Skull counter virtual scale calibration method

The invention provides a skull counter virtual scale calibration method which comprises the following steps: (1) establishing a Chinese reference human skull digital model according to a Chinese adultmale reference voxel model; (2) performing virtual representation on the detector, and establishing a detector model with a fine structure; (3) reconstructing a coordinate system of an irradiation scene, and uniformly distributing radionuclides on the inner and outer surfaces of the forebone and the overhead bone; (4) setting a particle transport process in Geant4, and establishing a Monte Carlosimulation process; and (5) simulating and calculating the detection efficiency, and carrying out virtual scale calibration. The skull counter virtual scale calibration method provided by the invention does not need a simulation skull model containing a radioactive source to carry out experimental measurement calibration, but directly calculates a calibration coefficient by utilizing a Monte Carlomethod through establishin