IP Library › Granted Patent US 12691301
Granted Patent B2
US 12691301 · App. 18/431,013 · Granted Jul 28, 2026

Treatment planning apparatus, radiation treatment apparatus, and treatment planning method

Inventors: Jinichi Sugeno (Nasushiobara, JP); Masanori Koyama (Nasushiobara, JP)
Assignee: Canon Kabushiki Kaisha
A61N5/1031
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Quick Facts
Patent No.
US 12691301
App. No.
18/431,013
Granted
Jul 28, 2026
Kind
B2
Abstract

A treatment planning apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured to extract a tumor region rendered in a medical image. The processing circuitry is configured to extract a low oxygen region in the tumor region. The processing circuitry is configured to make a treatment plan for the tumor region, while using the low oxygen region as an index.

Claims (19)

1 . A treatment planning apparatus, comprising:

processing circuitry configured to

extract a tumor region rendered in a medical image;

extract a low-oxygen region in the tumor region; and

set a Planning Target Volume (PTV) for the extracted tumor region containing the low-oxygen region, the PTV being smaller than a PTV for a tumor region without a low-oxygen region.

2 . The treatment planning apparatus according to claim 1 , wherein the processing circuitry is further configured to make a treatment plan for the tumor region, based on a radiation dose for the low-oxygen region and a radiation dose for an organ at risk, which is a normal organ having a relatively high sensitivity to radiation.

3 . The treatment planning apparatus according to claim 2 , wherein the processing circuitry is further configured to;

cause a display to display a dose volume distribution in the low-oxygen region and a dose volume distribution in the organ at risk, with respect to each of radiation irradiation parameters, and

make the treatment plan in accordance with one of the radiation irradiation parameters determined based on the dose volume distribution in the low-oxygen region and the dose volume distribution in the organ at risk.

4 . The treatment planning apparatus according to claim 1 , wherein the processing circuitry is further configured to make the treatment plan including a radiation irradiation based on the tumor region, in addition to a radiation irradiation based on the low-oxygen region.

5 . The treatment planning apparatus according to claim 1 , wherein, when a ratio of a volume of the low-oxygen region to a volume of the tumor region is smaller than a threshold value, the processing circuitry is further configured to make the treatment plan for the tumor region, based on a radiation dose for the tumor region and a radiation dose for an organ at risk, which is a normal organ having a relatively high sensitivity to radiation.

6 . A radiation treatment apparatus, comprising:

circuitry configured to

obtain the treatment plan made by the treatment planning apparatus according to claim 1 ; and

perform radiation treatment based on the obtained treatment plan.

7 . A treatment planning method, comprising:

extracting a tumor region rendered in a medical image;

extracting a low-oxygen region in the tumor region; and

setting a Planning Target Value (PTV) for the tumor region containing the low-oxygen region, the PTV being smaller than a PTV for a tumor region without a low-oxygen region.