“…The lengthening of T 1 reduces the efficiency of fast imaging, however a longer T1 is of proven benefit in applications such as time of flight angiography (Heverhagen et al, 2008;von Morze et al, 2007) and arterial spin labelling, ASL (Gardener et al, 2009;Pfeuffer et al, 2002). Despite this supposed advantage, the implementation of the preferred pseudo continuous arterial spin-labelling has proven difficult at 7T (Teeuwisse et al, 2010), but see also (Gardumi et al, 2017). Hitherto, researchers have tended to prefer flow-alternating inversion recovery (FAIR) based techniques (Gardener et al, 2009;Ivanov et al, 2016).…”