Fig. 2
From: SWI as a promising tool comparable to CT perfusion in evaluation of acute cerebral infarction
62-year-old male presented to stroke unit with left-sided weakness of 6-h duration. a DWI reveals true diffusion restriction seen involving the M4 & M5 segments along the territory of MCA with low ADC representing ASPECT score 8. b CTP revealed significant delay in mean transient time along the left fronto tempro parietal region (white arrows) along M1 to M6 with involvement of deep nuclei as well as internal capsule compared to right cerebral hemisphere with ASPECT score 3. c SWI of the same patient reveals asymmetrical vessel sign with prominent dark dilated veins on the left cerebral hemisphere along M1, 2, 4, 5 & M6 segments; however, the deep nuclei are not affected representing ASPECT score 5. The blooming along the affected vessels denotes hemorrhagic transformation (white arrows).The ASPECT score of SWI and perfusion images are lower than that of DWI representing ASPECT score (5, 3 & 8, respectively). DW/P mismatch noted denoting an area of risk to infarction (penumbra). DW/SWI mismatch is also noted similar to perfusion mismatch