Alwasiah Reem, Jawhari Abdulkarim, Orri Rafal Al, Khafaji Mawya, Al Bahiti Sarah
Department of Radiology, King Fahad General Hospital, Jeddah, Saudi Arabia.
Faculty of Medicine, King Abdulaziz University Jeddah, Saudi Arabia.
Radiat Prot Dosimetry. 2021 Aug 14;195(1):56-60. doi: 10.1093/rpd/ncab118.
Radiation can have undesirable effects on the eye, including a gradual loss of vision. Unnecessary radiation can reach the eye lens during non-enhanced computed tomography (CT) scans of the brain. The International Commission on Radiological Protection states the threshold for acute and chronic eye lens exposure is 500 mGy and the equivalent dose limit for the eye lens for public exposure is 15 mSv per year. Therefore, we measured the direct radiation dose to the eye lens during head CT scans using NanoDots in 216 adults. The mean absorbed dose to both eyes was 33.62 mGy (standard deviation ±12.442). The averages for the other variables were: tube current-time product: 260 mAs; dose-length product: 708 mGy cm and CT dose index: 35.5 mGy. Our findings encourage further study of radiation exposure and modifications in CT imaging protocols.
辐射会对眼睛产生不良影响，包括视力逐渐丧失。在脑部非增强计算机断层扫描（CT）期间，不必要的辐射会到达眼球晶状体。国际放射防护委员会指出，急性和慢性眼球晶状体暴露的阈值为500毫戈瑞，公众暴露的眼球晶状体等效剂量限值为每年15毫希沃特。因此，我们使用纳米点测量了216名成年人头部CT扫描期间眼球晶状体的直接辐射剂量。双眼的平均吸收剂量为33.62毫戈瑞（标准差±12.442）。其他变量的平均值为：管电流-时间乘积：260毫安秒；剂量长度乘积：708毫戈瑞·厘米；CT剂量指数：35.5毫戈瑞。我们的研究结果鼓励进一步研究辐射暴露以及CT成像方案的改进。
