Ettinger G J, Gordon G G, Goodson J M, Socransky S S, Williams R
TASC, Reading, MA.
J Clin Periodontol. 1994 Sep;21(8):540-3. doi: 10.1111/j.1600-051x.1994.tb01170.x.
An algorithm is described which provides necessary information for automated registration and computation of alveolar height for subtraction radiographic analysis. This procedure involves identification of the cemento-enamel junctions from radiographic images by incrementally comparing a characteristic image signature along computed tooth boundaries. The identification of these anatomically invariant structures provides information necessary to warp images and create automatic superimposition, correcting for geometric misalignment. The present report describes and demonstrates the feasibility of utilizing automated CEJ, edge finding and image warping algorithms to align automatically sequential radiographs and permit their subtraction.
本文描述了一种算法，该算法可为减影放射分析中牙槽高度的自动配准和计算提供必要信息。此过程涉及通过沿计算出的牙齿边界逐步比较特征图像特征，从放射图像中识别牙骨质-釉质界。识别这些解剖学上不变的结构可提供使图像变形并创建自动叠加所需的信息，以校正几何错位。本报告描述并证明了利用自动牙骨质-釉质界、边缘检测和图像变形算法自动对齐连续放射照片并允许进行减影的可行性。
