This study aimed to estimate the cumulative radiation exposure, effective and organ dose from the recurrent computed tomography (CT) head scan during the stroke. Data was collected using a validated survey, including scanner information, patient demographic information, scan protocol, and dose indices (CTDIvol and DLP). A retrospective search of the picture archiving and communicating system (PACS) database for all the patients who underwent at least three head scans while admitted to the hospital because of stroke. Effective and organ doses are calculated by VirtualDose software based on ICRP 103. One hundred fifty-two patients underwent three to five scans during their hospitalization, which lasted from three weeks to three months. The age ranged from 45-to 76 years; males were (n = 104, 68.4%) and females were (n = 48, 35.6%). The scan range was 20.9–28.8 cm, with a mean of 24.4 ± 1.5. The mean CTDIvol and DLP values per scan were 21 ± 0.8 and 429 ± 85, respectively. The calculated effective doses for patients with three, four, and five scans were 6.4, 8.5, and 10.7 mSv, respectively. The highest organ dose is recorded in the brain and the lowest at the breast. Focusing on referring physician awareness and encouraging request justification and dose optimization for patients subject to frequent radiation exams. In addition, the cumulative effective dose should be part of training programs for referrers, radiologists and radiographers.

本研究旨在通过反复计算机断层扫描 (CT) 头部扫描估算中风期间的累积辐射暴露量、有效剂量和器官剂量。使用经过验证的调查收集数据，包括扫描仪信息、患者人口统计信息、扫描方案和剂量指数（CTDIvol 和 DLP）。对所有因中风入院时接受至少 3 次头部​​扫描的患者的图片存档和通信系统 (PACS) 数据库进行回顾性搜索。VirtualDose 软件根据 ICRP 103 计算有效剂量和器官剂量。152 名患者在住院期间接受了三到五次扫描，住院时间从三周到三个月不等。年龄从 45 岁到 76 岁不等；男性（n = 104, 68.4%）和女性（n = 48, 35.6%）。扫描范围为 20.9–28.8 cm，平均值为 24.4 ± 1.5。每次扫描的平均 CTDIvol 和 DLP 值分别为 21 ± 0.8 和 429 ± 85。3、4 和 5 次扫描患者的计算有效剂量分别为 6.4、8.5 和 10.7 mSv。最高器官剂量记录在大脑中，最低在乳房中。专注于转诊医生的意识，并鼓励对经常接受放射检查的患者进行请求理由和剂量优化。此外，累积有效剂量应成为推荐人、放射科医生和放射技师培训计划的一部分。分别。最高器官剂量记录在大脑中，最低在乳房中。专注于转诊医生的意识，并鼓励对经常接受放射检查的患者进行请求理由和剂量优化。此外，累积有效剂量应成为推荐人、放射科医生和放射技师培训计划的一部分。分别。最高器官剂量记录在大脑中，最低在乳房中。专注于转诊医生的意识，并鼓励对经常接受放射检查的患者进行请求理由和剂量优化。此外，累积有效剂量应成为推荐人、放射科医生和放射技师培训计划的一部分。