| Zhang Hui,Wang Pingquan,Yang Junkai,et al.A detection method for relative response of a detector matrix[J].Chinese Journal of Radiological Medicine and Protection,2022,42(10):799-805 |
| A detection method for relative response of a detector matrix |
| Received:April 20, 2022 |
| DOI：10.3760/cma.j.cn112271-20220420-00167 |
| KeyWords:Detector matrix Relative response Radiation field Translation Recursive algorithm |
| FundProject:中国计量科学研究院重点领域基本业务费项目剂量分布测量设备计量技术研究(AKYZD1908-2) |
|
| Hits: 2624 |
| Download times: 1368 |
| Abstract:: |
| Objective To test the relative response of a detector matrix used for measuring of the dose distribution in radiotherapy in order to ensure the accuracy and reliability of dose distribution measurement result.Methods The two adjacent detectors can be irradiated at the same radiation dose by translating the detector matrix. The relative response of each detector to the reference detector can be obtained by combining the recursive algorithm. At the same time, the measurement data at different test steps are corrected to the reference step by setting the reference step, which correct the influence on the relative response result caused by the variation of the radiation condition and the detector response.Results Based on the actual test of a 32 × 32 detector matrix, the relative response of each detector of the detected detector matrix to the reference detector varied from 0.896 to 1.077, with the expanded uncertainty of the relative response result being 0.8% (k=2).Conclusions On the premise of no known distribution of a radiation field, the relative response relationship of each detector of a detector matrix can be obtained by this method accurately and expediently, which provides a basic method for the performance evaluation of the detector matrix. The same idea can also be used to determine the relative response relationship of other detector matrices for different measurement purposes. |
| HTML View Full Text View/Add Comment Download reader |
| Close |
|
|
|
