الفهرس 
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Abstract
The advent of new magnetic resonance imaging (MRI) techniques has improved acute stroke diagnosis. Susceptibility weighted imaging (SWI) has an important role in the management of cerebro-vascular strokes.
Patients and Methods: The study was conducted upon 50 patients clinically diagnosed with cerebro-vascular strokes and referred to department of radio-diagnosis, Faculty of Medicine, Minia University. Computed tomography (CT) was done at first then magnetic resonance imaging was performed on a 1.5T Philips MR system using conventional MRI sequences as fluid attenuated inversion recovery (FLAIR), T2-weighted, T1-weighted and advanced sequences as susceptibility-weighted imaging (SWI) with the parameters including slice thickness, voxel size, field of view (FOV) and matrix,. They were done after the approval of ethical committee of our institution. Informed written consents were taken from the patients or their relatives.
Results: In our study, we classified our patients in two groups; group A (25 patients) we compared SWI with CT perfusion in assessment area at risk and found 16 out of 19 patients with PWI had APVS representing 84 %, and only 3 has negative APVS. On the other hand no one with negative PWI had APVS, this prove that there is good correlation between the PWI and APVS with significant p value. In group B (25 patients) we compared SWI with follow up FLAIR in assessment of infarction growth; 17 patients showed DWI /SWI mismatch and developed infarction growth representing about 68 %. The remaining 8 patients who had no DWI/ SWI mismatch no one of them developed infarction growth.
Conclusion: from this study we concluded that new imaging SWI MRI modality is a valuable MRI sequence in imaging ischemic stroke.