Evaluation of the EDGE detector in small-field dosimetry
Evaluation of the EDGE detector in small-field dosimetry
复制标题
EDGE 探测器在小场剂量测定中的评估
DOI：
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
C. Kay
中科院分区：
文献类型：
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作者：
Hun;M. Kim;I. Choi;Y. Kang;D. Kim;Byung Ock Chio;H. Jang;Jinwook Jung;S. Son;C. Kay
这项研究评估了一种用于小场剂量测定的新型二极管探测器设计。需要体积小的精确探测器来收集立体定向放射外科 (SRS)、立体定向放射治疗 (SBRT) 和调强放射治疗 (IMRT) 的数据。使用两个半导体二极管探测器和一个电离室来测量 Novalis 6-MV SRS 光束的轮廓、百分比深度剂量 (PDD) 和相对输出因子 (OF)。使用 5.0、10.0、15.0、20.0、30.0 和 50.0 mm 微型多叶准直器 (mMLC) 在小视场和 98.0 × 98.0 mm2 参考视场收集轮廓和 PDD 数据。为每个 mMLC 收集 OF。研究中使用了 EDGE 二极管检测器、二极管检测器和电离室 (0.007 cc)。使用 3D 水模型进行探测器测量，源到表面距离为 100 厘米，深度为 1.5 厘米。使用 IBA OmniPro Accept 第 7 版软件对测量结果进行分析。此外，所有数据都与蒙特卡罗模拟进行了比较。对于所使用的每个 mMLC，半导体二极管具有相似的 OF 和 PDD。从 PDD 测量的 EDGE 二极管检测器的 Dmax 值范围为 8.5 至 14.0 毫米，平均值为 12.4 毫米。发现 EDGE 二极管检测器的场宽具有相似的值。 EDGE 二极管检测器的性能对于所有小场测量来说都是相当的。此外，对于 98 × 98-mm2 的区域，没有观察到 EDGE 探测器的能量响应证据。当测量小田地的相对 OF 或收集较大规模的田地数据以调试治疗计划系统时，这一点尤其重要。
This study evaluates a new diode detector design for small-field dosimetry. An accurate detector that has a small volume are necessary to compile data for stereotactic radiosurgery (SRS), stereotactic body radiotherapy (SBRT), and intensity-modulated radiotherapy (IMRT). Two semiconductor diode detectors and one ionization chamber were used to measure the profiles, percent depth doses (PDDs), and relative output factors (OFs) of a Novalis 6-MV SRS beam. Profiles and PDD data were collected using 5.0-, 10.0-, 15.0-, 20.0-, 30.0-, and 50.0-mm micro multileaf collimators (mMLCs) at small fields and a 98.0 × 98.0-mm2 reference field. OFs were collected for each of the mMLCs. The EDGE diode detector, the diode detector, and the ion chamber (0.007 cc) were used in the study. Detector measurements were performed using the 3D water phantom with a source-to-surface distance of 100-cm at a depth of 1.5-cm. The measurements were analyzed using the IBA OmniPro Accept 7th version software. In addition, all data were compared to Monte Carlo simulations. The semiconductor diodes had similar OFs and PDDs for each of the mMLCs used. The Dmax values of the EDGE diode detector, measured from the PDD, ranged from 8.5 to 14.0-mm with an average of 12.4-mm. The field widths of the EDGE diode detector were found to have similar values. The performance of the EDGE diode detector was comparable for all small-field measurements. Additionally, no evidence of an energy response was observed for the EDGE detectors for a field of 98 × 98-mm2. This is particularly important when measuring the relative OF for small fields or gathering larger-sized field data for the commissioning of a treatment planning system.
影响因子：
3.8
作者：
ROGERS, DWO;FADDEGON, BA;MACKIE, TR
通讯作者：
MACKIE, TR