Eskridge J M, Becker G J, Rabe F E, Holden R W, Klatte E C
Radiology. 1983 Sep;148(3):703-5. doi: 10.1148/radiology.148.3.6878689.
Seventy-five pairs of digital subtraction angiogram images were evaluated for image quality by four independent observers. Each pair of images was derived from two separate injections in the same patient with only a single variable altered between injections, so that patients served as their own controls. The factors studied were contrast material iodine concentration, total volume of contrast material administered per injection, rate of contrast material injection, and catheter position. Observers consistently preferred images obtained following injection of the contrast agent with the higher concentration of iodine, following injection of the greater volume of contrast agent, and with the catheter placed in the superior vena cava rather than the basilic vein. No statistically significant difference in observer preference was found for the other categories studied.
由四名独立观察者对75对数字减影血管造影图像的图像质量进行评估。每对图像来自同一患者的两次单独注射，两次注射之间仅改变一个变量，因此患者自身作为对照。研究的因素包括造影剂碘浓度、每次注射给予的造影剂总体积、造影剂注射速率和导管位置。观察者一致更喜欢在注射碘浓度较高的造影剂后、注射较大体积造影剂后以及导管置于上腔静脉而非贵要静脉时获得的图像。在所研究的其他类别中，未发现观察者偏好有统计学上的显著差异。
