Dosimeter for use in medical radiotherapy of patient, to determine absorbed dose of radiation field, has sensor, where measured variable related to absorbed dose stored in volume of sensor is determined from two rough measured values

摘要

The dosimeter (10) has an evaluation unit (20) determining time interval of a radiation field (26) and detecting measuring points of voltage corresponding to the electrical charge relative to the time interval of constant times so that two rough measured values are received per time interval. A line (18) e.g. coaxial cable, is made of carbon fibers or plastic fibers and transfers the electrical charge. A measured variable related to an absorbed dose stored in a sensor volume of a sensor (14) i.e. semiconductor sensor, in a dosimeter probe (12) is determined from the two rough measured values. An independent claim is also included for a method for determining an absorbed dose of a pulsed radiation field.