Cann C E
Radiology. 1981 Sep;140(3):813-5. doi: 10.1148/radiology.140.3.7280252.
The effect of x-ray exposure on the precision of quantitative CT bone mineral measurements was determined using excised vertebrae and phantoms. Specimens were scanned at 80 kVp with exposures ranging from 23 to 380 mAs using the UCSF/GE research scanner, a modified GE CT/T 7800. Dose was measured using thermoluminescent dosimeters. A patient exposure of 100 mrem (10(-3) Sv) was judged adequate to provide useful quantitative vertebral mineral measurements with this scanner.
使用切除的椎骨和模型确定了X射线照射对定量CT骨矿物质测量精度的影响。使用UCSF/GE研究扫描仪（一种改良的GE CT/T 7800），在80 kVp下对标本进行扫描，曝光量范围为23至380 mAs。使用热释光剂量计测量剂量。对于该扫描仪而言，100 mrem（10(-3) Sv）的患者照射量被判定为足以提供有用的定量椎体矿物质测量结果。
