Leong David L, Rainford Louise, Haygood Tamara Miner, Whitman Gary J, Geiser William R, Stephens Tanya W, Davis Paul L, Brennan Patrick C
J Opt Soc Am A Opt Image Sci Vis. 2014 Nov 1;31(11):2328-33. doi: 10.1364/JOSAA.31.002328.
Current literature shows that radiologist experience does not affect detection tasks when the object does not require medical training to detect. However, the research was never sufficiently detailed to examine if the contrast detection threshold is also the same for radiologists versus nonradiologists. Previously, contrast threshold research was performed predominantly on nonradiologists. Therefore, any differences could lead to over- or under-estimation of the performance capabilities of radiologists. Fourteen readers, evenly divided between radiologists and nonradiologists, read a set of 150 mammogram-like images. The study was performed with the location of the objects known and unknown, requiring two separate readings. No difference in the contrast detection threshold between reader groups for either the location-unknown (4.9 just noticeable differences) or location-known (3.3 just noticeable differences) images was seen. The standard deviation for the location-unknown condition had no difference (p 0.91). But for the location-known condition, a significant difference (p 0.0009) was seen between radiologists and nonradiologists. No difference in contrast detection based on reader experience was observed, but decreased variance was seen with radiologists in the location-known condition.
当前文献表明，当检测对象无需医学培训即可被检测到时，放射科医生的经验不会影响检测任务。然而，该研究从未详细到足以检验放射科医生与非放射科医生的对比度检测阈值是否也相同。此前，对比度阈值研究主要在非放射科医生身上进行。因此，任何差异都可能导致对放射科医生性能能力的高估或低估。14名读者，放射科医生和非放射科医生各占一半，阅读了一组150张类似乳腺X光片的图像。该研究在对象位置已知和未知的情况下进行，需要进行两次单独阅读。在位置未知（4.9个刚刚可察觉差异）或位置已知（3.3个刚刚可察觉差异）的图像中，读者组之间的对比度检测阈值均未发现差异。位置未知条件下的标准差没有差异（p = 0.91）。但在位置已知条件下，放射科医生和非放射科医生之间存在显著差异（p = 0.0009）。未观察到基于读者经验的对比度检测差异，但在位置已知条件下，放射科医生的方差有所降低。
