The aim of this study was to estimate the effective doses (EDs) to children undergoing pediatric interventional cardiology examinations in hospitals of St.-Petersburg, to calculate associated dose conversion coefficients (DCCs) and to investigate their dependence of different parameters of the various procedures. Basic parameters of pediatric cardiology examinations and patient doses were studied in three main pediatric city hospitals. More than 300 examinations were under consideration. The technical, geometrical and dosimetric parameters, as well as patients’ parameters, for each individual procedure were collected. All cardiac examinations were divided into five age groups (newborn, 1, 5, 10 and 15 y old). The EDs and the corresponding DCCs from the dose-area product to ED were calculated using PCXMC 2.0 software and based on the collected data. The study included the evaluation of the relations between the DCCs, patient age and parameters of examinations. The results of the study indicated significant dependence of the DCCs on the patients’ age and the beam quality. The DCCs for the newborns and 15-year old groups differed by a factor of 10. The maximum estimated ED of 26 mSv was found in the newborn age group.

中文翻译：

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小儿介入心脏病学中的有效剂量

本研究的目的是估计在圣彼得堡医院接受儿科介入心脏病学检查的儿童的有效剂量 (EDs)，计算相关的剂量转换系数 (DCCs) 并调查它们对各种程序的不同参数的依赖性. 在三个主要的儿科城市医院研究了儿科心脏病学检查和患者剂量的基本参数。超过 300 项考试正在考虑中。收集了每个单独程序的技术、几何和剂量学参数以及患者参数。所有心脏检查分为五个年龄组（新生儿、1 岁、5 岁、10 岁和 15 岁）。使用 PCXMC 2.0 软件并基于收集的数据计算从剂量面积乘积到 ED 的 ED 和相应的 DCC。该研究包括评估 DCC、患者年龄和检查参数之间的关系。研究结果表明 DCC 对患者年龄和光束质量的显着依赖性。新生儿和 15 岁组的 DCC 相差 10 倍。在新生儿组中发现最大估计 ED 为 26 mSv。