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Abstract #0602

Reference Histogram Constrained Artifact Suppression (RHiCA) for Incoherently Undersampled Magnetic Resonance Imaging

Thomas Gaass1, Guillaume Potdevin2, Grzegorz Bauman3, 4, Peter Nol5, Axel Haase1

1Zentralinstitut fr Medizintechnik, Technische Universitt Mnchen, Garching, Germany; 2Department of Physics, Technische Universitt Mnchen, Garching, Germany; 3Department of Medical Physics, German Cancer Research Center, Heidelberg, Germany; 4Department of Medical Physics, University of Wisconsin, Madison, WI, United States; 5Department of Diagnostic and Interventional Radiology, Technische Universitt Mnchen, Munich, Germany

We introduce a novel reconstruction technique (RHiCA), based on the specific signature of incoherent undersampling artifacts in histogram space and relying on a minimization algorithm. Utilizing the histogram of a low resolution reference image we propose to correct the impaired image via its altered histogram. The performance of the Reference Histogram Constrained Artifact (RHiCA) reduction is successfully presented on a numerical phantom and a 3T head MRI. We successfully illustrate, that applying RHiCA leads to an effective suppression of undersampling artifacts in radial MRI acquisitions up to undersampling factors of 6.