Kassebaum D K, McDavid W D, Dove S B, Waggener R G
University of Colorado Health Sciences Center, Denver.
Oral Surg Oral Med Oral Pathol. 1989 Jun;67(6):760-9. doi: 10.1016/0030-4220(89)90021-2.
A study was performed to determine the appropriate spatial resolution for digitizing and transmitting dental radiographs with the KODAK EKTASCAN, a computer-based digital enhancement and transmission system. Periapical, bitewing, and panoramic radiographs were digitized in three formats representing varying spatial resolution parameters. Eight viewers used a 5-point rating scale to evaluate the detectability of periapical pathosis on the periapical images, of proximal surface caries on the bitewing images, and of various bony abnormalities on the panoramic images. Receiver operating characteristic curves were generated, and the results of the periapical, bitewing and panoramic experiments were presented as trapezoidal and maximum likelihood receiver operating characteristic curve areas. The results of this study indicate that digital images of dental radiographs provide adequate diagnostic accuracy for evaluating the presence of periapical pathosis, proximal surface caries, and specified bony abnormalities. The digitization parameters established for the KODAK EKTASCAN provide a guide for digitizing dental radiographs on other commercially available digital image-processing systems.
开展了一项研究，以确定使用柯达EKTASCAN（一种基于计算机的数字增强和传输系统）对牙科X光片进行数字化和传输时的合适空间分辨率。根尖片、咬合翼片和全景片以三种代表不同空间分辨率参数的格式进行数字化处理。八名观察者使用5分制评分量表，评估根尖片上根尖周病变的可检测性、咬合翼片上邻面龋的可检测性以及全景片上各种骨质异常的可检测性。生成了受试者工作特征曲线，根尖片、咬合翼片和全景片实验的结果以梯形和最大似然受试者工作特征曲线面积表示。本研究结果表明，牙科X光片的数字图像在评估根尖周病变、邻面龋和特定骨质异常的存在时具有足够的诊断准确性。为柯达EKTASCAN确定的数字化参数为在其他商用数字图像处理系统上对牙科X光片进行数字化处理提供了指导。
