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.

中文翻译：

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在脑部非增强 CT 扫描中测量眼睛晶状体的辐射剂量

辐射会对眼睛产生不良影响，包括逐渐丧失视力。在对大脑进行非增强计算机断层扫描 (CT) 扫描期间，不必要的辐射可能会到达眼睛晶状体。国际放射防护委员会规定，急性和慢性晶状体暴露的阈值为 500 毫戈瑞，公众暴露的晶状体等效剂量限值为每年 15 毫希。因此，我们在 216 名成年人中使用 NanoDots 测量了头部 CT 扫描期间眼睛晶状体的直接辐射剂量。双眼的平均吸收剂量为 33.62 mGy（标准偏差 ±12.442）。其他变量的平均值为： 管电流-时间乘积：260 mAs；剂量长度乘积：708 mGy cm 和 CT 剂量指数：35.5 mG​​y。我们的研究结果鼓励进一步研究辐射暴露和 CT 成像协议的修改。