Apparatus, method, and program for movable part tracking and treatment

A method for movable part tracking and treatment, comprising:

• an acquisition step;
• a first projection moving image generation step;
• an affected part area extraction step;
• a tracing target extraction step;
• a first parameter derivation step;
• and
• a second parameter derivation step, wherein
• the acquisition step is to acquire a three-dimensional moving image by imaging an inside of a body of a patient,
• the first projection moving image generation step is to generate a first projection moving image by projecting the three-dimensional moving image on a two-dimensional surface from a fixed direction, the three-dimensional moving image including a tracing target and an affected part area that are part of internal organs in a displaced state,
• the affected part area extraction step is to extract the displaced affected part area from the first projection moving image,
• the tracing target extraction step is to extract the displaced tracing target from the first projection moving image,
• the first parameter derivation step is to derive a first parameter indicative of position information on a beam irradiation point selected from the affected part area displaced in the first projection moving image, and
• the second parameter derivation step is to derive a second parameter necessary to extract the corresponding tracing target from another projection moving image based on the tracing target extracted from the first projection moving image.

A movable part tracking and treatment program for causing a computer to execute the steps comprising:

• an acquisition step;
• a first projection moving image generation step;
• an affected part area extraction step;
• a tracing target extraction step;
• a first parameter derivation step;
• and
• a second parameter derivation step, wherein
• the acquisition step is to acquire a three-dimensional moving image by imaging an inside of a body of a patient,
• a first projection moving image generation step is to generate a first projection moving image by projecting the three-dimensional moving image on a two-dimensional surface from a fixed direction, the three-dimensional moving image including a tracing target and an affected part area that are part of internal organs in a displaced state,
• the affected part area extraction step is to extract the displaced affected part area from the first projection moving image,
• the tracing target extraction step is to extract the displaced tracing target from the first projection moving image,
• the first parameter derivation step is to derive a first parameter indicative of position information on a beam irradiation point selected from the affected part area displaced in the first projection moving image, and
• the second parameter derivation step is to derive a second parameter necessary to extract the corresponding tracing target from another projection moving image based on the tracing target extracted from the first projection moving image.