Takahashi M, Shinzato J, Korogi Y, Fukui K, Ueno S, Horiba I, Suzumura N
Department of Radiology, Kumamoto University School of Medicine, Japan.
Acta Radiol Suppl. 1986;369:281-4.
A new automatic computer program, to remove misregistration artifacts secondary to motions such as rotation, contraction and relaxation of the body, has been developed. This program is called automatic reregistration and consists of determination of distortion vectors of corresponding segments of the mask and live images by detection of the peak value of two-dimensional cross correlation, followed by obtaining distortion vectors of other pixels through interpolation. Shift of the coordinate of the distorted live image is subtracted. Clinical evaluation of this new program, in comparison with already developed remasking and manual reregistration, have proved that some misregistration artifacts, uncorrectable by the latter two methods, have been removed to some extent. The new program has proven to be clinically useful.
一种新的自动计算机程序已被开发出来，用于消除因身体旋转、收缩和放松等运动产生的配准错误伪影。该程序被称为自动重新配准，它通过检测二维互相关的峰值来确定掩码图像和实时图像相应部分的畸变向量，然后通过插值获得其他像素的畸变向量。减去畸变实时图像坐标的偏移量。与已开发的重新掩码和手动重新配准相比，对这个新程序的临床评估证明，后两种方法无法校正的一些配准错误伪影已在一定程度上被消除。新程序已被证明在临床上有用。
