Bottenberg Peter, Truyen Bart, Boca Cristina
Vakgroep COPR, Tandheelkundig Instituut Vrije Universiteit Brussel, Bruxelles.
Rev Belge Med Dent (1984). 2007;62(1):25-32.
By computerized subtracting the grey values of geometrically corresponding pixels in consecutively taken digital X-ray images, it is possible to visualize or measure changes in radiodensity over time. This can be very useful, both in clinical and research applications, for the follow-up of tooth mineralization or bone changes. A major problem, however, resides in obtaining a sufficient geometrical standardization of the images. Several techniques have been proposed to this end, most of them still being in development, or too cumbersome to find application in daily routine.
通过计算机化地减去连续拍摄的数字X射线图像中几何对应像素的灰度值，可以可视化或测量随时间的放射密度变化。这在临床和研究应用中对于牙齿矿化或骨骼变化的随访都非常有用。然而，一个主要问题在于获得图像足够的几何标准化。为此已经提出了几种技术，其中大多数仍在开发中，或者过于繁琐而无法在日常工作中得到应用。
