A method of forming a planar image by projecting an MPR image

Abstract

The application provides a method and system for forming a planar image by projecting a MPR image, which comprises: anchoring on a plurality of multi-layer planar reconstruction images MPR related to a ribbon image, the anchoring comprising a starting position and an ending position of the ribbon image; constructing a cuboid based on a predetermined direction and a three-dimensional space occupied by the ribbon image, all the anchoring points on the ribbon image being in the constructed cuboid; determining a generatrix based on the anchoring points on the ribbon image, the generatrix comprising anchoring points corresponding to the starting position and the ending position; constructing a plane parallel to a predetermined side of the cuboid and passing through the end points, projecting the ribbon image on the plane to generate a projection CPR image. The method and system of the application can display the morphology of the curved structure completely and in the same layer on the same plane, and truly reflect the positional relationship with the surrounding tissue structure.

Description

Technical Field

[0001] This invention relates to the field of projection image reconstruction, and more specifically to a method and system for forming a planar image by projecting an MPR (Multiplanar Reconstruction) image. Background Technology

[0002] Medical imaging physics encompasses a wide range of technologies, including X-ray imaging (CR, DR, CT), nuclear medicine diagnostic images, ultrasound images, and magnetic resonance imaging (MR). X-ray-based CT images, as well as MR-based single-photon emission computed tomography (SPECT) and positron emission tomography (PET), are three-dimensional images. The subsequent analysis of these three-dimensional images is a crucial research area now and will likely remain so for a long time. Among existing techniques for reconstructing curved images, the most commonly used are Maximum Intensity Projection (MIP) and Curved Planar Reformation (CPR). While MIP images accurately reflect structural relationships, they do not adequately display details within and around the lumen. CPR images, while clearly showing details within and around the lumen, cannot accurately reflect the relationships between blood vessels, nerves, and other linear images due to stretching. Medical imaging urgently needs a post-processing technology that can clearly display details inside and around the cavity, and accurately reflect its relationship with surrounding structures. Summary of the Invention

[0003] In view of the above problems, the present invention is proposed to provide a technical solution that overcomes or at least partially solves the above problems. Therefore, one aspect of the present invention provides a method for forming a planar image by projecting an MPR image, the method comprising:

[0004] Anchor points are set on several multi-plane planar reconstructed images (MPR) associated with the strip image, including the start and end positions of the strip image;

[0005] A cuboid is constructed based on the predetermined direction and the three-dimensional space occupied by the strip image. All anchor points on the strip image are within the constructed cuboid.

[0006] A busbar is determined based on anchor points on the curved strip image, and the busbar includes anchor points corresponding to the start and end positions;

[0007] A plane parallel to a predetermined side of the cuboid is constructed passing through the anchor point, and the strip image is projected onto this plane to generate a projected CPR image.

[0008] Optionally, the generatrix is ​​a curve.

[0009] Optionally, a busbar is determined based on several anchor points on the strip image, the busbar comprising several polyline segments formed by connecting adjacent anchor points.

[0010] Optionally, the method further includes:

[0011] Adjust the predetermined direction according to user input;

[0012] Based on the adjusted direction, a second cuboid is constructed in the three-dimensional space occupied by the strip image, and all feature points on the surface are within the constructed second cuboid.

[0013] A second plane parallel to a predetermined side of the second cuboid is constructed, passing through the anchor point, and the curved image is projected onto this second plane.

[0014] Optionally, anchor points are established on several multi-layered planar reconstructed images associated with the strip image, including the following steps:

[0015] Activate the multi-point anchor tool to create anchor points on several multi-plane reconstructed images (MPR).

[0016] After the anchor point is terminated, a path is generated based on the anchor point.

[0017] The projected CPR image is displayed in real time according to the described path;

[0018] Rotate the projected CPR image by a certain angle to generate a projected CPR image on a plane corresponding to the rotation angle.

[0019] The method of reconstructing a curved image by projecting MPR images according to the present invention is used to display images of the right L4 nerve and obturator nerve within a projection CPR window, wherein anchor points are set on several multi-slice planar reconstructed images related to the band image, including the following steps:

[0020] S1. Activate the multi-point anchor tool;

[0021] S2. In the MPR pane of the multiplanar reconstructed image, select the starting position of the right L4 nerve as the anchor point;

[0022] S3. Rotate the MPR image to expand the display range of the right L4 nerve and rotate to the origin of the right obturator nerve, along the right L4 nerve anchor point to the origin of the right obturator nerve;

[0023] S4. Rotate the MPR image to show a longer range of the right obturator nerve, anchoring along the right obturator nerve to the distal end shown in the image;

[0024] S5. Repeat step S4 until the anchor point reaches the distal end of the right obturator nerve.

[0025] Optionally, the method further includes: rotating the projected CPR image by a certain angle to display a projected CPR image corresponding to the angle, while simultaneously displaying a complete path indicator line.

[0026] Optionally, the multi-point anchor tool allows switching between anchor points within different multi-plane reconstructed image MPR windows.

[0027] The present invention also provides a system for forming a planar image by projecting an MPR image, characterized in that the system comprises:

[0028] Anchor point module, used to anchor points on several multi-plane reconstructed images (MPR) associated with a strip image, including the start and end positions of the strip image;

[0029] The cuboid construction module is used to construct a cuboid based on a predetermined direction and the three-dimensional space occupied by the strip image. All anchor points on the strip image are inside the constructed cuboid.

[0030] The path determination module is used to determine a busbar based on anchor points on the curved strip image. The busbar includes anchor points corresponding to the start and end positions.

[0031] The projection module is used to construct a plane parallel to a predetermined side of the cuboid passing through the anchor point, and to project the strip image onto the plane to generate a projected CPR image.

[0032] Optionally, the system is used to display images of the right L4 nerve and obturator nerve within a projection CPR window, wherein the anchor point module includes:

[0033] The Anchor Point Tool Activation Submodule is used to activate the multi-point anchor point tool;

[0034] The MPR image anchor submodule is used to select the starting position of the right L4 nerve as an anchor point within the MPR pane of the multiplanar reconstructed image;

[0035] The MPR image rotation submodule is used to rotate the MPR image, expand the display range of the right L4 nerve, and rotate it to the beginning of the right obturator nerve, so that the MPR image anchor submodule can anchor along the right L4 nerve to the beginning of the right obturator nerve; the MPR image rotation submodule is also used to repeatedly rotate the MPR image to display a longer range of the right obturator nerve, so that the MPR image anchor submodule can anchor along the right obturator nerve to the farthest end displayed in the image.

[0036] The technical solutions provided in this application embodiment have at least the following technical effects or advantages:

[0037] 1. It can display the shape of curved structures completely and on the same plane, and realistically reflect their relationship with the surrounding tissue structures.

[0038] 2. It can display the internal image features of curved structures and allows for arbitrary adjustment of layer thickness to achieve the best observation effect.

[0039] 3. During image display, spatial positioning is precise.

[0040] 4. An image can be projected onto any plane using CPR by rotating it arbitrarily.

[0041] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above technical solution, its purpose, features and advantages more obvious and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0042] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0043] Figure 1 A comparison chart of MIP, regular CPR, and Plain CPR is shown;

[0044] Figure 2 A flowchart of a method for reconstructing a surface image by projecting an MPR image is shown.

[0045] Figure 3 The schematic diagram of projection surface reconstruction is shown;

[0046] Figure 4 Another schematic diagram of projected surface reconstruction is shown;

[0047] Figure 5VR renderings of the right L4 nerve and obturator nerve are shown;

[0048] Figure 6 VR rendering of the left L5 nerve, S1 nerve and sciatic nerve is shown;

[0049] Figure 7 A system architecture diagram is shown for reconstructing a surface image by projecting an MPR image. Detailed Implementation

[0050] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0051] This invention proposes a novel technology, known as PlainCPR, which enables the projection and display of reconstructed CPR structures from curved surfaces onto any plane. It falls under the category of image post-processing technology. Taking a direct digital X-ray (DR) film as an example, a DR film projects a portion of the human body's structure onto a signal receiving plate to form a two-dimensional image. This invention, however, uses computer algorithms to project a curved structure from a three-dimensional image onto a specific plane.

[0052] PlainCPR is applicable to scenarios including strip-shaped structures with high contrast differences, such as blood vessels; strip-shaped structures of soft tissue density, such as nerves and tendons; and hollow tubular structures, such as the trachea and bronchi. In other related applications, it overcomes the inherent limitations of conventional CPR techniques. Conventional CPR stretches the surface along its length during the conversion from curved to flat, thus losing accuracy in the positional relationship between the target area and its surroundings. PlainCPR, however, can display the entire image without altering the surrounding positional relationships. Furthermore, PlainCPR allows for rotational observation and arbitrary layer thickness settings, better suited for displaying images within the same layer. Figure 1 The image shows a comparison of the imaging effects of MIP, conventional CPR, and PlainCPR. PlainCPR can display the relationship with the surrounding structures like MIP images, but at the same time, it can also display the details inside and around the organ cavity.

[0053] The present invention provides a method for forming a planar image by projecting an MPR image, such as... Figure 2 As shown, it specifically includes:

[0054] Anchor points are set on several multi-plane planar reconstructed images (MPR) associated with the strip image, including the start and end positions of the strip image;

[0055] A cuboid is constructed based on the predetermined direction and the three-dimensional space occupied by the strip image. All anchor points on the strip image are within the constructed cuboid.

[0056] A busbar is determined based on anchor points on the curved strip image, and the busbar includes anchor points corresponding to the start and end positions;

[0057] A plane parallel to a predetermined side of the cuboid is constructed passing through the anchor point, and the strip image is projected onto this plane to generate a projected CPR image.

[0058] The above method can display the morphology of the curved structure completely and in the same plane, and accurately reflect its relationship with the surrounding tissue structure. It can also display the internal image features of the curved structure like an MPR image, and the layer thickness can be adjusted arbitrarily to obtain the best observation effect.

[0059] Among them, such as Figure 3 As shown, the busbar is a curve, and a busbar is determined based on several anchor points on the strip image. The busbar may include several broken line segments formed by connecting adjacent anchor points.

[0060] like Figure 3 and 4 As shown, the method also includes:

[0061] Adjust the predetermined direction according to user input;

[0062] Based on the adjusted direction, a second cuboid is constructed in the three-dimensional space occupied by the strip image, and all feature points on the surface are within the constructed second cuboid.

[0063] A second plane parallel to a predetermined side of the second cuboid is constructed, passing through the anchor point, and the curved image is projected onto this second plane.

[0064] The process of anchoring points on several multi-layered planar reconstructed images associated with the strip image includes the following steps:

[0065] Activate the multi-point anchor tool to create anchor points on several multi-plane reconstructed images (MPR).

[0066] After the anchor point is terminated, a path is generated based on the anchor point.

[0067] The projected CPR image is displayed in real time according to the described path;

[0068] Rotate the projected CPR image by a certain angle to generate a projected CPR image on a plane corresponding to the rotation angle.

[0069] The above method uses the same projection principle as MIP, but with more precise spatial positioning, and the image can be rotated to achieve CPR projection onto any plane.

[0070] The following describes in detail the method of reconstructing a surface image by projecting an MPR image, based on two main applications.

[0071] The first specific implementation method is the specific steps and methods of the PlainCPR projection surface reconstruction technique in reconstructing the right L4 nerve and obturator nerve, especially the processing method for finally displaying the nerve pathway.

[0072] The method of reconstructing a curved image by projecting MPR images according to the present invention is used to display images of the right L4 nerve and obturator nerve within a projection CPR window, wherein anchor points are set on several multi-slice planar reconstructed images related to the band image, including the following steps:

[0073] S1. Activate the multi-point anchor tool.

[0074] Specifically, the process involves activating the multi-point anchor tool, clicking on the multi-plane reconstruction image (MPR) to create anchor points, thereby drawing the path. Anchor points can be switched between different MPR windows. After the anchor point is removed, the image in the PlainCPR window is displayed in real time while the path is being drawn.

[0075] S2. In the MPR pane of the multiplanar reconstruction image, select the starting position of the right L4 nerve as the anchor point.

[0076] Specifically, in the MPR image window of the multi-layer post-reconstruction technique, first select the starting position of the right L4 nerve, then click the mouse to realize the anchor point of the first point. At this time, the center point of the crosshair of the image also follows the first anchor point.

[0077] S3. Rotate the MPR image to expand the display range of the right L4 nerve and rotate to the origin of the right obturator nerve, along the right L4 nerve anchor point to the origin of the right obturator nerve.

[0078] Specifically, the image is rotated at a small angle to display the right L4 nerve as extensively as possible, and the origin of the right obturator nerve is also displayed simultaneously. Following the anchor point of the right L4 nerve to the origin of the right obturator nerve, the center point of the image's crosshair also follows to the last anchor point.

[0079] S4. Rotate the MPR image to show a longer range of the right obturator nerve, anchoring along the right obturator nerve to the distal end shown in the image.

[0080] Specifically, the image is rotated slightly to allow the right obturator nerve to be displayed over a longer range. Then, anchor points are made along the obturator nerve to the distal end displayed in the image. At this point, the center point of the crosshair in the image also follows to the last anchor point.

[0081] S5. Repeat step S4 until the anchor point reaches the distal end of the right obturator nerve.

[0082] Specifically, repeat step S4 until the distal end of the obturator nerve can no longer be displayed. Then, after the anchor point at the most distal position of the nerve can be displayed, right-click to end the anchor point. At this point, the images of the right L4 nerve and obturator nerve are displayed in the PlainCPR projection surface reconstruction window. Subsequently, by rotating the PlainCPR projection surface reconstruction image, different viewing angles can be achieved. At the same time, the complete path indicator line can be displayed on the VR image window.

[0083] like Figure 5 As shown, the path of the nerve is displayed on the VR image, which facilitates localization and treatment pathway planning.

[0084] The second specific implementation method is the specific steps and methods of the PlainCPR projection surface reconstruction technique when reconstructing the left L5 and S1 nerves and sciatic nerve, especially the processing method for finally displaying the nerve pathway.

[0085] The reconstruction of the left L5 nerve, S1 nerve, and sciatic nerve was performed using a combination of arbitrary plane rotation and multi-point anchoring. The specific steps are as follows:

[0086] S1. Activate the multi-point anchor tool.

[0087] Specifically, the process involves activating the multi-point anchor tool, clicking on the multi-plane reconstructed image (MPR) to create anchor points, thereby drawing the path. Anchor points can be switched between different MPR windows. After the anchor point is removed, the image in the PlainCPR window is displayed in real time while the path is being drawn.

[0088] S2. In the MPR pane of the multiplanar reconstruction image, select the starting position of the left L5 nerve as the anchor point.

[0089] Specifically, in the MPR window of the multiplanar reconstruction image, first select the starting position of the left L5 nerve and then set the first anchor point. At this time, the center point of the crosshair of the image also follows the first anchor point.

[0090] S3. Rotate the MPR image to expand the display area of ​​the left L5 nerve and follow the nerve anchor point to the end displayed in the image.

[0091] Specifically, rotate the image at a small angle to display the left L5 nerve as widely as possible, and then follow the nerve anchor point to the end displayed in the image. At this time, the center point of the crosshair in the image also follows to the last anchor point.

[0092] S4. Repeat step S3 until the anchor point reaches the distal end of the sciatic nerve.

[0093] Specifically: Since the sciatic nerve is continuous with the L5 nerve, repeat step (3) until the distal end of the continuous sciatic nerve can no longer be displayed. Then, after the anchor point at the most distal position of the nerve can be displayed, right-click the mouse to end the anchor point. At this time, the image of the left L5 nerve and the continuous sciatic nerve is displayed in the PlainCPR projection surface reconstruction window. Subsequently, by rotating the PlainCPR projection surface reconstruction image, different angles can be observed. At the same time, the complete path indicator line can be displayed on the VR image window.

[0094] Additionally, repeat steps S1-S4 above to display the left S1 nerve and its continuing sciatic nerve. At this point, both nerves will be saved in the list, and the list can be switched to change the nerves displayed in the PlainCPR projection image window. Furthermore, the paths of both nerves will be displayed simultaneously in the VR window, with the path of the activated nerve displayed in a different color.

[0095] like Figure 6 As shown, the path of the nerve is displayed on the VR image, which facilitates localization and treatment pathway planning.

[0096] The present invention also provides a system for forming a planar image by projecting an MPR image, such as... Figure 7 As shown, the system includes:

[0097] Anchor point module, used to anchor points on several multi-plane reconstructed images (MPR) associated with a strip image, including the start and end positions of the strip image;

[0098] The cuboid construction module is used to construct a cuboid based on a predetermined direction and the three-dimensional space occupied by the strip image. All anchor points on the strip image are inside the constructed cuboid.

[0099] The path determination module is used to determine a busbar based on anchor points on the curved strip image. The busbar includes anchor points corresponding to the start and end positions.

[0100] The projection module is used to construct a plane parallel to a predetermined side of the cuboid passing through the anchor point, and to project the strip image onto the plane to generate a projected CPR image.

[0101] The above system is used to display images of the right L4 nerve and obturator nerve within a projection CPR window, wherein the anchor point module includes:

[0102] The Anchor Point Tool Activation Submodule is used to activate the multi-point anchor point tool;

[0103] The MPR image anchor submodule is used to select the starting position of the right L4 nerve as an anchor point within the MPR pane of the multiplanar reconstructed image;

[0104] The MPR image rotation submodule is used to rotate the MPR image, expand the display range of the right L4 nerve, and rotate it to the beginning of the right obturator nerve, so that the MPR image anchor submodule can anchor along the right L4 nerve to the beginning of the right obturator nerve; the MPR image rotation submodule is also used to repeatedly rotate the MPR image to display a longer range of the right obturator nerve, so that the MPR image anchor submodule can anchor along the right obturator nerve to the farthest end displayed in the image.

[0105] The system is also used to display images of the left L5 and S1 nerves and the sciatic nerve within a projection CPR window, wherein the anchor point module includes:

[0106] The Anchor Point Tool Activation Submodule is used to activate the multi-point anchor point tool;

[0107] The MPR image anchor submodule is used to select the starting position of the left L5 nerve as an anchor point within the MPR pane of the multiplanar reconstructed image;

[0108] The MPR image rotation submodule is used to rotate the MPR image, expand the display range of the left L5 nerve, and follow the nerve anchor point to the end displayed in the image.

[0109] This invention is not limited to CT images and 3D MRI images (including SPECT and PET images), but can also be applied to any 3D volumetric data. The technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0110] 1. It can display the shape of curved structures completely and on the same plane, and realistically reflect their relationship with the surrounding tissue structures.

[0111] 2. It can display the internal image features of curved structures and allows for arbitrary adjustment of layer thickness to achieve the best observation effect.

[0112] 3. During image display, spatial positioning is precise.

[0113] 4. An image can be projected onto any plane using CPR by rotating it arbitrarily.

[0114] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0115] Similarly, it should be understood that, in order to simplify this disclosure and aid in understanding one or more of the various aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into this detailed description, wherein each claim itself is a separate embodiment of the invention.

[0116] It should be noted that the above embodiments are illustrative of the invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims.

Claims

1. A method for forming a planar image by projecting an MPR image, characterized in that, The method includes: Anchor points are set on several multiplanar reconstructed images (MPR) associated with the strip image, including the start and end positions of the strip image; A cuboid is constructed based on the predetermined direction and the three-dimensional space occupied by the strip image. All anchor points on the strip image are within the constructed cuboid. A busbar is determined based on anchor points on the strip image. The busbar includes anchor points corresponding to the start and end positions. The busbar is a curve and includes several broken line segments formed by connecting adjacent anchor points. Construct a plane parallel to a predetermined side of the cuboid passing through the anchor point, and project the strip image onto this plane to generate a projected CPR image; Adjust the predetermined direction according to user input; A second cuboid is constructed based on the adjusted direction and the three-dimensional space occupied by the strip image. All feature points on the curve are within the constructed second cuboid. A second plane parallel to a predetermined side of the second cuboid is constructed, passing through the anchor point, and the curved image is projected onto this second plane.

2. The method according to claim 1, characterized in that, Anchor points are established on several multi-layered planar reconstructed images associated with the strip image, including the following steps: Activate the multi-point anchor tool to create anchor points on several multi-plane reconstructed images (MPR). After the anchor point is terminated, a path is generated based on the anchor point. The projected CPR image is displayed in real time according to the described path; Rotate the projected CPR image by a certain angle to generate a projected CPR image on a plane corresponding to the rotation angle.

3. The method according to claim 1, characterized in that, This method is used to display images of the right L4 nerve and obturator nerve within a projection CPR window, wherein anchor points are set on several multiplanar reconstructed images (MPR) associated with the band image, and includes the following steps: S1. Activate the multi-point anchor tool; S2. In the MPR pane of the multiplanar reconstructed image, select the starting position of the right L4 nerve as the anchor point; S3. Rotate the MPR image to expand the display range of the right L4 nerve and rotate to the origin of the right obturator nerve, along the right L4 nerve anchor point to the origin of the right obturator nerve; S4. Rotate the MPR image to show a longer range of the right obturator nerve, anchoring along the right obturator nerve to the distal end shown in the image; S5. Repeat step S4 until the anchor point reaches the distal end of the right obturator nerve.

4. The method according to claim 3, characterized in that, The method further includes: rotating the projected CPR image by a certain angle to display the projected CPR image corresponding to the angle, while displaying the complete path indicator line.

5. The method according to claim 2, characterized in that, Use the multi-point anchor tool to switch between different MPR windows for multi-plane reconstructed images to set anchor points.

6. A system for reconstructing a surface image by projecting an MPR image, characterized in that, The system includes: Anchor point module, used to set anchor points on several multi-planar reconstructed images (MPR) associated with a strip image, including the start and end positions of the strip image; The cuboid construction module is used to construct a cuboid based on a predetermined direction and the three-dimensional space occupied by the strip image. All anchor points on the strip image are inside the constructed cuboid. The path determination module is used to determine a generatrix based on anchor points on a curved image. The generatrix includes anchor points corresponding to the start and end positions. The generatrix is ​​a curve and includes several broken line segments formed by connecting adjacent anchor points. The projection module is used to construct a plane parallel to a predetermined side of the cuboid passing through the anchor point, and to project the strip image onto the plane to generate a projected CPR image. The cuboid construction module adjusts the predetermined direction according to user input, and constructs a second cuboid according to the adjusted direction and the three-dimensional space occupied by the strip image. All feature points on the curve are within the constructed second cuboid. The projection module constructs a second plane that passes through the anchor point and is parallel to a predetermined side of the second cuboid, and projects the curved image onto the second plane.

7. The system according to claim 6, further characterized in that, This system is used to display images of the right L4 nerve and obturator nerve within a projected CPR window. The anchor point module includes: The Anchor Point Tool Activation Submodule is used to activate the multi-point anchor point tool; The MPR image anchor submodule is used to select the starting position of the right L4 nerve as an anchor point within the MPR pane of the multiplanar reconstructed image; The MPR image rotation submodule is used to rotate the MPR image, expand the display range of the right L4 nerve, and rotate it to the beginning of the right obturator nerve, so that the MPR image anchor submodule can anchor along the right L4 nerve to the beginning of the right obturator nerve; the MPR image rotation submodule is also used to repeatedly rotate the MPR image to display a longer range of the right obturator nerve, so that the MPR image anchor submodule can anchor along the right obturator nerve to the farthest end displayed in the image.

Images