TISSUE EQUIVALENCE CORRECTION FOR SILICON MICRODOSIMETRY DETECTORS INBORON NEUTRON-CAPTURE THERAPY

Reverse-biased silicon p-n junction arrays have been proposed as micro dosimetry detectors. The tissue equivalence of such detectors in boron neutron capture therapy (BNCT) is discussed. A comparison of the rang e-energy relationships of H, He, C, and Li ions in tissue (ICRU-muscle ) and silicon is given. A simple geometrical scaling (similar to 0.63) of linear dimensions is required to convert microdosimetric energy de position measurements performed in silicon to equivalent deposition in tissue. The Monte Carlo technique is used to examine energy depositio n for two simple geometrical cases applicable to BNCT. (C) 1998 Americ an Association of Physicists in Medicine. [S0094-2405(98)00710-X].