planning phase optimization method using Geometric relationship for respiratory gating radiation therapy

The present invention relates to a method to obtain the irradiation time of the radiation is found in optimizing the time of the survey in general less tissue in the breathing of the patient. The present invention specifically has the general organization among the respiratory cycle of the patient by defining the three-dimensional geometric relationship of the surrounding tissue and the target volume using the biological properties and Overlap Volume Histogram for the normal tissue the radiation esophagus, spine, etc. did not occur, the tumor It relates to a method to obtain the point at which radiation is the least investigated. A method for irradiating radiation to an aspect of the tumor (tumor) of the patient according to the present invention, the radiation sensitivity of the at least one first body of which within a predetermined distance from the tumor of a plurality of organs (organ) and the first engine and a first step of determining the irradiation timing of the radiation using geometric amount of overlap between the tumor; And a second step of irradiating the radiation in the irradiation timing of the tumor; including, but the radiation sensitivity and geometric overlapping degree may be changed according to the breathing of the subject.