Contrast optimization in arterial spin labeling with multiple post-labeling delays for cerebrovascular assessment - Paschoal, André Monteiro; Leoni, Renata Ferranti; Foerster, Bernd Uwe; Santos, Antônio Carlos dos; Pontes Neto, Octávio Marques; Paiva, Fernando Fernandes (Magnetic Resonance Materials in Physics, Biology and Medicine, 2021)