COMPOUND DOSE DISTRIBUTION MEASURING METHOD

摘要

PROBLEM TO BE SOLVED: To enable grasping the three dimensional shape of a measured object and evaluating the three dimensional dose distribution. SOLUTION: The three dimensional dose distribution of a measured object 12 is determined by measuring a dose with directing a compound radiation detector probe 10, where two or more pieces of radiation detectors 14 with directivity are mutually separated to be placed, from the differential positions to a measured object 12. The radiation detectors 14, where the surroundings excluding a detecting face of each radiation detector body 16 is enclosed by a radiation shielding body 18, is structured so as to reduce the influence of the radiation from other places except for the measured object 12 and Compton scattering. The radiation detector probe 10 is set so as to enable to maintain a minimum distance to a measured point. The radiation detectors 14 are preferable placed at a state where the measured point and two pieces of the detectors 14 are positioned at each apex of a regular triangle or an isosceles triangle, so as to be movable for their positions and changeable for their installation angles.