JP2023039760A5 - - Google Patents

Description

An image processing device according to one aspect of the present invention has the following configuration: That is, the image processing device has a control means for generating a slab image by projecting pixel values of a slab in a predetermined cross section of a three -dimensional image , the slab having a thickness along an axial direction intersecting the cross section as a slab thickness, onto the cross section, the pixel values of the image in the axial direction being projected onto the cross section, and the control means determines a pixel value of a pixel of the slab image by combining a maximum value and a minimum value of pixel values of pixels in the slab in the axial direction corresponding to the pixel .
According to another aspect of the present invention, there is provided an image processing method for an image processing device, comprising a control step of generating a slab image in which pixel values in an axial direction of the image are projected onto a predetermined cross section of a three-dimensional image, the slab having a thickness along an axial direction intersecting the cross section as a slab thickness, the pixel values being projected onto the cross section,
In the control step, a pixel value of a pixel of the slab image is determined by combining a maximum value and a minimum value of pixel values of pixels in the slab in the axial direction that correspond to the pixel.

Claims (28)

An image processing device having a control means for generating a slab image in which pixel values in an axial direction of a slab including a predetermined cross section of a three -dimensional image and having a thickness along an axial direction intersecting the cross section as a slab thickness, the image being projected onto the cross section,
The control means is an image processing device that determines a pixel value of a pixel of the slab image by combining a maximum value and a minimum value of pixel values of pixels in the slab in the axial direction that correspond to the pixel. 2. The image processing apparatus according to claim 1, wherein said control means determines the pixel value of the pixel of said slab image by combining said maximum value and said minimum value by adding said maximum value and said minimum value together. 3. The image processing device according to claim 1, wherein the control means sets a weight using a first distance from the cross section of a pixel giving the maximum value and a second distance from the cross section of a pixel giving the minimum value, and combines the maximum and minimum pixel values based on the weight. 4. The image processing device according to claim 3, wherein the control means sets the weight so that it becomes larger as the first distance or the second distance approaches 0 , and sets the weight so that it becomes smaller as the first distance or the second distance increases . 5. The image processing apparatus according to claim 3, wherein the control means sets the weight by referring to a table in which weights corresponding to combinations of the first distance and the second distance are stored in advance. 6. The image processing apparatus according to claim 3, wherein the control means determines the pixel value of the pixel of the slab image by calculating a weighted sum of the maximum value and the minimum value using the weights. The control means compares a first distance from the cross section to the pixel giving the maximum value with a second distance from the cross section to the pixel giving the minimum value,
The image processing apparatus according to claim 1 , wherein one of the maximum value and the minimum value, whichever is closer to the cross section, is selected as the pixel value of the pixel of the slab image. The image processing apparatus according to claim 1 , further comprising a display unit for displaying the slab image. The image processing device according to claim 8 , wherein the three-dimensional image includes a display target image to be displayed on the display unit. The image processing device according to claim 9 , wherein the control means controls the display of the display target image on the display unit. The image processing device according to claim 9 , wherein the control means includes a display control section that controls display of the display target image on the display section. The image processing apparatus according to claim 1 , further comprising an instruction unit that receives a designation of the three-dimensional image to be processed. The image processing device according to claim 12 , wherein the instruction unit is configured to receive at least one instruction from among a designation of the predetermined cross section, a designation of the slab thickness, and a designation of a method for generating the slab image. 14. The image processing apparatus according to claim 12, wherein the control means receives input of a reference image and a comparison image designated by the instruction unit as the three-dimensional image to be processed. 14. The image processing apparatus according to claim 12, wherein the control means comprises an input image acquisition section to which a reference image and a comparison image designated by the instruction section as the three-dimensional images to be processed are input. 16. The image processing apparatus according to claim 14, wherein the control means comprises a difference image generating section that generates a difference image between the reference image and the comparative image. The image processing device according to claim 16 , wherein the difference image generating section performs a process of aligning the comparison image with the reference image, using the reference image as a reference. The image processing device according to claim 16 or 17, wherein the three-dimensional image includes at least one of the reference image, the comparison image, and the difference image. 19. The image processing apparatus according to claim 16 , wherein the control means generates the slab image based on the difference image. The image processing device according to any one of claims 16 to 19, wherein the control means performs display control so that, when displaying a slab image of a slab including a cross-section of interest extracted from the reference image, a slab image of a slab including a corresponding cross-section of the difference image corresponding to the cross-section of interest is displayed with the same slab thickness. 21. The image processing device according to claim 16, wherein the control means generates a superimposed image by superimposing the difference image, in which pixels are colored based on the maximum pixel value and the minimum pixel value, on the reference image. the control means sets a first color as a display color for the pixel value of the maximum value and a second color as a display color for the pixel value of the minimum value;
The image processing apparatus according to claim 21 , wherein a superimposed image is generated by superimposing a mixture of the first color and the second color on the slab image of the reference image. 23. The image processing device according to claim 1, wherein the control means generates a slab image by projecting pixel values in a predetermined cross section of a three-dimensional image to be displayed, the slab including the pixel values in the axial direction of the image to be displayed, the pixel values being projected onto the cross section within a slab having a thickness along an axial direction intersecting the cross section as a slab thickness. 24. The image processing apparatus according to claim 23, wherein the control means determines the pixel value of each pixel of the slab image by combining a maximum value and a minimum value of pixel values of pixels in the slab corresponding to each pixel in the axial direction. An image processing method of an image processing device , comprising a control step of generating a slab image in which pixel values in an axial direction of a slab including a predetermined cross section of a three-dimensional image and having a thickness along an axial direction intersecting the cross section as a slab thickness, of the image projected onto the cross section,
The control step is an image processing method for determining a pixel value of a pixel of the slab image by combining a maximum value and a minimum value of pixel values of pixels in the slab in the axial direction that correspond to the pixel. The image processing method according to claim 25, wherein the control step generates a slab image by projecting pixel values in an axial direction of the three-dimensional image to be displayed onto a predetermined cross section of the three-dimensional image to be displayed, the slab having a thickness along an axial direction intersecting the cross section as a slab thickness. The image processing method according to claim 26 , wherein the control step determines the pixel value of each pixel of the slab image by combining the maximum and minimum pixel values of pixels in the slab corresponding to each pixel in the axial direction. A program for causing a computer to execute each step of the image processing method according to any one of claims 25 to 27 .