乌克兰计算机断层扫描实践调查及建立成人最常见 CT 检查的国家诊断参考水平。

SURVEY OF COMPUTED TOMOGRAPHY PRACTICE IN UKRAINE AND ESTABLISHMENT OF NATIONAL DIAGNOSTIC REFERENCE LEVELS FOR MOST COMMON CT EXAMINATIONS OF ADULTS.

机构信息

Central Laboratory of Radiation Safety and Dosimetry of Medical Exposure, Grigorev Institute for Medical Radiology and Oncology, 82 Pushkinska Street, Kharkiv 61024, Ukraine.

Department of Diagnostic Radiology, Dalhousie University, PO BOX 9000, 1276 South Park Street, Halifax, NS B3H 2Y9, Canada.

出版信息

Radiat Prot Dosimetry. 2023 Jun 23;199(10):1142-1150. doi: 10.1093/rpd/ncad157.

DOI:10.1093/rpd/ncad157

PMID:37220643

Abstract

This study reports results of the first nationwide survey of computed tomography (CT) practice in Ukraine and proposed national diagnostic reference levels (DRLs) for common CT examinations. The collected data included characteristics of CT scanners, frequency of CT exams per anatomical region, dose indices CTDIvol and dose-length product (DLP). National DRLs were proposed at the 75th percentile of median dose indices distributions for four common CT protocols: head without contrast (brain examinations for stroke and trauma), routine chest without contrast, single-phase contrast-enhanced CT of abdomen and pelvis and oncology protocol (chest-abdomen-pelvis). The results showed 4- to 9-fold variations of median dose indices between CT scanners for the same type of examination. The following values of the CTDIvol and DLP were proposed as national DRLs: 59 mGy and 1130 mGy•cm for head, 14 mGy and 492 mGy•cm for chest, 22 mGy and 845 mGy•cm for abdomen/pelvis and 2120 mGy•cm for oncological protocol.

摘要

本研究报告了乌克兰首次全国范围的计算机断层扫描（CT）实践调查结果，并提出了常见 CT 检查的国家诊断参考水平（DRL）。收集的数据包括 CT 扫描仪的特点、每个解剖区域的 CT 检查频率、剂量指标 CT DIvol 和剂量长度乘积（DLP）。在四个常见 CT 方案的中位数剂量指标分布的第 75 百分位数处提出了国家 DRL：头部无对比（中风和创伤的脑部检查）、常规胸部无对比、腹部和骨盆单期增强 CT 以及肿瘤学方案（胸部-腹部-骨盆）。结果表明，对于相同类型的检查，不同 CT 扫描仪之间的中位数剂量指标存在 4 到 9 倍的差异。提出了以下 CTDIvol 和 DLP 值作为国家 DRL：头部为 59 mGy 和 1130 mGy•cm，胸部为 14 mGy 和 492 mGy•cm，腹部/骨盆为 22 mGy 和 845 mGy•cm，肿瘤学方案为 2120 mGy•cm。