The Acquisition and Processing of X\|Ray Digital Subtraction Angiography (DSA)Image Based on Logarithm Non\|linear Mapping
基于对数非线性映射的X光数字减影图象的获取与处理

The effect of DSA(Digital Subtraction Angiography) images acquired with general subtraction algorithm is not satisfied, the merit of DSA images cannot be expressed and used extensively. According to the principle of formation of X\|ray image, this paper described an improved subtraction algorithm called the logarithm non linear grey mapping. In comparison with general subtraction algorithm, this improved subtraction algorithm finally acquired a satisfactory sequence of DSA vascular images with high contrast and high definition.