Probabilistic Identification and Estimation of Noise: Application to MR Images
C. Anjanappa1 and H. S. Sheshadri2

1Department of Electronics and Communication Engineering, The National Institute of Engineering, Mysore, Karnataka, India.

2Department of Electronics and Communication Engineering, PES College of Engineering, Mandya, Karnataka, India.

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Abstract: For proper modelling of signal and noise in MR data requires proper interpretation and analysis of data, the different approaches with this degradation due to random fluctuations in the MR data, probabilistic modeling is power solution, which needs correctness in the computation of noise is challenging task and various stastical approaches can be utilized. After modelling the noise it can be integrated to denoising pipeline, in this research work, the recognition of noise only pixels and the evaluation of standard deviation of noise using median, mean or other optimal sample quantiles are combined in to single frame work for noise assement and uses fixed point iterative procedure to obtain standard deviation of noise. We tested the effectiveness of the algorithm to the MR clinical and synthetic data base.

Keywords: Gamma Distribution; Noise Estimation; Parallel Reconstruction Algorithm; Rayleigh Distribution

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