subtraction imaging meaning in English

减影成像
减影显像

In this paper , the author studies the kernel arithmetic of the digital subtraction image processing in digital subtraction angiography system
本课题对数字剪影血管造影dsa系统中数字剪影图象处理系统的核心算法进行了研究。
In the image quantization and enhancement section , the non - linear gray mapping based on histogram specification and the enhancement digital filter in spatial domain is applied to the result digital subtraction images
对于获得的数字剪影结果图象采用了规定化直方图的非线性灰度变换算法，同时对于结果图象的增强设计了空域数字滤波器。
In the de - noise part , the author firstly proved that the snr of the live image can be improved by integrating several images . because the subtraction images are image sequences , which related to time , so in the arithmetic realization , different images are integrated after assigning different weight that is convenient for optimization
在降噪的处理过程中首先从理论分析中证明了通过积分累加可以使得造影图象的信噪比获得提高，在实现中考虑到数字剪影图象是与时间有关的序列，因此采用利于优化的多权重积分累加，提高了运算效率。