The kerma-area product meter (KAP meter) is mainly used for quality assurance in medical imaging research, providing dose quality assessment or dose monitoring for patients. It can be calibrated either in the laboratory or on-site. The purpose of this study is to propose a method for calibrating the KAP meter using a plane-parallel transmission ionization chamber in the SSDLs. In the range of 50 kV–150 kV, under RQR (standard radiation qualities) and RQR additional filtering conditions of the KAP meter, the correction factor NQm of the transmission ionization chamber is calculated to select two types of KAP meters for the calibration of the transmitted beam. The collimators used to limit the size of the radiation field are respectively 50.07 mm in length, 30.03 mm in length, and 20.05 mm in radius. This method, with uncertainty not exceeding 3.0% while improving calibration efficiency, can replace the unit-specific correction of the laboratory method (Toroi et al., 2008).

中文翻译：

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Kerma-Area 乘积仪的 SSDL 校准方法


比尔玛面积乘积仪（KAP meter）主要用于医学影像学研究中的质量保证，为患者提供剂量质量评估或剂量监测。它可以在实验室或现场校准。本研究的目的是提出一种使用 SSDL 中的平面平行传输电离室校准 KAP 仪表的方法。在 50 kV–150 kV 范围内，在 KAP 仪表的 RQR（标准辐射质量）和 RQR 附加滤波条件下，计算传输电离室的校正系数 NQm，以选择两种类型的 KAP 仪表来校准传输光束。用于限制辐射场大小的准直器的长度分别为 50.07 mm、30.03 mm 和 20.05 mm。该方法在提高校准效率的同时，不确定度不超过 3.0%，可以替代实验室方法的特定单元校正（Toroi et al.， 2008）。