Thornbury J R, Fryback D G, Patterson F E, Chiavarini R L
AJR Am J Roentgenol. 1978 Jan;130(1):83-7. doi: 10.2214/ajr.130.1.83.
A method using radiologists' subjective judgments was developed to compare the quality of the diagnostic image information from two different screen/film combinations (Hi Plus/RPL versus Lanex/Ortho G). A sample of 148 comparison film pairs was obtained in the course of performing 74 urograms using the two film/screen combinations. Each film pair was evaluated by three radiologists, using a blind film-reading format, in regard to:(1) anatomic diagnostic criteria visualization; (2) radiologic diagnostic certainty; (3) presence or absence of quantum mottle; and (4) prediction of which film of a pair was the rare earth screen/film combination. There was a significant difference favoring Hi Plus/RPL in perceived quality of visualization of anatomic criteria. However, the difference was more of statistical rather than practical importance. Diagnostic certainty differed only marginally and slightly favored the Hi Plus/RPL combination. No signficant differences in perception of quantum mottle were attributable to either screen/film combination. Radiologists were able to correctly identify the screen/film combination a significant proportion of the time. Radiation exposure with the Lanex/Ortho G combination was about half that with the Hi Plus/RPL combination. In this study, this would seem to constitute the major factor in film/screen selection.
开发了一种利用放射科医生主观判断的方法，以比较来自两种不同增感屏/胶片组合（Hi Plus/RPL与Lanex/Ortho G）的诊断图像信息质量。在使用这两种胶片/增感屏组合进行74例尿路造影的过程中，获得了148对比较胶片样本。每对胶片由三名放射科医生采用盲法读片的方式进行评估，评估内容包括：（1）解剖诊断标准的可视化；（2）放射学诊断的确定性；（3）量子斑点的有无；（4）预测一对胶片中哪一张是稀土增感屏/胶片组合。在解剖标准可视化的感知质量方面，Hi Plus/RPL组合具有显著优势。然而，这种差异更多的是统计学上的，而非实际重要性方面的。诊断确定性仅有微小差异，且Hi Plus/RPL组合略占优势。在量子斑点的感知方面，两种增感屏/胶片组合均未表现出显著差异。放射科医生在很大比例的情况下能够正确识别增感屏/胶片组合。Lanex/Ortho G组合的辐射暴露约为Hi Plus/RPL组合的一半。在本研究中，这似乎是胶片/增感屏选择的主要因素。
