Brägger U, Pasquali L, Rylander H, Carnes D, Kornman K S
University of Texas Health Science Center, Department of Periodontics and Computing Resources, San Antonio.
J Clin Periodontol. 1988 Jan;15(1):27-37. doi: 10.1111/j.1600-051x.1988.tb01551.x.
A videobased computer assisted densitometric image analysis (CADIA) system to quantify alveolar bone density changes on standardized dental radiographs was tested. An algorithm was used for grey level correction of a subsequent image to the baseline image. Quantitative information regarding positive and/or negative grey level changes were obtained automatically. Comparison of the ability of CADIA to detect surgically induced bone loss with interpretation of digital subtraction images and conventional radiographic interpretation revealed that CADIA was the most sensitive of the 3 methods, followed by interpretation of digital subtraction images which was considerably more sensitive than conventional radiographic interpretation. CADIA was capable of assessing differences in alveolar bone changes due to periodontal surgery between sites exposed to ostectomy/osteoplasty and control sites and sites exposed to periodontal surgery without ostectomy/osteoplasty. Finally, CADIA was capable of assessing differences in remodeling activity over 4-6 weeks after periodontal surgery between 45 surgical sites and 45 control sites. The system offers an objective method to quantitatively follow alveolar bone density changes over time and appears to be the most sensitive of previously described radiographic interpretation techniques.
测试了一种基于视频的计算机辅助密度测量图像分析（CADIA）系统，用于量化标准化牙科X光片上的牙槽骨密度变化。使用一种算法对后续图像相对于基线图像进行灰度校正。自动获取有关正和/或负灰度变化的定量信息。将CADIA检测手术引起的骨质流失的能力与数字减影图像解释和传统放射学解释进行比较，结果显示CADIA是这三种方法中最敏感的，其次是数字减影图像解释，其比传统放射学解释敏感得多。CADIA能够评估接受骨切除术/骨成形术的部位与对照部位以及接受无骨切除术/骨成形术的牙周手术部位之间，由于牙周手术导致的牙槽骨变化差异。最后，CADIA能够评估45个手术部位和45个对照部位在牙周手术后4至6周内的重塑活动差异。该系统提供了一种客观方法来定量跟踪牙槽骨密度随时间的变化，并且似乎是先前描述的放射学解释技术中最敏感的。
