On the Instantaneous Dose Rate and Angular Dependence of Monolithic Silicon Array Detectors
Giordano Biasi, Nicholas Hardcastle, Marco Petasecca, Susanna Guatelli, Vladimir Perevertaylo, Tomas Kron, Anatoly B Rosenfeld
IEEE TRANSACTIONS ON NUCLEAR SCIENCE | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC | Published : 2019
The use of small radiation fields characterized by very steep dose gradients is common in modulated arc X-ray radiotherapy. Dosimeters for quality assurance (QA) applications would ideally have sensitive volumes (SVs) relatively small with respect to the field, along with negligible instantaneous dose rate and angular dependence. Silicon-based dosimeters can be fabricated with SVs < 100μm across, provide a stable and near energy-independent response in megavoltage photon beams, along with a good linearity with accumulated dose and real-time readout. However, their sensitivity is instantaneous dose rate and angular dependent. Monolithic silicon array detectors with sufficiently small SVs and ..View full abstract
This work was supported by the Gross Foundation, Melbourne, Australia.