Magdalena Sokolska1,
Xavier Golay2, David Thomas1
1Department
of Brain Repair & Rehabilitation, UCL Institute of Neurology, London, UK,
United Kingdom; 2Department of Brain Repair & Rehabilitation,
University College London, London, UK, United Kingdom
Arterial Spin Labelling (ASL) is a non-invasive method allowing quantitative measurement of CBF. Pseudo-continuous ASL (pCASL) is considered one of the best ASL techniques due to its high SNR. However, the accurate and reproducible CBF quantification using this technique can be challenging , because the labelling efficiency of the protons (α), which measures the effectiveness of the magnetic labelling of spins, depends on a number of subject-specific factors. The aim of this study was to compare different methods of labelling efficiency estimation of pCASL and evaluate error distribution on perfusion quantification resulting from α.