RADIOTHERAPY EQUIPMENT CONTROL DEVICE, RADIOTHERAPY EQUIPMENT CONTROL METHOD, AND PROGRAM EXECUTED BY COMPUTER FOR RADIOTHERAPY EQUIPMENT

摘要

A radiotherapy equipment control device acquires reference position information for a specific location at a reference time. Furthermore, representative point reference position information is generated from reference position information for a plurality of markers at the reference time, and relative position information up to the reference position information for the specific location is generated. Moreover, representative point position information at another time is generated from the position information for a plurality of markers in a subject at the other time, which differs from the reference time. In addition, position information for the specific location at the other time is generated from the representative point position information and the relative position information. In this case, representative point reference position information and representative position information are generated on the basis of the position information and reference position information for the plurality of markers, said information having been weighted by weighting factors.

主权项

1. A radiotherapy equipment control device that specifies a position of a specific portion from positions of a plurality of markers located in the vicinity of the specific portion within a subject and controls radiotherapy equipment, the radiotherapy equipment control device comprising:
a reference position information acquisition unit configured to acquire reference position information representing a position within the body of the subject at a reference time of each of the specific portion and the plurality of markers; a representative point reference position information computation unit configured to generate reference position information representing a position within the body of the subject at the reference time of a representative point of the plurality of markers from the reference position information of the plurality of markers; a relative position information computation unit configured to generate relative position information of a position represented by the reference position information of the specific portion using a position represented by the reference position information of the representative point as a base point; a marker position information acquisition unit configured to acquire position information of the plurality of markers within the body of the subject at another time different from the reference time; a representative point position information computation unit configured to generate position information of the representative point within the body of the subject at the other time of the plurality of markers from the position information of the plurality of markers; and a specific portion position information computation unit configured to generate position information of the specific portion at the other time from the position information of the representative point and the relative position information, wherein the representative point reference position information computation unit specifies a weight coefficient for each of the plurality of markers and generates the reference position information of the representative point based on the position information of the plurality of markers weighted by the weight coefficient, and wherein the representative point position information computation unit generates the position information of the representative point based on the position information of the plurality of markers weighted by the weight coefficient.