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[The usefulness of the method of planar diffusion echo imaging (EPI DWI) in the diagnosis of cerebral ischemia].

The preliminary results of MR echoplanar diffusion-weighted imaging (EPI DWI) in patients with stroke are presented. Twelve patients (5 females, 7 males) aged 36-78 years (mean 63.8) were examined by 2T system. No focal lesions were found in the acute phase of stroke on T1-weighted images. Narrowing of sulci in the region of stroke was the only abnormal finding. Focal hyperintense lesions were shown on PD and T2-weighted images in 50% of patients in the acute phase, 7 hours after the onset of clinical symptoms. On EPI diffusion-weighted images focal decrease of apparent diffusion coefficient (ADC) was observed in all cases of the acute phase of stroke after 3 hours. EPI DWI allows for earliest detection of ischaemic lesions in brain tissue. The method is especially useful in characterisation of the acute phase of stroke and shows its evolution thanks to the use of ADC.