MacLennan A C
Department of Radiology, Glasgow Royal Infirmary.
Clin Radiol. 1995 Apr;50(4):265-7. doi: 10.1016/s0009-9260(05)83483-x.
The radiation dose to the lens of the eye was measured using thermoluminescent dosimeters placed over the eyelids of 82 patients undergoing coronal CT examinations of the sinuses at six CT scanning units in the West of Scotland. The lens doses were dependent upon the mAs setting of the scanner, with a mean lens dose of 70.3 mGy at 475 mAs, 17.6 mGy at 210 mAs and 4.7 mGy at 30 mAs. All coronal CT examinations of the sinuses requested for the planning of functional endoscopic sinus surgery should use a low mAs technique. The mAs setting should be locally agreed between the radiologist and ENT surgeon, depending on their joint assessment of scan quality.
在苏格兰西部的六个CT扫描单元，对82例接受鼻窦冠状位CT检查的患者，通过将热释光剂量计置于眼睑上来测量眼部晶状体的辐射剂量。晶状体剂量取决于扫描仪的毫安秒（mAs）设置，在475 mAs时平均晶状体剂量为70.3 mGy，在210 mAs时为17.6 mGy，在30 mAs时为4.7 mGy。所有为功能性鼻内镜鼻窦手术规划而要求进行的鼻窦冠状位CT检查均应采用低mAs技术。mAs设置应由放射科医生和耳鼻喉科医生根据他们对扫描质量的联合评估在当地达成一致。
