Renal perfusion is an important physiological parameter in health and disease (1). To measure kidney perfusion using arterial spin labelling (ASL) the respiratory motion is a major problem. In this study, respiratory motion information is acquired from a projection signal and used to adjust the position of the excited slice in real time. The feasibility of free-breathing multi-slice kidney perfusion imaging using EPI based pseudocontinuous ASL (pCASL) with navigator-based slice tracking method is investigated.
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