NDLI: Modified Anisotropic Diffusion filtering algorithm for MRI

Content Provider	IEEE Xplore Digital Library
Author	Srivastava, A. Bhateja, V. Tiwari, H.
Copyright Year	2015
Description	Author affiliation: Dept. of Electron. & Commun. Eng., SRMGPC, Lucknow, India (Srivastava, A.; Bhateja, V.; Tiwari, H.)
Abstract	During the acquisition process of Magnetic Resonance Imaging (MRI), irregular bias is imposed in the intensity values of the pixels. These biases follow the Gaussian Noise distribution model and act as a constraint to the effective medical diagnosis. The conventional Anisotropic Diffusion (AD) approach is limited to preserve the structural integrity of MRI at only low noise levels. This paper proposes a modified AD algorithm aimed to improve the estimation of the diffusion constant to facilitate better edge detection and preservation of details. The proposed algorithm operates on the decomposed mask images of MRI by incorporating the domain filtering principle of the Bilateral filter(prior to the estimation of diffusion constant). Simulation trials have been conducted at different Gaussian noise variances and performance has been evaluated on the basis of Peak Signal-Noise Ratio (PSNR) and Structural Similarity (SSIM). The proposed algorithm has shown stable value of evaluation parameters at higher noise variances. Also, the preservation of details has improved as compared to the conventional AD approach.
Starting Page	1885
Ending Page	1890
File Size	4001375
Page Count	6
File Format	PDF
ISBN	9789380544151
e-ISBN	9789380544168
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-03-11
Publisher Place	India
Access Restriction	Subscribed
Rights Holder	Bharati Vidyapeeth University, New Delhi
Subject Keyword	Anisotropic magnetoresistance SSIM Filtering AD Magnetic resonance imaging Gaussian noise Image edge detection Filtering algorithms Bilateral Filter Gaussian Noise
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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