Development of mathematical phantoms fbr calculating internal doses from radiopharmaceuticals using patients' digital picture of bone scintillation

We made a new mathematical phantom using the patients' digital pictures of bone scintillation in nuclear medicine. The data of Tc-99m bone scintillation pictures include the information on the body sizes and shapes. In the bone scintillation pictures, no three-dimensional data are available, so that the shapes and sizes of whole body and bones were modelled based on standard anatomical geometry. The organs except bone were also modelled after construction of the bone mathematical model. The mathematical phantoms were developed for each patient. The specific effective energy for each phantom can be calculated by the Monte Carlo code to compare it among the patients. Our mathematical phantoms would provide new calculation of internal doses from radiopharmaceuticals in place of the MIRD phantom.