Morota Koichi, Moritake Takashi, Nagamoto Keisuke, Matsuzaki Satoru, Nakagami Koichi, Sun Lue, Kunugita Naoki
Department of Radiology, Shinkomonji Hospital, 2-5 Dairishinmachi, Moji-ku, Kitakyushu, Fukuoka 800-0057, Japan.
Department of Radiobiology and Hygiene Management, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, Fukuoka 807-8555, Japan.
Diagnostics (Basel). 2020 Dec 23;11(1):14. doi: 10.3390/diagnostics11010014.
Understanding the maximum skin dose is important for avoiding tissue reactions in cerebral angiography. In this study, we devised a method for using digital imaging and communication in medicine-radiation dose structured report (DICOM-RDSR) data to accurately estimate the maximum skin dose from the total air kerma at the patient entrance reference point (Total K). Using a test data set ( = 50), we defined the mean ratio of the maximum skin dose obtained from measurements with radio-photoluminescence glass dosimeters (RPLGDs) to the Total K as the conversion factor, CF, and compared the accuracy of the estimated maximum skin dose obtained from multiplying Total K by CF (Estimation Model 1) with that of the estimated maximum skin dose obtained from multiplying Total K by the functional conversion factor CF (Estimation Model 2). Estimation Model 2, which uses the quadratic function for the ratio of the fluoroscopy K to the Total K (K ratio), provided an estimated maximum skin dose closer to that obtained from direct measurements with RPLGDs than compared with that determined using Estimation Model 1. The same results were obtained for the validation data set ( = 50). It was suggested the quadratic function for the K ratio provides a more accurate estimate of the maximum skin dose in real time.
了解最大皮肤剂量对于避免脑血管造影中的组织反应至关重要。在本研究中，我们设计了一种利用医学数字成像和通信-辐射剂量结构化报告（DICOM-RDSR）数据的方法，以根据患者入口参考点处的总空气比释动能（Total K）准确估算最大皮肤剂量。使用一个测试数据集（n = 50），我们将用放射光致发光玻璃剂量计（RPLGDs）测量得到的最大皮肤剂量与Total K的平均比值定义为转换因子CF，并将通过将Total K乘以CF得到的估计最大皮肤剂量（估计模型1）的准确性与通过将Total K乘以功能转换因子CF得到的估计最大皮肤剂量（估计模型2）的准确性进行比较。估计模型2使用透视比释动能与Total K的比值（K比值）的二次函数，与使用估计模型1确定的结果相比，其提供的估计最大皮肤剂量更接近通过RPLGDs直接测量得到的结果。验证数据集（n = 50）也得到了相同的结果。结果表明，K比值的二次函数能够实时更准确地估计最大皮肤剂量。
