Method of simulating deployment of a valve assembly and valve assembly release assessment system

Abstract

The application relates to a method for simulating valve assembly deployment and a valve assembly release evaluation system, the method for simulating valve assembly deployment comprising the following steps: S1, establishing a valve support model and a blood vessel model based on images of a valve support of a valve assembly and a blood vessel of a patient; S2, obtaining first coordinates of support control points of the valve support model in a deployed state, and obtaining second coordinates of the support control points of the valve support model in a compressed state based on the first coordinates and a nominal size of the valve support after compression, wherein the support control points are intersection points of metal wires of the valve support model; S3, adjusting the valve support model to the compressed state based on the second coordinates; S4, placing the valve support model in the compressed state at a release position of the blood vessel model; and S5, obtaining third coordinates of the support control points after deployment in the blood vessel model based on the first coordinates, the second coordinates and the blood vessel model, and deploying the valve support model in the compressed state at the release position according to the third coordinates.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a method for simulating valve assembly deployment and a valve assembly release evaluation system. Background Technology

[0002] Heart valve interventional surgery refers to the procedure of replacing a diseased valve with a valve component inserted through a blood vessel. However, in actual surgery, because it is difficult for surgeons to predict the outcome of releasing an artificial valve at different locations, they often spend a significant amount of time repeatedly trying to adjust the valve release position, leading to prolonged surgery time and poorer prognosis. Summary of the Invention

[0003] Therefore, it is necessary to provide a method for simulating valve component deployment and a valve component release assessment system to address the issue of valve component deployment within blood vessels.

[0004] A method for simulating valve assembly deployment, the method comprising:

[0005] S1. Establish valve stent and vascular models based on images of valve components and patient blood vessels;

[0006] S2. Obtain the first coordinates of the stent control point of the valve stent model in the unfolded state, and based on the first coordinates and the nominal size of the valve stent after compression, obtain the second coordinates of the stent control point of the valve stent model in the compressed state, wherein the stent control point is the intersection of the metal wires of the valve stent model.

[0007] S3. Based on the second coordinate, adjust the valve stent model to a compressed state;

[0008] S4. Place the compressed valve stent model into the release position of the blood vessel model;

[0009] S5. Based on the first coordinate, the second coordinate and the blood vessel model, obtain the third coordinate of the stent control point after it is deployed in the blood vessel model, and deploy the compressed valve stent model at the release position according to the third coordinate.

[0010] S6. Based on the relative positional relationship between the valve stent and the skirt and leaflets of the valve assembly, unfold the skirt model and leaflet model in the valve stent model to obtain a simulated image of the unfolded valve assembly.

[0011] In one embodiment, it further includes:

[0012] S7. Based on the simulated image of the unfolded valve assembly, a distance distribution map of the valve stent model relative to the blood vessel model is obtained. The user determines whether the release position of the valve stent model in step S4 is appropriate based on the distance distribution map.

[0013] In one embodiment, if the user determines in step S7 that the release position is inaccurate, step S8 is further included:

[0014] S81. Adjust the release position in step S4;

[0015] S82. Repeat steps S4 to S7 until the user determines in step S7 that the release position is accurate. In one embodiment, step S41 is included before step S5, in which the valve stent model in a compressed state is gradually unfolded, the stent control points are detected to touch the wall, and the touch coordinates of some of the stent control points are obtained.

[0016] In one embodiment, in step S5, the third coordinates of each of the stent control points are obtained based on the first coordinates, the second coordinates, the wall contact coordinates, and the blood vessel model.

[0017] In one embodiment, based on the third coordinate, a Laplace deformation algorithm is used to control the unfolding of the valve stent model at the release position.

[0018] In one embodiment, the method for unfolding the skirt model and the leaflet model in step S6 includes:

[0019] S61. Based on the relative positional relationship between the valve stent, the skirt, and the leaflet, extract the skirt control point of the skirt and the leaflet control point of the leaflet.

[0020] S62. Obtain the positional relationship between the skirt control point and the support control point, and the positional relationship between the leaflet control point and the support control point;

[0021] S63. Map the skirt control points and the leaflet control points onto the unfolded valve stent model to obtain the relative positions of the unfolded skirt model and the valve stent model, as well as the relative positions of the leaflet model and the valve stent model. Draw the skirt model and the leaflet model to obtain a simulated image of the unfolded valve assembly.

[0022] In one embodiment, step S2 includes:

[0023] S21. Extract the skeleton structure of the valve stent model, identify the intersection of the metal wires of the valve stent model, and use the intersection as the stent control point;

[0024] S22. Based on the adjacency relationship of the stent control points in the deployed state of the valve stent model, establish a spring mass model of the stent control points to obtain the first coordinates.

[0025] This application also provides a valve component release assessment system, the valve component release assessment system comprising:

[0026] Processor, the processor being configured to:

[0027] Valve stent and vascular models are established based on images of valve components and patient blood vessels;

[0028] Obtain the mapping relationship between the stent control points of the valve stent model in the deployed state and the compressed state, wherein the stent control points are the intersection points of the metal wires of the valve stent model;

[0029] The compressed valve stent model is placed into the release position of the blood vessel model;

[0030] Based on the mapping relationship, the valve stent model simulating the compressed state unfolds at the release position;

[0031] Based on the relative positional relationship between the valve stent and the skirt and leaflets of the valve assembly, the skirt model and leaflet model are unfolded in the valve stent model to obtain a simulated image of the unfolded valve assembly.

[0032] A display connected to the processor for displaying the analog image.

[0033] In one embodiment, in response to the simulated state of the valve assembly after deployment not meeting the set requirements, a recommended release position or prompt information is displayed on the display.

[0034] The above-described method for simulating valve assembly deployment includes the following steps: S1, establishing a vascular model based on the patient's vascular image, and establishing a valve stent model based on the valve stent image of the valve assembly; S2, obtaining the first coordinates of the stent control points in the deployed state of the valve stent model, and obtaining the second coordinates of the stent control points in the compressed state of the valve stent model based on the first coordinates and the nominal size of the compressed valve stent; S3, adjusting the valve stent model to the compressed state based on the second coordinates; S4, placing the compressed valve stent model into the release position of the vascular model; S5, obtaining the third coordinates of the stent control points after deployment within the vascular model based on the first coordinates, the second coordinates, and the vascular model, and deploying the compressed valve stent model at the release position according to the third coordinates; S6, adjusting the skirt model and leaflet model within the valve stent model according to the relative positional relationship between the valve stent and the skirt and leaflet of the valve assembly, thereby obtaining a simulated image of the valve assembly deployed within the vascular model. This application can generate a simulated image of the valve assembly unfolding through the above steps, which helps doctors predict the expansion process and result of the valve stent of the valve assembly after it is released at the release location. This can help doctors find the release location more quickly, improve surgical efficiency, and improve surgical prognosis. Attached Figure Description

[0035] Figure 1 A flowchart of the method for simulating valve assembly deployment provided in this application.

[0036] Figure 2 A first-view structural schematic diagram of the valve stent model provided in this application.

[0037] Figure 3 This is a second-view structural schematic diagram of the valve stent model provided in this application.

[0038] Figure 4 A schematic diagram of the valve stent model provided in this application in a compressed state.

[0039] Figure 5 The diagram shows the valve stent model provided in this application in a compressed state, placed within a vascular model.

[0040] Figure 6 This is a schematic diagram of the structure of the valve stent model provided in this application unfolded within a vascular model.

[0041] Figure 7 This is a schematic diagram of the structure of the valve assembly model provided in this application unfolded within a blood vessel model.

[0042] In the picture:

[0043] 100. Valve stent model; 110. Stent control point;

[0044] 200. Vascular model;

[0045] 300. Skirt trim model;

[0046] 400. Leaflet model. Detailed Implementation

[0047] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0048] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0049] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0051] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0052] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0053] This application provides a method for simulating valve assembly deployment, such as Figures 1 to 7 As shown, the method for simulating valve assembly deployment includes:

[0054] S1. Based on images of the valve component, the valve stent, and the patient's blood vessels, a valve stent model 100 and a blood vessel model 200 are established;

[0055] S2. Obtain the first coordinate of the stent control point 110 of the valve stent model 100 in the unfolded state, and based on the first coordinate and the nominal size of the valve stent after compression, obtain the second coordinate of the stent control point 110 of the valve stent model 100 in the compressed state, wherein the stent control point 110 is the intersection of the metal wires of the valve stent model 100.

[0056] S3. Based on the second coordinate, adjust the valve stent model to a compressed state by 100;

[0057] S4. Place the compressed valve stent model 100 into the release position of the vascular model 200;

[0058] S5. Based on the first coordinate, the second coordinate and the vascular model 200, the third coordinate of the stent control point 110 after unfolding in the vascular model 200 is obtained, and the valve stent model 100 in the compressed state is unfolded at the release position according to the third coordinate.

[0059] S6. Based on the relative positional relationship between the skirt and leaflets of the valve stent and the valve assembly, the skirt model 300 and the leaflet model 400 are unfolded in the valve stent model 100 to obtain a simulated image of the unfolded valve assembly.

[0060] The above-described method for simulating valve assembly deployment includes the following steps: S1, establishing a vascular model 200 based on the patient's vascular image, and establishing a valve stent model 100 based on the valve stent image of the valve assembly; S2, obtaining the first coordinates of the stent control point 110 of the valve stent model 100 in the deployed state, and obtaining the second coordinates of the stent control point 110 of the valve stent model 100 in the compressed state based on the first coordinates and the nominal size of the valve stent after compression; S3, adjusting the valve stent model 100 to the compressed state based on the second coordinates; and S4, placing the compressed valve stent... S5. The stent model 100 is placed at the release position of the vascular model 200; S6. Based on the first coordinate, the second coordinate, and the vascular model 200, the third coordinate of the stent control point 110 after unfolding within the vascular model 200 is obtained. The compressed valve stent model 100 is then unfolded at the release position according to the third coordinate; S7. Based on the relative positional relationship between the valve stent and the skirt and leaflets of the valve assembly, the skirt model 300 and leaflet model 400 are adjusted to unfold within the valve stent model 100, thus obtaining a simulated image of the valve assembly unfolding within the vascular model 200. This application, through the above steps, can obtain a simulated image of the unfolded valve assembly, helping doctors predict the expansion process and outcome of the valve stent after the valve assembly is released at the release position. This can help doctors find the release position more quickly, improve surgical efficiency, and improve surgical prognosis.

[0061] It should be noted that the nominal dimensions refer to the dimensions of the material. The nominal dimensions of the valve stent can be found in the manufacturer's instruction manual for the valve assembly.

[0062] It should be noted that the method for simulating valve assembly deployment provided in this application can be used preoperatively to simulate the release position of the valve assembly in a vascular model, and to output data such as... Figure 7 The image shown is intended to be presented to the doctor or patient.

[0063] The method for simulating valve component deployment provided in this application can also be used intraoperatively. First, a valve stent model 100 and a blood vessel model 200 are established. Then, the valve stent model 100 is placed in a compressed state. During the operation, the surgeon delivers the valve stent to the release position of the patient's blood vessel. This application can obtain the current intraoperative image. Then, in the model, the compressed valve stent model 100 is correspondingly set in the blood vessel model 200, and the relative positions of the valve stent model 100 and the blood vessel model 200 in the model match the relative positions of the valve stent and the blood vessel during the operation. Then, the simulated image of valve component deployment is obtained by simulating valve component deployment to predict whether the current release position during the operation is accurate.

[0064] In some embodiments, such as Figure 2 and Figure 3 As shown, step S2 includes:

[0065] S21. Extract the skeleton structure of the valve stent model 100, identify the intersection of the metal wires of the valve stent model 100, and use the intersection as the stent control point 110.

[0066] S22. Based on the adjacency relationship of the stent control points 110 in the deployed state of the valve stent model 100, establish the spring mass model of the stent control points 110 to obtain the first coordinates.

[0067] By establishing a spring-mass model based on the positional relationship between adjacent stent control points 110 in the deployed state of the valve stent model 100, the first coordinates are obtained. Then, the second coordinates are calculated based on the first coordinates and the calibration dimensions.

[0068] It should be noted that in step S21, setting up the stent control point 110 means using the average curvature skeletonization algorithm to extract the center line (i.e., skeleton structure) of the valve stent model 100, identifying the intersection position of the metal wires based on the number of neighboring nodes of the center line node, and using the intersection point as the stent control point 110.

[0069] It should be noted that the spring-mass model is a method of simulating object deformation using Newton's laws of motion. In this embodiment, establishing the spring-mass model means using the support control point 110 as a unit mass point, and the distance between the support control point 110 and adjacent support control points 110 as the zero-force length of the spring model. The specific steps for establishing the spring-mass model of the support control point 110 are conventional techniques in this field and will not be elaborated here.

[0070] In some embodiments, such as Figure 4As shown, in step S3, based on the second coordinate, the Laplace deformation algorithm is used to control the deformation of the valve stent model 100 to a compressed state. The Laplace deformation algorithm can transform the valve stent model 100 from an expanded state to a compressed state.

[0071] It should be noted that the Laplace transformation algorithm is common knowledge in this field, and the specific conversion steps will not be described in detail here.

[0072] In some embodiments, such as Figure 4 and Figure 5 As shown, in step S4, the compressed valve stent model 100 is placed into the blood vessel model 200 through a rigid transformation. Placing the compressed valve stent model 100 into the blood vessel model 200 through a rigid transformation prevents the deformation of the valve stent model 100 in the blood vessel model 200 from affecting the results of subsequent simulation images.

[0073] It should be noted that when an image is translated and rotated, the shape of the image remains unchanged, and the resulting transformation is called a rigid transformation.

[0074] In some embodiments, step S41 is included before step S5, in which the compressed valve stent model 100 is gradually unfolded, and the stent control points 110 are detected to touch the wall to obtain the wall coordinates of some stent control points 110. The stent control points 110 are constrained so that they are located in the lumen of the blood vessel model 200. During the unfolding process, the stent control points 110 are detected to touch the wall to obtain the wall coordinates of some stent control points 110 after touching the wall.

[0075] It should be noted that "touching the wall" refers to the contact between the stent control point 110 and the inner wall of the vascular model 200.

[0076] In one specific embodiment, the wall contact detection method includes: when the stent control point 110 contacts the inner wall of the blood vessel model 200, canceling the motion component of the stent control point 110 perpendicular to the blood vessel wall.

[0077] In some embodiments, such as Figure 6 As shown, in step S5, the third coordinates of each stent control point 110 are obtained based on the first coordinate, the second coordinate, the wall contact coordinate, and the vascular model 200. Based on the first coordinate, the second coordinate, the wall contact coordinate, and the vascular model 200, the third coordinates of the stent control points 110 of the valve stent model 100 after unfolding within the vascular model 200 are calculated. The valve stent model 100, which is in a compressed state, is then unfolded according to the third coordinates, so that the stent control points 110 of the valve stent model 100 are located at the third coordinate.

[0078] In some embodiments, based on a third coordinate, a Laplace deformation algorithm is used to control the unfolding of the valve stent model 100 at the release position. The Laplace deformation algorithm allows the valve stent model 100 to transition from a compressed state to an unfolded state within the vascular model 200.

[0079] It should be noted that the deployed state of the valve stent model 100 includes a fully deployed state and a partially deployed state. In some embodiments, the valve stent model 100 is in a fully deployed state within the vascular model 200, while in other embodiments, the valve stent model 100 is in a partially deployed state within the vascular model 200.

[0080] In some embodiments, such as Figure 6 and Figure 7 As shown, the method for unfolding the skirt model 300 and the leaflet model 400 in step S6 includes:

[0081] S61. Based on the relative positional relationship between the valve stent, skirt, and leaflets, extract the skirt control points of the skirt and the leaflet control points of the leaflets.

[0082] S62. Obtain the positional relationship between the skirt control point and the stent control point 110, and the positional relationship between the leaflet control point and the stent control point 110;

[0083] S63. Map the skirt control points and leaflet control points onto the unfolded valve stent model 100 to obtain the relative positions of the unfolded skirt model 300 and the valve stent model 100, as well as the relative positions of the leaflet model 400 and the valve stent model 100. Draw the skirt model 300 and the leaflet model 400 to obtain a simulated image of the unfolded valve assembly.

[0084] Because the skirt and leaflets are made of flexible materials, their unfolding process cannot be simulated by modeling. However, since the skirt and leaflets are fixed to the valve stent, the relative positional relationship between the skirt control point and the stent control point 110, as well as the relative positional relationship between the leaflet control point and the stent control point 110, can be used to simulate the position of the skirt control point on the valve stent model 100 after it unfolds within the blood vessel model 200, and the position of the leaflet control point on the valve stent model 100. Based on the positions of the skirt control point and the leaflet control point, the skirt model 300 and the leaflet model 400 are drawn, thus obtaining an image of the valve assembly unfolding within the blood vessel model 200.

[0085] In some embodiments, such as Figure 1 As shown, the method for simulating valve assembly deployment also includes:

[0086] S7. Based on the simulated image of the fully deployed valve assembly, a distance distribution map of the valve stent model 100 relative to the blood vessel model 200 is obtained. The user uses the distance distribution map to determine whether the release position of the valve stent model 100 in step S4 is appropriate. Based on the simulated image of the fully deployed valve assembly output in step S6, a distance distribution map of the valve stent model 100 relative to the blood vessel model 200 is obtained. The attachment coordinates of the valve assembly to the inner wall of the blood vessel model 200 and the non-attachment coordinates of the valve assembly to the inner wall of the blood vessel model 200 are calculated based on the distance distribution map. The user uses the attachment coordinates and non-attachment coordinates to determine whether the release position of the valve stent model 100 in step S4 is accurate.

[0087] In some embodiments, such as Figure 1 As shown, if the user determines in step S7 that the release position is inaccurate, step S8 is also included: S81, adjust the release position in step S4; S82, repeat steps S4 to S7 until the user determines in step S7 that the release position is accurate. When the user determines that the release position in step S4 is inaccurate based on the distance distribution map in step S7, it is necessary to adjust the release position of the valve stent model 100 within the blood vessel model 200. Steps S4 to S7 are repeated, so that the outer wall of the valve stent model 100 is partially attached to the inner wall of the blood vessel model 200 to obtain updated attachment coordinates, and partially not attached to the blood vessel model 200 to obtain updated non-attached coordinates. Then, the user re-determines whether the release position of the valve stent model 100 in step S4 is accurate based on the updated attachment coordinates and the updated non-attached coordinates. This process is repeated multiple times until the user determines that the most recent release position is accurate. The method for simulating valve assembly deployment provided in this application helps doctors find the precise release position of the valve assembly in the blood vessel, reducing surgical time and increasing the probability of surgical success.

[0088] It should be noted that the method for simulating valve assembly deployment mentioned above can be used preoperatively or intraoperatively. If used intraoperatively, the obtained image refers to a DSA image. If used preoperatively, the vascular model 200 mentioned in this application is generally obtained by segmenting CTA images, and is typically used after registering the vascular model 200 established from preoperative CTA images with the DSA image. In the future, it may be possible to directly obtain three-dimensional models of locations such as the aorta from DSA. If this technology matures, the vascular model 200 mentioned in this application can also be obtained directly from the DSA device.

[0089] This application also provides a valve component release assessment system, which includes:

[0090] The processor is configured as follows:

[0091] A valve stent model 100 and a blood vessel model 200 are established based on images of the valve assembly, the valve stent, and the patient's blood vessels.

[0092] Obtain the mapping relationship between the stent control point 110 of the valve stent model 100 in the deployed state and the compressed state, wherein the stent control point 110 is the intersection of the metal wires of the valve stent model 100.

[0093] The compressed valve stent model 100 is placed at the release position of the vascular model 200;

[0094] Based on the mapping relationship, the valve stent model 100, which simulates the compressed state, unfolds at the release position;

[0095] Based on the relative positional relationship between the skirt and leaflets of the valve stent and the valve assembly, the skirt model 300 and the leaflet model 400 are unfolded in the valve stent model 100 to obtain a simulated image of the unfolded valve assembly.

[0096] A monitor is connected to the processor to display analog images.

[0097] The aforementioned valve component release assessment system first establishes a valve stent model 100 and a vascular model 200 using a processor. Next, the compressed valve stent model 100 is placed at the release position of the vascular model 200. Then, the compressed valve stent model 100 is controlled to unfold at the release position. Following this, based on the relative positions of the valve stent and the skirt and leaflets of the valve component, the skirt model 300 and leaflet model 400 unfold within the valve stent model 100 to obtain a simulated image of the valve component unfolding. Finally, the simulated image is displayed on a monitor for the user to view. This application, through the above steps, can obtain a simulated image of the valve component unfolding, helping doctors predict the expansion process and outcome of the valve stent after the valve component is released at the release position. This can help doctors find the release position more quickly, improve surgical efficiency, and improve surgical prognosis.

[0098] In some embodiments, in response to a simulated state of the valve assembly after deployment not meeting set requirements, a recommended release position or prompt information is displayed on the monitor. After the simulated image is displayed on the monitor of the valve assembly release evaluation system, if the simulated state of the valve assembly after deployment does not meet set requirements, the monitor of the valve assembly release evaluation system provides the user with a recommended release position or prompt information to facilitate finding a suitable release position as quickly as possible.

[0099] It should be noted that the setting requirement means that the deployed valve assembly must completely seal the entire flow channel. If there are gaps, it will lead to paravalvular leakage, thus failing to meet the surgical requirements.

[0100] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0101] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A method for simulating valve assembly deployment before surgery, characterized in that, The method for simulating valve assembly deployment includes: S1. Based on images of the valve component, the valve stent, and the patient's blood vessels, a valve stent model (100) and a blood vessel model (200) are established; S2. Obtain the first coordinate of the stent control point (110) of the valve stent model (100) in the unfolded state, and based on the first coordinate and the nominal size of the valve stent after compression, obtain the second coordinate of the stent control point (110) of the valve stent model (100) in the compressed state, wherein the stent control point (110) is the intersection of the metal wires of the valve stent model (100); S3. Based on the second coordinate, adjust the valve stent model (100) to a compressed state; S4. Place the compressed valve stent model (100) into the release position of the blood vessel model (200); S41. The valve stent model (100) in a compressed state is gradually unfolded, and the stent control points (110) are detected to touch the wall, and the touch coordinates of some of the stent control points (110) are obtained. S5. Based on the first coordinate, the second coordinate, the wall contact coordinate and the blood vessel model (200), obtain the third coordinate of the stent control point (110) after it is unfolded in the blood vessel model (200), and unfold the valve stent model (100) in the compressed state at the release position according to the third coordinate. S6. Based on the relative positional relationship between the valve stent and the skirt and leaflets of the valve assembly, the skirt model (300) and leaflet model (400) are unfolded in the valve stent model (100) to obtain a simulated image of the unfolded valve assembly. The method for detecting contact with the vessel wall includes: when the stent control point (110) contacts the inner wall of the blood vessel model (200), canceling the motion component of the stent control point (110) perpendicular to the blood vessel wall.

2. The method for simulating valve assembly deployment according to claim 1, characterized in that, Also includes: S7. Based on the simulated image of the unfolded valve assembly, a distance distribution map of the valve stent model (100) relative to the blood vessel model (200) is obtained. The user determines whether the release position of the valve stent model (100) in step S4 is appropriate based on the distance distribution map.

3. The method for simulating valve assembly deployment according to claim 2, characterized in that, If the user determines in step S7 that the release position is inaccurate, step S8 is also included: S81. Adjust the release position in step S4; S82. Repeat steps S4 to S7 until the user determines in step S7 that the release position is accurate.

4. The method for simulating valve assembly deployment according to claim 1, characterized in that, Based on the third coordinate, the Laplace deformation algorithm is used to control the unfolding of the valve stent model (100) at the release position.

5. The method for simulating valve assembly deployment according to claim 1, characterized in that, The method for unfolding the skirt model (300) and the leaflet model (400) in step S6 includes: S61. Based on the relative positional relationship between the valve stent, the skirt, and the leaflet, extract the skirt control point of the skirt and the leaflet control point of the leaflet. S62. Obtain the positional relationship between the skirt control point and the support control point (110), and the positional relationship between the leaflet control point and the support control point (110); S63. Map the skirt control points and the leaflet control points onto the unfolded valve stent model (100) to obtain the relative positions of the unfolded skirt model (300) and the valve stent model (100), as well as the relative positions of the leaflet model (400) and the valve stent model (100). Draw the skirt model (300) and the leaflet model (400) to obtain a simulated image of the unfolded valve assembly.

6. The method for simulating valve assembly deployment according to claim 1, characterized in that, Step S2 includes: S21. Extract the skeleton structure of the valve stent model (100), identify the intersection of the metal wires of the valve stent model (100), and use the intersection as the stent control point (110). S22. Based on the adjacency relationship of the stent control point (110) in the deployed state of the valve stent model (100), establish the spring mass model of the stent control point (110) to obtain the first coordinate.

7. A valve component release assessment system, characterized in that, The valve assembly release assessment system includes: Processor, the processor being configured to: A valve stent model (100) and a blood vessel model (200) were established based on images of the valve assembly, the valve stent, and the patient's blood vessels; Obtain the first coordinate of the stent control point (110) of the valve stent model (100) in the unfolded state, and based on the first coordinate and the nominal size of the valve stent after compression, obtain the second coordinate of the stent control point (110) of the valve stent model (100) in the compressed state, wherein the stent control point (110) is the intersection of the metal wires of the valve stent model (100); Based on the second coordinate, the valve stent model (100) is adjusted to a compressed state; The compressed valve stent model (100) is placed into the release position of the blood vessel model (200); The valve stent model (100) in a compressed state is gradually unfolded, and the stent control points (110) are detected to touch the wall, and the touch coordinates of some of the stent control points (110) are obtained. Based on the first coordinate, the second coordinate, the wall contact coordinate and the blood vessel model (200), the third coordinate of the stent control point (110) after unfolding in the blood vessel model (200) is obtained, and the valve stent model (100) in the compressed state is unfolded at the release position according to the third coordinate; Based on the relative positional relationship between the valve stent and the skirt and leaflets of the valve assembly, the skirt model (300) and the leaflet model (400) are unfolded in the valve stent model (100) to obtain a simulated image of the unfolded valve assembly; The method for detecting contact with the vessel wall includes: when the stent control point (110) contacts the inner wall of the blood vessel model (200), canceling the motion component of the stent control point (110) perpendicular to the blood vessel wall; A display connected to the processor for displaying the analog image.

8. The valve assembly release assessment system according to claim 7, characterized in that, If the simulated state after the valve assembly is deployed does not meet the set requirements, a recommended release position or prompt information is displayed on the screen.

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