Abstract #1415

Composite Histogram Constrained Artifact Suppression (CHiCA) for Dynamic Cardiac 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; ³Division of Medical Physics in Radiology, 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 using a composite image histogram as constraint (CHiCA) in a non-linear reconstruction framework for the suppression of aliasing artifacts in sub-Nyquist-sampled MRI. The performance of CHiCA is successfully presented on a numerical simulation of a DCE MRI measurement and a simulated radial in vivo dynamic cardiac MR. Data acquisition was implemented as interleaved radial sampling with sliding window reconstruction to generate the composite image. The reconstruction of undersampled data by constraining the images histogram offers the possibility to significantly reduce measurement time, while effectively suppressing aliasing artifacts.