JP2003245360A - Stent design supporting apparatus, stent design supporting method, stent design supporting program, and recording medium with stent design supporting program recorded thereon - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable to intuitively grasp the shape of a stent, and to design a stent model which matches the shape of an anatomical body tubular cavity of each patient while a relation to the peripheral organs is taken under consideration. <P>SOLUTION: A body axis tomographic image which is formed based on a three- dimensional tomographic image of a patient is displayed on a monitor (S2). Then, selected points are designated on an anatomical body tubular cavity where a stent is made to reside and which is displayed on the body axis tomographic image (S3). Then, a multi-directional reconstructed image (MPR) is displayed on the monitor (S6), and on the MPR, the selected points, an interpolating point which interpolates the selected points, and a central axis L for a stent model which connects respective points are displayed (S8). Then, an operator performs a correction in such a manner that the central axis L may match the center of the anatomical body tubular cavity by moving the central axis L on the MPR (S9). Then, a cylindrical stent model with the central axis L as a center is displayed on the anatomical body tubular cavity (S10), and at the same time, a three-dimensional image is displayed (S11). <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stent design support device, a stent design support method, and a stent design support method for supporting the design of a stent model adapted to the shape of the anatomical body lumen of an individual patient.
The present invention relates to a stent design support program and a recording medium recording the stent design support program.

[0002]

BACKGROUND OF THE INVENTION As is well known, a stent is a tubular device that has the function of holding a portion of an anatomical body lumen such as a blood vessel open. Artificial blood vessel indwelling surgery using a stented artificial blood vessel (stent graft) prevents the aneurysm from rupturing by pressing the artificial blood vessel (graft) from the artery to the arterial wall instead of replacing the aneurysm with an artificial blood vessel. This is an operation method that is performed, and has the advantage of less invasion to the patient compared to tube surgery.

[0003] A stent or a stent graft generally has a tubular structure such as a mesh shape or a coil shape made of a metal wire, which can be reduced in diameter. After being inserted, the diameter of the blood vessel is expanded and placed so as to mechanically support the lumen of the blood vessel at the narrowed portion.

Since the stent or the stent graft is not fixed by being sutured to the wall of the blood vessel, it is desirable to accurately design the shape of the anatomical body lumen for each patient. When designing a stent or a stent-graft, at present, it is mainly necessary to cut out a required tomographic image from a CT image obtained from a patient and perform measurement on the image to obtain data necessary for designing the stent or the stent-graft. ing.

However, it is inaccurate to estimate the length of a blood vessel that is bent to 90 degrees due to aneurysm or the length of a stent or a stent graft that runs in a swollen aneurysm, using only the cut section. .

Further, it is difficult to intuitively understand how a stent or stent graft designed from a CT image runs in a blood vessel.

Therefore, for example, Japanese Patent Laid-Open No. 2001-7909
Japanese Unexamined Patent Publication 7 discloses a technique for designing a stent-graft model while three-dimensionally visually recognizing a state where the stent-graft is left in the blood vessel.

[0008]

However, in the above-mentioned prior art, the target blood vessel region is extracted from the CT image,
Since the stent graft model suitable for the extracted blood vessel is designed, it is impossible to design the stent graft model in consideration of the relationship with other organs. That is, for example, when a blood vessel has a bulging bulge and an attempt is made to design a stent graft to be placed in the bulge, it is difficult to estimate the original shape of the blood vessel from the bulge alone.

Further, since the design object is limited to the stent graft which is composed of the graft and the shape memory alloy ring (stent) which is arranged on the outer periphery of the graft at an arbitrary interval, the monitor is designed. Since the ring arrangement is only displayed on the blood vessel, it is difficult to intuitively grasp the shape of the stent graft. Further, it cannot be applied to the design of an ordinary cylindrical stent, and there is a problem that it lacks versatility.

Therefore, the object of the present invention is to intuitively grasp the shape of the stent, and to adapt it to the shape of the anatomical body lumen of each patient while considering the relationship with the surrounding organs. An object of the present invention is to provide a stent design support device, a stent design support method, a stent design support program, and a recording medium recording the stent design support program, which is capable of supporting the design of a stent model.

[0011]

In order to achieve the above object, a first aspect of the present invention is to generate a multidirectional reconstruction image of a patient based on a three-dimensional tomographic image obtained from the patient,
Means for designating a plurality of arbitrary selection points on the anatomical body lumen displayed in the multidirectional reconstructed image, and selecting the selection points based on the designated selection points and a preset curve function Means for setting a central axis for the stent model to pass therethrough, means for correcting the central axis for the stent model in the axial center direction of the anatomical body lumen, and the anatomical body with the central axis for the stent model as the center Means for generating an outline of a stent model placed on the anatomical body lumen on the lumen;
Means for displaying the anatomical body lumen and the stent model indwelling in the anatomical body lumen as a stereoscopic image, and means for correcting the outline of the stent model on the multidirectional reconstructed image And means for automatically correcting the outline of the stent model displayed in the stereoscopic image in conjunction with the outline of the stent model displayed on the multidirectional reconstructed image. The present invention provides a stent design support device that does.

According to a second aspect of the present invention, in the first aspect, the multidirectional reconstructed image is composed of three tomographic images of a body axis tomographic image, a sagittal tomographic image and a coronal tomographic image. The present invention provides a characteristic stent design support device.

A third aspect of the present invention provides the stent design support apparatus according to the second aspect, wherein the selection point is designated on the body axis tomographic image.

A fourth aspect of the present invention is to confirm whether or not the completed stent model can be placed in the anatomical body lumen in any one of the first to third aspects. The present invention provides a stent design support device characterized by comprising means.

A fifth aspect of the present invention is the step of generating a multi-directional reconstructed image of the patient based on a three-dimensional tomographic image obtained from the patient, and the anatomical body displayed in the multi-directional reconstructed image. A step of designating a plurality of arbitrary selection points on the lumen, a step of setting a stent model central axis passing through the selection points based on the specified selection points and a preset curve function; and the stent model Correcting the central axis for use in the axial center direction of the anatomical body lumen, and a stent left in the anatomical body lumen centered on the central axis for the stent model A step of generating a contour line of the model; a step of displaying the anatomical body lumen and the stent model indwelling in the anatomical body lumen as a stereoscopic image; and a contour line of the stent model Modifying on a multi-directional reconstructed image And a step of automatically correcting the outline of the stent model displayed on the stereoscopic image in conjunction with the outline of the stent model displayed on the multidirectional reconstructed image. The present invention provides a method for supporting stent design.

A sixth aspect of the present invention comprises a step of confirming in the fifth aspect whether or not the completed stent model can be placed in the anatomical body lumen. The present invention provides a stent design support method characterized by the above.

A seventh aspect of the present invention is to generate a multi-directional reconstructed image of the patient based on a three-dimensional tomographic image obtained from the patient, and an anatomical body displayed in the multi-directional reconstructed image. Specifying a plurality of arbitrary selection points on the lumen, setting a stent model central axis passing through the selection points based on the specified selection points and a preset curve function, and the stent model A central axis for use in the axial center direction of the anatomical body lumen, and a stent to be placed in the anatomical body lumen centered on the central axis for the stent model Generating a contour line of the model; displaying the anatomical body lumen and the stent model indwelling in the anatomical body lumen as a stereoscopic image; Multi-directional And correcting on the configuration image,
A step of automatically correcting the contour line of the stent model displayed on the stereoscopic image in association with the contour line of the stent model displayed on the multidirectional reconstructed image. It provides a stent design support program.

An eighth aspect of the present invention is to generate a multi-directional reconstructed image of the patient based on a three-dimensional tomographic image obtained from the patient, and an anatomical body displayed in the multi-directional reconstructed image. Specifying a plurality of arbitrary selection points on the lumen, setting a stent model central axis passing through the selection points based on the specified selection points and a preset curve function, and the stent model A central axis for use in the axial center direction of the anatomical body lumen, and a stent to be placed in the anatomical body lumen centered on the central axis for the stent model A step of generating a contour line of the model; a step of displaying the anatomical body lumen and the stent model indwelling in the anatomical body lumen as a stereoscopic image; and a contour line of the stent model Multi-directional And correcting on the configuration image,
A step of automatically correcting the contour line of the stent model displayed on the stereoscopic image in association with the contour line of the stent model displayed on the multidirectional reconstructed image. The present invention provides a recording medium storing a computer-readable stent design support program.

According to the above-mentioned first, fifth, seventh and eighth inventions, the stent model is designed while displaying the stent model on the anatomical body lumen displayed in the multidirectional reconstruction image. In addition, when the stent model is displayed as a stereoscopic image in the design process and corrections are made in the multidirectional reconstructed image, the stereoscopic image is automatically corrected in conjunction with it, so the shape of the stent can be intuitively determined. It becomes possible to grasp, and it is possible to design a stent model that fits the shape of the anatomical body lumen of an individual patient while considering the relationship with the surrounding organs.

According to the second aspect of the invention, the multidirectional reconstructed image is composed of three tomographic images of a body-axis tomographic image, a sagittal tomographic image, and a coronal tomographic image. It can be done efficiently.

Furthermore, according to the third aspect of the present invention, the selection point can be specified easily and reliably by specifying the selection point on the body axis tomographic image.

Furthermore, according to the fourth and sixth inventions, the design of the stent is confirmed by confirming whether or not the completed stent model can be placed in the anatomical body lumen. Work can be done quickly and accurately.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration diagram of a stent design support device.

Reference numeral 1 in the figure is a three-dimensional image diagnostic apparatus such as a CT (Computed Tomography) apparatus, an MRI (Nuclear Magnetic Resonance Imaging) apparatus and an ultrasonic imaging apparatus. This three-dimensional image diagnostic apparatus is used for X (width direction), Y (abdominal direction), Z of a patient.
It operates in the (height direction) direction to acquire a three-dimensional tomographic image of the patient, and transmits the acquired three-dimensional tomographic image data to the stent design support device 2.

The stent design support device 2 uses the acquired three-dimensional tomographic image to reconstruct a multidirectional image (hereinafter referred to as "MPR").
(Multi | -Planar Reconstruction image) ”is created.

The stent design support apparatus 2 includes a computer 2a such as a microcomputer, and the computer 2a is connected with peripheral devices such as a monitor 2b, a keyboard 2c and a mouse 2d. Further, the computer 2a is provided with a CPU that controls the system as a whole, a recording medium such as a memory and a hard disk, and a communication device such as a modem and a terminal adapter.

The recording medium stores an OS (operating system), an MPR processing program, a blood vessel center axis determination program, a stent design program, and the like, and also stores information such as three-dimensional image data of each patient. A database for

In the stent design support device 2, MPR is calculated based on the patient's three-dimensional image data acquired by the three-dimensional image diagnostic device 1 according to the program stored in the CPU.
To create a stent model representing the shape of the stent to be placed in the aortic arch based on this MPR, and based on this stent model, for forming a stent such as the diameter of each part, the stent length, the bending angle, the twist, etc. The three-dimensional shape data is acquired, and this three-dimensional shape data is output to the NC machine terminal 4.

The NC processing machine terminal 4 converts the inputted three-dimensional shape data into NC processing numerical data and outputs the data to the NC processing machine 5. In the NC processing machine 5, based on the inputted numerical data for processing, the stent 21b that conforms to the shape of the anatomical lumen of the patient (see FIG. 10 (b)).
For forming a stent 30 for molding a stent (see FIG. 12)
To create.

As shown in FIG. 10A, the stent 21
The a is formed in a cylindrical shape by braiding a plurality of filaments, etc., and has a straight shape before the heat treatment. The straight stent 21a is constrained by the stent molding die 30 and then subjected to heat treatment so that the stent 2 is shaped into a shape that matches the shape of the anatomical body lumen of the patient.
1b is formed (see FIG. 2B). Further, as shown in FIG. 3C, a stent graft 23 which has been subjected to a graft treatment for covering the graft (artificial blood vessel) 22 is formed on the outer circumference (or inner circumference) of the stent 21b, if necessary. still,
As the material of the stent 21a, a shape memory alloy that is remarkably provided with a shape memory effect by heat treatment is preferably used, but stainless steel, tantalum, titanium, platinum, gold, tungsten, or the like may be used depending on the application. Shape memory alloys include Ni-Ti series, Cu-Al-Ni
System, Cu-Zn-Al system and the like are preferably used. Further, the surface of the shape memory alloy may be coated with gold, platinum, or the like by a means such as plating.

Next, the procedure for calculating the three-dimensional shape data of the stent processed by the CPU of the stent design support apparatus 2 will be described in accordance with the three-dimensional shape data calculation routine shown in FIGS. In the following, the creation of a stent model representing the shape of the stent to be inserted and left in the aortic arch will be described as an example. Also, at each step. Steps surrounded by thin lines indicate processes performed by the CPU, and steps surrounded by thick lines indicate processes performed by the operator.

When the operator inputs the patient's examination ticket number (ID) and patient name in the ID input box and patient name input box displayed on the initial screen displayed on the monitor 2b, in step S1 , Search the database and read the corresponding 3D image data of the patient.

Next, in step S2, the monitor 2b
In addition, the axial tomographic image (Axi
al) is displayed. As shown in FIG. 5, an operation window 10 and an image window 11 are displayed on the monitor 2b, and a body axis tomographic image of the patient is displayed in the image window 11. Further, the operation support frame 1 in which a message for supporting the operation is displayed in the operation window 10.
0a, a wide control bar (WW: Windows Width) for setting the display width of the image window 11, a level bar (WL: Windw Level) for setting the brightness and contrast of the displayed image, and a horizontal display for the image window 11. An image control bar (Image) that scrolls the tomographic image, images that are arranged in layers are opened sequentially from the lower layer to the upper layer or from the upper layer to the lower layer, and the "Return>" button, "Next>" button, etc. There is.

Although not shown, on the initial screen, the operator inputs the name of the desired body lumen (aortic arch in this embodiment) or a plurality of bodies displayed on the screen. When the name of the lumen is selected, the operation support frame 10a displayed at the top of the operation window 10 is displayed.
In the field, a part that needs to be specified when creating a stent model and a comment that specifies a tomographic image to be displayed for that purpose are displayed.

The comment displayed first in the operation support frame 10a is "Please set the slice at the root of the ascending aorta and click the centers of the ascending aorta and the descending aorta." In step S3, in accordance with the instruction displayed on the operation support frame 10a, the "<Back" button or the "Next>" button displayed at the bottom of the operation window 10 is selectively clicked,
The designated body axis tomographic image is displayed, the mouse 2d or the like is operated, the pointer is moved to the center of the ascending aorta and the descending aorta, and then clicked to confirm the selection points P1 and P2. Note that this selection point P1. P2 serves as a reference point when creating a stent model representing the shape of the stent, but since it can be corrected later on the multidirectional reconstructed image, it is not necessary to specify an accurate position.

Next, in step S4, it is checked whether or not there is a next body-axis tomographic image. If there is a next body-axis tomographic image, the process branches to step S5. Whether the next body axis tomographic image exists is determined by whether or not the operator has clicked the "Next>" button. If the "Next>" button has been clicked, the next body axis tomographic image is displayed. It is determined that the image exists, and the process branches to step S5.

By the way, when the operator clicks the "Next>" button, the body axis tomographic images displayed in the image window 11 are switched. At the same time, as shown in FIG. 6, the operation support frame 10a is set to “slice of aortic arch,
Click on the apex of the aortic arch. Message is displayed. The operator clicks the "Back>" button or the "Next>" button to display the specified image,
The image is displayed in the image window 11 (step S5).

Then, returning to step S3, the mouse 2d or the like is operated to move the pointer to the apex of the aortic arch portion of the body axis tomographic image displayed in a predetermined manner, and then clicked to confirm the selected point P3. Since this selection point P3 can also be corrected on the multi-directional reconstructed image described later, it is not necessary to specify an accurate position.

Then, when the designation of the selection point P3 is completed, the process proceeds to step S4 again, and it is checked whether or not there is the next body axis tomographic image. If there is, the process branches to step S5 again. Whether or not the next body axis tomographic image exists is determined by whether or not the operator has clicked the "Next>" button.
When the "Next>" button is clicked, it is determined that the next body axis tomographic image exists, and the process branches to step S5.

When the operator clicks the "Next>" button, as shown in FIG. 7, the operation support frame 10a displays "Set the slice in the diaphragm and click the center of the descending aorta." The comment is displayed. In step S5, the operator clicks the "Return>" button or the "Next>" button to display the designated image in the image window 11.

Next, returning to step S3, the mouse 2d
And the like to move the pointer to the center of the descending aorta, and then click to confirm the selection point P4. It should be noted that this selection point P4 can also be corrected later on the multi-directional reconstructed image, so that it is not necessary to specify an accurate position.

In the present embodiment, the selection points P1 to P4 required when designing the stent model representing the shape of the stent to be inserted and placed in the aortic arch are designated by three body axis tomographic images. Since this is the last image, the body axis tomographic image of the diaphragm is the last image. Therefore, when this image is displayed, the "Next>" button is displayed at the bottom of the operation window 10 instead of the "Complete" button. > Button is displayed.
The designated number of selection points can be set arbitrarily.

After the designation of the selection point P4 is confirmed,
When the “Complete>” button is clicked, it is determined in step S4 that the next body axis tomographic image does not exist, and the process proceeds to step S6.

In step S6, the image window 1
1, a multi-directional constituent image (MPR) is displayed. Specifically, as shown in FIG. 8, the image window 11 is divided into four small windows 11a to 11d, and three small windows 11a to 11c among them are divided into anatomy of the aorta which is a representative of the MPR of the patient. Three target tomographic images (body axis tomographic image (XY plane), sagittal tomographic image (XZ plane), coronal tomographic image (ZX plane)) are displayed. Operation window 1
0 is the patient file number (ID) and patient name (Nam
e), patient's examination ticket number (ID), control bar (WW), level bar (WL), image control bar (Image), sagittal tomographic control bar (Sagittal) that scrolls the sagittal tomographic image, coronary tomographic image A coronal tomographic control bar (Coronal) for scrolling and a rotational control bar (Ima) for setting and displaying a rotation angle of a body axis tomographic image (Axial)
geRotation), arbitrary selection point P (Point
The center coordinates (Senter Point) indicating the coordinate points in the X, Y, and Z directions of the aorta shown in t) are displayed.

Then, in step S7, the selection points P1 to P4 designated in step S3 are displayed on the tomographic images displayed in the small windows 11a to 11c, and at the same time, the selection points P1 to P1 are displayed. Interpolation points for interpolating between P4 are displayed. The interpolation points are automatically added when the distances between the selection points P1 to P4 are relatively large and interpolate between the selection points, and in the present embodiment, the selection points P1 and P3. Interpolation points S1 and S2 are provided at two places, that is, between the selection points P2 and P3.

Then, when proceeding to step S8, each point P
1, S1, P3, S2, P2, P4 and the preset curve functions, the points P1, S1, P3, S2,
The central axis L passing through P2 and P4 is calculated, and each small window 1
It is displayed on each tomographic image displayed in 1a to 11c (see FIG. 8).

In step S9, the operator refers to the tomographic images displayed in the small windows 11a to 11c, and selects each selected point P1 displayed on each tomographic image.
~ P4 and the interpolation points S1 and S2 are dragged and moved on the central axis of the aorta, and the central axis L is superimposed on the central axis of the aorta. Then, "Enter" on the keyboard 2c
Press the key etc. to confirm the central axis L.

As described above, the small windows 11a to 11c
Since it is possible to align the central axis L with the center of the aorta while referring to the tomographic images displayed in each, it is possible to relatively easily correct even a three-dimensionally curved site, Good workability.

When the correction of the central axis L is completed, the process proceeds to step S10, and on the tomographic image of the aortic arch displayed in each of the small windows 11a to 11c, the cylindrical stent model M having the central axis as the center. The outline of is displayed.
In this embodiment, the stent model M to be inserted and left in the aortic arch is designed, so the diameter is set to 25 mm as an initial value suitable for the stent model M. However,
This initial value can be set arbitrarily. Therefore, for example, a stent model M to be inserted and placed in a blood vessel of the foot
When designing, the initial value can be set to 5 mm according to the blood vessel.

In step S11, the small window 11
A stereoscopic image of the aorta A is displayed in d, and a stereoscopic image of the cylindrical stent model M is displayed on the aortic arch.

Next, in step S12, the contour of the stent model M displayed in any of the small windows 11a to 11c is dragged and moved to correct the contour of the stent model M. At this time, since the aorta A and the organs around it are displayed in each of the small windows 11a to 11c, when the outline of the stent model M is moved, the outline is corrected along the aortic arch. It can be operated while checking whether or not Further, by determining the positional relationship with the organs around the aorta A, for example, even in a site where an aneurysm has occurred,
The contour line of the stent model can be corrected to a shape that can be predicted as an original blood vessel from the positional relationship with the surrounding organs.

Further, the three tomographic images of the MPR displayed in the small windows 11a to 11c and the stereoscopic image displayed in the small window 11d are interlocked, and step S
When the outer shape of the stent model M is corrected in 12, the stereoscopic image of the stent model M displayed in the small window 11d is automatically corrected in step S13 (see FIG. 9).

By visually recognizing the stereoscopic image of the stent model M, the operator can easily grasp the correction point and the degree of correction.

When the modification of the outline of the stent model M is completed, the program proceeds to step S14, and whether or not the operator requests the simulation for confirming the state where the stent model M is left in the aortic arch. Examine
If there is a simulation request, the process proceeds to step S15, the simulation process of the stent model M is executed, and the process proceeds to step S16. On the other hand, if there is no simulation request, steps S14 to S16
Jump to.

In the simulation process executed in step S15, the anatomical internal structure including the aorta is displayed in the image window 11, the created stent model M is superimposed on the anatomical internal structure, and this stent model is displayed. M
This is to confirm the suitability of whether it can be inserted and placed in the aortic arch and evaluate it.

When the operator needs to modify the stent model M, steps S16 to S1 are performed.
Return to step 2. On the other hand, if no correction is required, step S
It progresses from 16 to step S17.

At step S17, the stent shape data for specifying the stent shape such as the diameter, length, angle, and twist of the stent model M is stored in the recording means. When it is desired to transfer the data to the NC processing machine terminal 4, the process proceeds to step S19, the stent shape data is transferred to the NC processing machine terminal 4, and then the routine ends. If the operator does not want to transfer the tent shape data, the routine ends as it is.

Next, the processing at the NC processing machine terminal 4 will be described with reference to the flowchart shown in FIG. NC
In the processing machine terminal 4, in step S21, until the stent shape data is input from the stent design support device 2,
When in the standby state and the stent shape data is input,
Go to step S22, read the stent shape data,
In step S23, based on the stent shape data, it is converted into numerical data for stent type processing.

Then, in step S24, the NC processing machine 5 is operated based on the numerical data for stent type processing,
A stent mold is formed. The NC processing machine 5 is for processing a space 33 for holding and shaping the stent 21a in a stent molding die. By mounting the straight stent 21a in this space 33 and heat-treating the space, the stent 21a is formed. The shape of the space 33, that is, the shape along the stent model M is stored.

As shown in FIGS. 11 and 12, the stent molding die 30 used in the present embodiment is composed of a pair of blocks 31 and 32, and each block 31 and 32 has a straight stent. Half-cylindrical recesses 31a and 32a for holding and shaping 21a are processed by the NC processing machine 5. Then, the space 33 is formed by combining the concave portions 31a and 32a.

The heat treatment process is performed in the following procedure. That is, first, as shown in FIG. 11, the recesses 31a and 32a are formed.
After setting the straight stent 21a on the
As shown in FIG. 2, the blocks 31 and 32 are closed and the stent 21a is sandwiched in the space 33 formed by the recesses 31a and 32a.

Next, the stent 21a sandwiched in the space 33 is heated at a high temperature for a certain period of time, as shown in FIG.
As shown in, the stent 21b that stores the shape along the space 33 is formed.

In this case, as shown in FIG. 10 (c), a graft (artificial vessel) 2 is formed on the outer circumference (or inner circumference) of the stent 21b which has been heat-treated in a predetermined manner, if necessary.
The stent graft 23 covering 2 may be used.

[0064]

As described above, according to the present invention,
Since the stent model can be designed while displaying the stent model on the anatomical body lumen displayed in the multidirectional reconstruction image, it becomes possible to intuitively understand the shape of the stent. , It is possible to design a stent model that fits the shape of the anatomical lumen of an individual patient, taking into account the relationship with the surrounding organs.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a stent design support device.

FIG. 2 is a flowchart showing a three-dimensional shape data calculation routine (No. 1).

FIG. 3 is a flowchart showing a three-dimensional shape data calculation routine (part 2).

FIG. 4 is a flowchart showing a numerical data conversion routine for stent type processing.

FIG. 5 is an explanatory view showing a state in which a tomographic image of the body axis in the vicinity of the base of the ascending aorta is displayed on the monitor.

FIG. 6 is an explanatory diagram showing a state in which a body axis tomographic image near the aortic arch is displayed on the monitor.

FIG. 7 is an explanatory diagram showing a state in which a body axis tomographic image near the diaphragm is displayed on the monitor.

FIG. 8 is an explanatory diagram showing a state in which three tomographic images are displayed on the monitor.

FIG. 9 is an explanatory diagram showing a state in which three tomographic images and a stereoscopic image are displayed on the monitor.

FIG. 10 is a perspective view showing the stent by state.

FIG. 11 is a perspective view of the stent-forming mold and the stent in a mold-opened state.

FIG. 12 is a perspective view of a stent molding die and a stent in a mold clamped state.

[Explanation of symbols]

1 3D image diagnostic device 2 Stent design support device 4 NC processing machine terminal 5 NC processing machine 10 Operation window 11 Image window 11a-11d Small window 21a21b stent 23 Stent graft 30 Stent mold A aorta L central axis M stent model P1 to P4 selection points S1, S2 interpolation points

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G06F 17/50 680 G06F 17/60 126Q 5B057 17/60 126 126Z G06T 1/00 290B G06T 1/00 290 A61B 5/05 390 (72) Inventor Hiroyuki Asano 51 Iwai-cho, Hodogaya-ku, Yokohama-shi, Kanagawa F-Term in Piolax Medical Device Co., Ltd. (reference) 4C093 AA22 AA26 CA23 CA50 DA02 EE01 EE30 FD07 FF15 FF30 FF42 FF45 FG05 H06 F04 4C096 AB50 AC10 AD14 DC11 DC14 DC19 DC21 DC23 DC24 DC28 DC36 4C167 AA56 BB70 CC09 CC10 DD01 DD08 FF05 HH22 4C301 EE20 JC01 KK03 KK17 KK18 KK27 KK30 KK40 LL13 LL20 5B046 AA00 FA18 GA01 HA04 HA05 HA08 5B057 AA09 CA02 CA08 CA13 CA16 CB02 CB08 CB12 CB16 CE08

Claims (8)

[Claims] 1. A means for generating a multi-directional reconstructed image of the patient based on a three-dimensional tomographic image obtained from the patient, and an arbitrary anatomical body lumen displayed in the multi-directional reconstructed image. Means for specifying a plurality of selection points, means for setting a stent model central axis passing through the selected points based on the specified selection points and a preset curve function, and the stent model central axis A means for correcting the axial direction of the anatomical body lumen, and a contour line of the stent model indwelling in the anatomical body lumen on the anatomical body lumen with the central axis for the stent model as a center. Means for generating, a means for displaying the anatomical body lumen and the stent model indwelling in the anatomical body lumen in a stereoscopic image, and an outline of the stent model for the multidirectional reconstructed image Means to correct above, And a means for automatically correcting the contour line of the stent model displayed on the body image in association with the contour line of the stent model displayed on the multidirectional reconstructed image. Support device. 2. The stent design support apparatus according to claim 1, wherein the multi-direction reconstructed image is composed of three tomographic images of a body-axis tomographic image, a sagittal tomographic image, and a coronal tomographic image. . 3. The stent design support apparatus according to claim 2, wherein the selection point is designated on the body axis tomographic image. 4. The method according to claim 1, further comprising means for confirming whether or not the completed stent model can be placed in the anatomical body lumen. The stent design support device described in (1). 5. A step of generating a multidirectional reconstructed image of the patient based on a three-dimensional tomographic image obtained from the patient, and an arbitrary anatomical body lumen displayed in the multidirectional reconstructed image. The step of designating a plurality of selection points, the step of setting a stent model central axis passing through the selected points based on the specified selection points and a preset curve function; A step of correcting in the axial center direction of the anatomical body lumen, and a contour line of the stent model indwelling in the anatomical body lumen on the anatomical body lumen with the central axis for the stent model as a center. A step of generating, a step of displaying the anatomical body lumen and the stent model indwelling in the anatomical body lumen as a stereoscopic image, and an outline of the stent model, the multidirectional reconstructed image The above correction process and the above And a step of automatically correcting the contour line of the stent model displayed on the body image in association with the contour line of the stent model displayed on the multidirectional reconstructed image. How to help. 6. The stent design according to claim 5, further comprising the step of confirming whether the completed stent model can be placed in the anatomical body lumen. How to help. 7. A step of generating a multi-directional reconstructed image of the patient based on a three-dimensional tomographic image obtained from the patient, and an arbitrary anatomical body lumen displayed in the multi-directional reconstructed image. Specifying a plurality of selection points, a step of setting a stent model central axis passing through the selected points based on the specified selection points and a preset curve function; A step of correcting in the axial center direction of the anatomical body lumen, and a contour line of the stent model indwelling in the anatomical body lumen on the anatomical body lumen with the central axis for the stent model as a center. A step of generating, a step of displaying the anatomical body lumen and the stent model indwelling in the anatomical body lumen as a stereoscopic image, and an outline of the stent model, the multidirectional reconstructed image Up And a step of automatically correcting the outline of the stent model displayed on the stereoscopic image in association with the outline of the stent model displayed on the multidirectional reconstructed image. A stent design support program that is characterized by 8. A step of generating a multidirectional reconstructed image of the patient based on a three-dimensional tomographic image obtained from the patient, and an arbitrary anatomical body lumen displayed in the multidirectional reconstructed image. Specifying a plurality of selection points, a step of setting a stent model central axis passing through the selected points based on the specified selection points and a preset curve function; A step of correcting in the axial center direction of the anatomical body lumen, and a contour line of the stent model indwelling in the anatomical body lumen on the anatomical body lumen with the central axis for the stent model as a center. A step of generating, a step of displaying the anatomical body lumen and the stent model indwelling in the anatomical body lumen as a stereoscopic image, and an outline of the stent model, the multidirectional reconstructed image Up And a step of automatically correcting the outline of the stent model displayed on the stereoscopic image in association with the outline of the stent model displayed on the multidirectional reconstructed image. A recording medium storing a computer-readable stent design support program.