| 摘要 |
The detector (20) includes several adjacent detector elements each defining a limited detection area and each being configured to produce an individual current dependent upon the radiaiton dose in each respective area. A means (34-36) is provided for measuring each individual current to obtain data used to create an expression over the dose distribution in at least two dimensions. A radiation detector unit for determining the radiation dose distribution or rate from at least one radiation source (2) comprises a detector in which a current induced by the radiation source is dependent on the dose, and a means for measuring the induced current. The detector includes several adjacent detector elements each defining a limited detection area and each being configured to produce an individual current dependent upon the radiaton dose in each respective area. A means is provided for measuring each individual current to obtain data used to create an expression over the dose distribution in at least two dimensions. Independent claims are also included for (a) a radiation dose detection system for verification or calibration of radiosurgical equipment, comprising one or more radiation sources, a control system, a means for registering radiation doses, a means for combining the doses to generate a dose distribution, and the above detector unit, and (b) a method for generating a three-dimensional radiation dose distribution from at least one radiation source. INSTRUMENTS AND TESTING - CLAIMED METHOD: The detector unit is moved from a starting position to a region near the radiation source, where it is exposed to radiation from the source for a given time period, and then the unit is returned to its starting position. A set of radiation dose values are built up for a number of detection areas and combined into a three-dimensional distribution. |
