Groenhuis R A, Webber R L, Ruttimann U E
Oral Surg Oral Med Oral Pathol. 1983 Aug;56(2):206-14. doi: 10.1016/0030-4220(83)90289-x.
A digital method that produces an arbitrary number of tomographic slices from a finite number of dental radiographs is described. The relation between the slice thickness of the tomograms, the number of radiographs required, and the tomographic angle is determined on the basis of existing theory. In order to test the method, a series of radiographs of a radiographic phantom were taken and subsequently digitized to facilitate computer processing. From eight radiographs with an angular disparity of 4.5 degrees, tomograms with a slice thickness of about 3 mm, were produced. These not only indicate the relative position of the dental tissues in space but also show clinical relationships that are not visible in the original radiographs.
本文描述了一种数字方法，该方法可从有限数量的牙科X光片中生成任意数量的断层切片。根据现有理论确定了断层图像的切片厚度、所需X光片数量和断层角度之间的关系。为了测试该方法，拍摄了一系列X光体模的X光片，随后进行数字化处理以方便计算机处理。从八张角度相差4.5度的X光片中，生成了切片厚度约为3毫米的断层图像。这些图像不仅显示了牙齿组织在空间中的相对位置，还展示了原始X光片中不可见的临床关系。
