Patent ID: 7831016
Filing Date: 2010-11-09
Classification: A61B,A61N

Abstract:
1. Dosimetry apparatus for determining radiation dose applied to a target during a radiotherapy/surgery session comprises: a dosimeter configured for location in or adjacent said target during said session, output means coupled to the dosimeter, and magnetic field generating means, the dosimeter comprising at least one radiation detector means and at least one magnetic field sensor means located a predetermined distance apart, the magnetic field generator being operable to establish a magnetic field encompassing said magnetic field sensor during/throughout said radiotherapy/surgery session, the radiation detector means being arranged to sense ionizing radiation and provide a corresponding radiation level signal, the magnetic field sensor means being responsive to movement thereof relative to the magnetic field to provide a corresponding position sensor signal, and the output means being arranged to process both the radiation level signal and the position sensor signal and, in dependence thereupon, provide an indication of both the level of a radiation dose detected by the radiation detector and the location at which the dose was measured.