论文部分内容阅读
2.3 减影处理DR 装置用的减影处理有时差法、能差法、时能混差法。时差法的原理众所周知,制备造影前的图象 Dm(X、Y、Tm)与造影后的图象 D_L(X、Y、T_L)的减影图象,除去骨骼及脏器等背景结构,只显示出诊断需要的造影血管。时差法的图象处理与 DF 有关,拟在下讲介绍。下面介绍能差法及混差法的图象处理
2.3 Subtraction Processing The subtraction processing for the DR unit includes the time difference method, the difference method, and the time difference method. The principle of the time difference method It is well known that the subtraction images of the pre-contrast image Dm (X, Y, Tm) and the post-contrast image D_L (X, Y, T_L) are prepared to remove background structures such as bones and organs Shows the need for diagnostic angiography. The time difference method of image processing and DF, to be introduced in the next. The following describes the difference method and the difference between the method of image processing