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Abstract #2838

Real-Time Elimination of Undersampling Artifacts Using 3D Total Variation on Graphics Hardware

Florian Knoll1, Markus Unger2, Franz Ebner3, Rudolf Stollberger1

1Institute of Medical Engineering, TU Graz, Graz, Austria; 2Institute for Computer Graphics and Vision, TU Graz, Graz, Austria; 3Department of Radiology, Medical University Graz, Graz, Austria

Undersampled radial acquisition strategies have great potential to acquire CE MRA data sets with high spatial and temporal resolution. It has been shown recently that image reconstruction with a total variation constraint efficiently eliminates undersampling artifacts. We show that 3D TV optimization problems can be solved on modern graphic processing units (GPUs), with computation times that allow real-time image reconstruction. Our results show excellent removal of streaking artifacts for highly undersampled CE MRA data sets. With the GPU implementation we achieve a reconstruction time of 0.24s for the whole 3D data set.