1Radiology, University Medical Center Utrecht, Utrecht, Netherlands; 2Neonatology, Wilhelmina Children's Hospital, Utrecht, Netherlands
Neonatal MR imaging has distinct properties compared to adult MR imaging. Assumptions, used to quantify perfusion in an Arterial Spin Labeling MR experiment, may not hold true. In this study the longitudinal relaxation rate of blood was measured in a large cohort of neonates. In addition, the influence on perfusion quantification was evaluated and the relation with hematocrit was investigated.