Abstract #1193

Image Based Correction of Phasewraps in 4D PC-MRI Data using Fast Reference Scans

Daniel Stucht¹, Michael Markl², Rocco Gasteiger³, Oliver Speck¹

¹Biomedical Magnetic Resonance, Otto-von-Guericke University, Magdeburg, Germany; ²Dept. of Diagnostic Radiology, Medical Physics, University Hospital, Freiburg, Germany; ³Institute of Simulation & Graphics, Otto-von-Guericke University, Magdeburg, Germany

4D PC-MRI is used to measure four dimensional blood flow and characterize vascular hemodynamics. If the actual flow velocities exceed the venc parameter which specifies the velocity sensitivity, velocity phase wraps will occur. A simple method to correct these phasewraps is to aquire the data twice. Once with the lower venc, then with a higher venc to correct the phase wraps in the first dataset. The aim of this study is, to systematically analyze in phantom scans to what extent a reduction of the additional scan time for the reference scan can be achieved by reducing its spatial and temporal resolution.