Preprocessing for MRI
Zhu Juhua · Jisuanji gongcheng · 2001
It is necessary for MRI(Magnetic Resonance Image) to be preprocessed before being used for analysis due to the limitation of imaging methodology, since the abnormal symptoms submerged in noise may lead to missed diagnosis or even misdiagnosis. However, smoothing often brings about blurred image. Although therere several kinds of edge preserving smoothing algorithms, the results are not satisfying. In this paper, we employ an improved minutia preserving smoothing algorithm based on solving a nonlinear diffusion equation. This method, to some extent, is effective for both smoothing and minutia preserving, mainly because it prevents the blurring effect of degenerate diffusion equation for these points with big gray level variations. Compared with other methods, this algorithm has better performance for preprocessing of noisy MRI images.