Medical image processing device, treatment system, and storage medium

Patent metadata

Field	Value
Publication number	US-2021038917-A1
Application number	US-201916979619-A
Country	US
Kind code	A1
Filing date	Mar 7, 2019
Priority date	Mar 20, 2018
Publication date	Feb 11, 2021
Grant date	—

Abstract

A medical image processing device according to an embodiment includes a region-of-interest acquirer, a treatment plan acquirer, a degree-of-influence calculator, and a display controller. The region-of-interest acquirer is configured to acquire a partial region within a body of a patient as a region of interest. The treatment plan acquirer is configured to acquire treatment plan information determined in a planning stage of radiation treatment to be performed on the patient. The degree-of-influence calculator is configured to calculate a degree of influence representing an influence on the region of interest up to a range until radiation with which the patient is irradiated reaches a target portion to be treated within the body of the patient. The display controller is configured to generate a display image in which information regarding the degree of influence is superimposed on a current fluoroscopic image of the patient and causes a display to display the display image.

First claim

1 . A medical image processing device comprising:
a region-of-interest acquirer configured to acquire a partial region within a body of a patient as a region of interest; a treatment plan acquirer configured to acquire treatment plan information determined in a planning stage of radiation treatment to be performed on the patient; a degree-of-influence calculator configured to calculate a degree of influence representing an influence on the region of interest up to a range until radiation with which the patient is irradiated reaches a target portion to be treated within the body of the patient; and a display controller configured to generate a display image in which information regarding the degree of influence is superimposed on a current fluoroscopic image of the patient and cause a display to display the display image.

2 . The medical image processing device according to claim 1 ,
wherein the degree-of-influence calculator is configured to calculate the degree of influence on the basis of a degree of overlap between a passage path of the radiation that is radiated and the region of interest.

3 . The medical image processing device according to claim 2 ,
wherein the degree-of-influence calculator is configured to calculate the degree of influence on the basis of a ratio between a volume in which the passage path of the radiation that is radiated overlaps the region of interest and a volume of the region of interest.

4 . The medical image processing device according to claim 2 ,
wherein the degree-of-influence calculator is configured to calculate the degree of influence on the basis of a shortest distance between the passage path of the radiation that is radiated and the region of interest.

5 . The medical image processing device according to claim 1 ,
wherein the region-of-interest acquirer is configured to acquire a location where deviation between a region of the patient shown in a plan image captured in the planning stage and a region of the patient shown in the fluoroscopic image is greater than a predetermined threshold value as the region of interest.

6 . The medical image processing device according to claim 5 ,
wherein the region-of-interest acquirer is configured to acquire a location within a range of an irradiation path of the radiation among locations where the deviation of regions is greater than the threshold value as the region of interest.

7 . The medical image processing device according to claim 6 ,
wherein the region-of-interest acquirer is configured to acquire a location including a predetermined range provided around the range of the irradiation path of the radiation as the region of interest.

8 . The medical image processing device according to claim 1 ,
wherein the display controller is configured to generate the display image in which pixels associated with the region of interest within a range of an irradiation path of the radiation among pixels of the fluoroscopic image are highlighted in accordance with information regarding the degree of influence.

9 . The medical image processing device according to claim 8 ,
wherein the display controller is configured to generate the display image in which a color of the pixels to be highlighted is changed.

10 . The medical image processing device according to claim 9 ,
wherein the display controller is configured to combine a reconstructed image having the same range as the fluoroscopic image virtually reconstructed from a plan image captured in the planning stage with the fluoroscopic image and then to generate the display image in which the pixels to be highlighted are highlighted in accordance with information regarding the degree of influence.

11 . The medical image processing device according to claim 9 ,
wherein the display controller is configured to generate the display image in which pixels within a predetermined range provided around the range of the irradiation path of the radiation among pixels of the fluoroscopic image are highlighted in a method different from that of the pixels to be highlighted.

12 . The medical image processing device according to claim 1 , further comprising:
a three-dimensional image acquirer configured to acquire a three-dimensional image obtained by photographing the patient; and a cross-section acquirer configured to set a plane in a three-dimensional space and acquire a cross-sectional image obtained by segmenting the set plane from the three-dimensional image, wherein the display controller is further configured to generate a display image of the cross-sectional image and cause the generated display image to be displayed.

13 . The medical image processing device according to claim 12 ,
wherein the cross-section acquirer is configured to set the plane according to a primary vector parallel to the passage path of the radiation and another vector perpendicular to the primary vector.

14 . The medical image processing device according to claim 13 ,
wherein the other vector is one axial direction vector a three-dimensional coordinate system predefined in an environment where the patient is irradiated with the radiation.

15 . The medical image processing device according to claim 13 ,
wherein the display controller is configured to generate the display image of the cross-sectional image on which information representing a direction of the primary vector is superimposed.

16 . A treatment system comprising:
the medical image processing device according to claim 1 ; a treatment device comprising an irradiator configured to irradiate a target portion to be treated with the radiation and an imaging device configured to capture the fluoroscopic image; and a display device configured to display the display image.

17 . A non-transitory computer-readable storage medium storing a medical image processing program for causing a computer to function as a medical image processing device comprising:
a region-of-interest acquirer configured to acquire a partial region within a body of a patient as a region of interest; a treatment plan acquirer configured to acquire treatment plan information determined in a planning stage of radiation treatment to be performed on the patient; a degree-of-influence calculator configured to calculate a degree of influence representing an influence on the region of interest up to a range until radiation with which the patient is irradiated reaches a target portion to be treated within the body of the patient; and a display controller configured to generate a display image in which information regarding the degree of influence is superimposed on a current fluoroscopic image of the patient and cause a display to display the display image.

Assignees

• Toshiba Energy Systems & Solutions Corp

Inventors

• Karasawa Kenichi
• Hirai Ryusuke
• Okazaki Tomoya
• Taguchi Yasunori
• Okaya Keiko
• Mori Shinichiro

Classifications

• G06T12/00

  Tomographic reconstruction from projections · CPC title

• A61N5/1037 Primary

  taking into account the movement of the target, e.g. 4D-image based planning · CPC title

• A61N5/1049 Primary

  for verifying the position of the patient with respect to the radiation beam · CPC title

• A61N5/10 Primary

  X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy (A61N5/01 takes precedence) · CPC title

• G09G2380/08

  Biomedical applications · CPC title