Treatment planning system, device for calculating a scanning path and particle therapy system

Abstract

In a particle therapy treatment planning system for creating treatment plan data, the movement of a target (patient's affected area) is extracted from plural tomography images of the target, and the direction of scanning is determined by projecting the extracted movement on a scanning plane scanned by scanning magnets. Irradiation positions are arranged on straight lines parallel with the scanning direction making it possible to calculate a scanning path for causing scanning to be made mainly along the direction of movement of the target. The treatment planning system can thereby realize dose distribution with improved uniformity.

What is claimed is: 
     
         1 . A particle therapy system comprising:
 an ion beam accelerator;   at least one device receiving direction information referring to target movement; and   an irradiation control system controlling ion beam irradiation, a scanning direction of the ion beam irradiation being determined based on the received direction information referring to target movement.