小波变换在冠状动脉造影图像处理中的应用

Image processing of coronary arteriongraphy by WT

运用小波变换(WT)对选择性冠状动脉造影图像进行了对比度增强和降噪处理。结果表明,经小波多尺度增强处理后图像中血管与背景的差别对比度得到显著提高,亮度不均匀性有明显改善;成像过程中引入的噪声经可变阈值小波变换处理有显著降低,提高了造影血管影像的清晰度。研究结果提示:可考虑运用小波分析作为选择性冠状动脉造影图像的主要处理工具。

Wavelet transform （WT） technique was applied to image processing of selective coronary arteriography for contrast enhancement and de-noising. Preliminary analysis results show that the implementation of WT greatly improved the discrimination of object and background in the images. By using WT with a changeable threshold, most of the noise introduced in the imaging procedure was decreased, and the definition of images was improved markedly.It is considerable to use WT technique as the main tool for the image processing of selective coronary arteriography.