Wallace J A, Nair M K, Colaco M F, Kapa S F
School of Dental Medicine, University of Pittsburgh, PA, USA.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2001 Jul;92(1):93-7. doi: 10.1067/moe.2001.115974.
The purpose of this study was to evaluate the diagnostic efficacy of Ektaspeed Plus film (EPF), a charge-coupled device (CCD), and photostimulable phosphor (PSP)-based digital images for detection of simulated periapical lesions.
Lesions were simulated in the periapical areas of 24 human mandibular sections invested in acrylic using burs of sizes #1, 2, 4, and 6 and imaged using EPF, CCD, and PSP sensors. Percent correct response scores, sensitivity, and specificity values were computed for all variables. Repeated-measures analysis of variance and post hoc testing were performed to determine the effects of imaging modality, observer, and lesion sizes with respect to lesion detection.
EPF displayed the highest sensitivity and specificity, followed by PSP and CCD images (P <.001). Percent correct score was the highest for 3 of 4 observers when EPF was used. Analysis of variance revealed significance (P <.001) with respect to all variables. Observers with experience in digital image-viewing performed better than those without such experience (P <.001). Intraobserver agreement was fair (kappa = 0.5).
EPF outperformed CCD and PSP images when observers could manipulate image characteristics.
本研究旨在评估爱克发速 Plus 胶片（EPF）、电荷耦合器件（CCD）以及基于光激励发光板（PSP）的数字图像在检测模拟根尖周病变方面的诊断效能。
使用#1、2、4 和 6 号车针在 24 个包埋于丙烯酸树脂中的人类下颌骨切片的根尖区域模拟病变，并使用 EPF、CCD 和 PSP 传感器进行成像。计算所有变量的正确反应百分比得分、敏感度和特异度值。进行重复测量方差分析和事后检验，以确定成像方式、观察者和病变大小对病变检测的影响。
EPF 显示出最高的敏感度和特异度，其次是 PSP 和 CCD 图像（P <.001）。当使用 EPF 时，4 名观察者中有 3 名的正确得分百分比最高。方差分析显示所有变量均具有显著性（P <.001）。有数字图像观察经验的观察者比没有此类经验的观察者表现更好（P <.001）。观察者内一致性为中等（kappa = 0.5）。
当观察者能够操控图像特征时，EPF 的表现优于 CCD 和 PSP 图像。
