Enhancement of IVR images by combining an ICA shrinkage filter with a multi-scale filter
Yen‐Wei Chen, Kiyotaka Matsuo, Xian‐Hua Han, Atsumoto Shimizu, Koichi Shibata, Yukio Mishina, Yoshihiro Mukuta · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2007
Interventional Radiology (IVR) is an important technique to visualize and diagnosis the vascular disease. In real medical application, a weak x-ray radiation source is used for imaging in order to reduce the radiation dose, resulting in a low contrast noisy image. It is important to develop a method to smooth out the noise while enhance the vascular structure. In this paper, we propose to combine an ICA Shrinkage filter with a multiscale filter for enhancement of IVR images. The ICA shrinkage filter is used for noise reduction and the multiscale filter is used for enhancement of vascular structure. Experimental results show that the quality of the image can be dramatically improved without any blurring in edge by the proposed method. Simultaneous noise reduction and vessel enhancement have been achieved.