Improved pixel‐by‐pixel MRI R2* relaxometry by nonlocal means

To investigate the feasibility of improving MRI R2* mapping by filtering the images before curve‐fitting.

[1]  Dudley J Pennell,et al.  Myocardial T  *2 measurement in iron‐overloaded thalassemia: An ex vivo study to investigate optimal methods of quantification , 2008, Magnetic resonance in medicine.

[2]  Robin M Heidemann,et al.  Generalized autocalibrating partially parallel acquisitions (GRAPPA) , 2002, Magnetic resonance in medicine.

[3]  Enmin Song,et al.  Denoising 3D MR images by the enhanced non-local means filter for Rician noise. , 2010, Magnetic resonance imaging.

[4]  L. Rudin,et al.  Nonlinear total variation based noise removal algorithms , 1992 .

[5]  P. Boesiger,et al.  SENSE: Sensitivity encoding for fast MRI , 1999, Magnetic resonance in medicine.

[6]  L. Ying,et al.  Sensitivity encoding reconstruction with nonlocal total variation regularization , 2011, Magnetic resonance in medicine.

[7]  Benoît Naegel,et al.  SNR enhancement of highly-accelerated real-time cardiac MRI acquisitions based on non-local means algorithm , 2009, Medical Image Anal..

[8]  Olaf Dietrich,et al.  T2 measurement in articular cartilage: Impact of the fitting method on accuracy and precision at low SNR , 2009, Magnetic resonance in medicine.

[9]  Nadim Joni Shah,et al.  Spatially variable Rician noise in magnetic resonance imaging , 2012, Medical Image Anal..

[10]  T. S. St. Pierre,et al.  Noninvasive measurement and imaging of liver iron concentrations using proton magnetic resonance. , 2005, Blood.

[11]  Guido Gerig,et al.  Nonlinear anisotropic filtering of MRI data , 1992, IEEE Trans. Medical Imaging.

[12]  T. Pock,et al.  Second order total generalized variation (TGV) for MRI , 2011, Magnetic resonance in medicine.

[13]  Mark Fogel,et al.  International reproducibility of single breathhold T2* MR for cardiac and liver iron assessment among five thalassemia centers , 2010, Journal of magnetic resonance imaging : JMRI.

[14]  Pierrick Coupé,et al.  An Optimized Blockwise Nonlocal Means Denoising Filter for 3-D Magnetic Resonance Images , 2008, IEEE Transactions on Medical Imaging.

[15]  Jean-Michel Morel,et al.  A Review of Image Denoising Algorithms, with a New One , 2005, Multiscale Model. Simul..

[16]  Kevin M. Johnson,et al.  Wavelet packet denoising of magnetic resonance images: Importance of Rician noise at low SNR , 1999, Magnetic resonance in medicine.

[17]  D. Marquardt An Algorithm for Least-Squares Estimation of Nonlinear Parameters , 1963 .

[18]  B. F. Logan,et al.  The Fourier reconstruction of a head section , 1974 .

[19]  Dudley J Pennell,et al.  On T2* Magnetic Resonance and Cardiac Iron , 2011, Circulation.

[20]  D. Pennell,et al.  Myocardial T  2* measurements in iron‐overloaded thalassemia: An in vivo study to investigate optimal methods of quantification , 2008, Magnetic resonance in medicine.

[21]  D. Pennell,et al.  Improved MRI R2* relaxometry of iron‐loaded liver with noise correction , 2013, Magnetic resonance in medicine.

[22]  Paul S Babyn,et al.  Accurate liver T  *2 measurement of iron overload: A simulations investigation and in vivo study , 2009, Journal of magnetic resonance imaging : JMRI.

[23]  Kenneth Levenberg A METHOD FOR THE SOLUTION OF CERTAIN NON – LINEAR PROBLEMS IN LEAST SQUARES , 1944 .

[24]  José V. Manjón,et al.  MRI denoising using Non-Local Means , 2008, Medical Image Anal..

[25]  Orpheus Kolokythas,et al.  A simulation-based comparison of two methods for determining relaxation rates from relaxometry images. , 2011, Magnetic resonance imaging.

[26]  Aaron J. Miller,et al.  The use of power images to perform quantitative analysis on low SNR MR images. , 1993, Magnetic resonance imaging.

[27]  Pierrick Coupé,et al.  Author manuscript, published in "Journal of Magnetic Resonance Imaging 2010;31(1):192-203" DOI: 10.1002/jmri.22003 Adaptive Non-Local Means Denoising of MR Images with Spatially Varying Noise Levels , 2010 .

[28]  Stuart Crozier,et al.  Denoising of Dynamic Contrast-Enhanced MR Images Using Dynamic Nonlocal Means , 2010, IEEE Transactions on Medical Imaging.

[29]  Cheng Guan Koay,et al.  Analytically exact correction scheme for signal extraction from noisy magnitude MR signals. , 2006, Journal of magnetic resonance.

[30]  T. Coates,et al.  Improved R2* measurements in myocardial iron overload , 2006, Journal of magnetic resonance imaging : JMRI.