Investigation of the clinical performance of a novel solid-state diagnostic dosimeter.
Investigation of the clinical performance of a novel solid-state diagnostic dosimeter.
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DOI：
10.1120/jacmp.v16i4.5439
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发表时间：
2015-07-08
影响因子：
2.1
通讯作者：
McLean D
中科院分区：
文献类型：
--
作者：
Tse J;McLean D
本研究通过将新型固态诊断剂量计RaySafe Xi透明探测器的性能与参考级电离室进行比较，研究了其临床性能。首先，对“自由空气”剂量计响应与标准射束质量进行了比较，然后对其在X射线场中的相对透明度和角度灵敏度依赖性进行了研究。本研究的第二部分考察了透明探测器在散射条件下的整体性能，具有多种射束质量，包括标准射束和通过厚度高达0.9 mm的铜（Cu）过滤硬化的射束，如在荧光透视系统的设备测试中遇到的。总体而言，透明探测器已证明在标准条件下与电离室具有等同的测量特性，并提供了相似的X射线衰减，这反映在自动剂量率控制（ADRC）系统为两种剂量计选择的几乎相同的射线照相参数上。然而，它也具有不对称的角度响应，分别低估和高估了来自后方和侧向的剂量贡献，两者相差50%。透明探测器提供了与电离室相当的剂量阅读，具有标准射束质量和存在的反向散射辐射。这些结果与空气中自由测量的结果非常一致，表明角度响应不足和过度响应可能会相互补偿，以实现精确测量。然而，对于相同的Cu过滤光束质量和设置，透明检测器在有用的管电压范围内平均过度响应5.4%。总之，透明检测器，其新颖的设计，基本上是等同的，在5%的公差，电离室，除了在使用的情况下，与铜过滤硬化的光束与反向散射辐射存在需要更大的不确定性误差估计。PACS编号：87.57 uq、87.59.C‐、87.59.Dj
This study investigated the clinical performance of a novel solid‐state diagnostic dosimeter, the RaySafe Xi transparent detector, by comparing its performance to a reference‐class ionization chamber. Firstly a comparison of dosimeter response “free‐in‐air” with standard beam qualities was made, followed by an investigation into its relative transparency in an X‐ray field and angular sensitivity dependence. The second part of the study looked at the overall performance of the transparent detector under scatter conditions with a number of beam qualities, including standard beam and those hardened by copper (Cu) filtration of thickness up to 0.9 mm, as would be encountered in the equipment testing of fluoroscopy systems. Overall, the transparent detector has demonstrated equivalent measurement properties to the ionization chamber under standard conditions and provided similar X‐ray attenuation as reflected by the nearly identical radiographic parameters selected for both dosimeters by the automatic dose rate control (ADRC) system. Yet, it also possessed an asymmetric angular response which respectively under‐ and overestimated the dose contribution from the rear and lateral directions by the same amount of 50%. The transparent detector provided comparable dose reading of to the ionization chamber with standard beam qualities and backscatter radiation present. These results were in good agreement with those of free‐in‐air measurement, indicating that the angular under‐ and overresponse might potentially compensate one another for accurate measurement. However, for identical Cu filtered beam qualities and setups, the transparent detector on average overresponded by 5.4% across the useful tube voltage range. In conclusion, the transparent detector, with its novel design, is essentially equivalent, within a 5% tolerance, to an ionization chamber, except in situations where beams hardened with Cu filtration are used with backscatter radiation present requiring larger uncertainty error estimations. PACS numbers: 87.57 uq, 87.59.C‐, 87.59.Dj
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影响因子：
3.5
作者：
Benmakhlouf, Hamza;Bouchard, Hugo;Andreo, Pedro
通讯作者：
Andreo, Pedro
影响因子：
2.2
作者：
Hourdakis, Costantine John;Boziari, Argyro;Manetou, Aggeliki
通讯作者：
Manetou, Aggeliki
影响因子：
3.5
作者：
Martin, C. J.
通讯作者：
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影响因子：
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作者：
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通讯作者：
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