photographing the lumen body, and further executes the function of the medical image processing device 1. Thereby, the medical image photographing device 90 generates developed image data in which the lumen body is developed in a planar shape. As described above, even when the medical image capturing apparatus 90 executes the function of the medical image processing apparatus 1, the same effect as the medical image processing apparatus 1 can be obtained.

DESCRIPTION OF SYMBOLS 1 Medical image processing apparatus 2 Image memory | storage part 3 Specification part 4 Core wire calculation part 5 Expansion | deployment part 6 Inclination part 7 Image generation part 8 Display control part 9 User interface (UI)
DESCRIPTION OF SYMBOLS 10 Display part 11 Operation part 90 Medical imaging device 100 Large intestine 101 Core wire 110,130 Virtual expansion body 111 Inner wall 120,140 Unit expansion body

Claims (8)

Deployment means for receiving volume data representing a luminal body generated by the medical imaging apparatus and generating a planar virtual deployment body in which the luminal body represented in the volume data is deployed ;
Inclining means for dividing the virtual deployment body into a plurality of unit deployment bodies and tilting the plurality of unit deployment bodies around a predetermined axis as a rotation axis ;
A virtual viewpoint is set inside the lumen body, and ray tracing processing is performed by irradiating a virtual ray from the virtual viewpoint to the plurality of unit deployment bodies in an inclined state, thereby performing a ray tracing process on the lumen body. Image generating means for generating developed image data representing the internal surface;
A medical image processing apparatus. The medical image processing apparatus according to claim 1, wherein the unit development body is planar. A core wire calculating means for obtaining a core wire of the lumen body;
The deployment means generates the virtual deployment body by cutting the lumen body along the core line ,
Before Symbol image generating unit sets the virtual viewpoint onto the core wire, the ray tracing processing by irradiating said parallel virtual ray from the virtual viewpoint with respect to the plurality of units deployable body of tilted state by performing medical image processing apparatus according to claim 1 or 2 to generate the expanded image data. The tilt means, according to claim 3, the virtual deployable body divided into a plurality of units deployable body along a plane substantially orthogonal to the core wire, tilting the orientation of the plurality of units deployable body relative to the core wire Medical image processing apparatus. The tilt means, according to claim 3, the virtual deployable body divided into a plurality of units deployable body along a plane substantially parallel to the core wire, tilting the orientation of the plurality of units deployable body relative to the core wire Medical image processing apparatus. The medical image processing apparatus according to claim 1, further comprising display means for displaying a developed image based on the developed image data. It further has an operation means for inputting a distance and an inclination angle of a predetermined interval,
The tilting means is
Dividing the virtual deployment body into the plurality of unit deployment bodies according to the distance of the predetermined interval input from the operation means;
The plurality of unit deployment bodies are tilted according to the tilt angle input using the operation means.
The medical image processing apparatus according to any one of claims 1 to 6. On the computer,
A deployment function that receives volume data generated by a medical imaging apparatus and represents a luminal body, and generates a planar virtual deployment body in which the luminal body represented in the volume data is deployed ;
An inclination function that divides the virtual deployment body into a plurality of unit deployment bodies and tilts the plurality of unit deployment bodies around a predetermined axis as a rotation axis ;
A virtual viewpoint is set inside the lumen body, and ray tracing processing is performed by irradiating a virtual ray from the virtual viewpoint to the plurality of unit deployment bodies in an inclined state, thereby performing a ray tracing process on the lumen body. An image generation function for generating developed image data representing the internal surface;
A medical image processing program for executing

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