Meeting Banner
Abstract #0299

Cardiac Triggering & Label-Control Transition Profiles in Hadamard Encoded Pseudo-Continuous Arterial Spin Labeling

Wouter Teeuwisse1, Michael Helle2, Susanne Rfer2, Matthias J. P. van Osch1

1Radiology, C. J. Gorter Center for High Field MRI, Leiden University Medical Center, Leiden, Netherlands; 2Institute for Neuroradiology, Christian-Albrechts-Universitt, UK-SH, Kiel, Germany

Hadamard encoded continuous ASL is a promising technique to obtain dynamic ASL angiography images and temporal information such as transport delay time in a short scan time. However blurring of the encoding pattern by the cardiac cycle and non instantaneous switching between label and control can hamper the efficacy. By means of simulations and in vivo experiments, the necessity of cardiac triggering is shown and a minimum switching time of 50 ms for pCASL is demonstrated.