[The value of arterial spin-labeled perfusion magnetic resonance imaging (ASL) in cerebral ischemia].

The aim of this work was to evaluate the usefulness of arterial spinlabeled perfusion imaging (ASL MRI) in patients with cerebral ischemia. The 17 patients with clinical suspicions of brain stroke were examined in ASL protocol - 3 in acute, 11 in subacute and 3 in chronic phase of cerebral ischemia. The relative cerebral blood flow (CBF) was measured and compared with results of perfusion weighted imaging (PWI) and informations from available literature. The suspected medium decrease of CBF was observed in all stages. In 76% of cases the coherence of ASL and PWI methods was demonstrated. The ASL imaging can be useful diagnostic technique in patients with cerebral ischemia, mainly when contrast agents are contraindicated.