Susceptibility weighted imaging: Clinical applications and future directions

Figure 14 A 50-year-old man patient with acute left middle cerebral artery infarct. A: DWI, showing a left periventricular hyperintense lesion; B: SWI magnitude image detects left MCA susceptibility vessel sign; C: SWI minIP image reveals prominent hypointense veins in the infarct region; D: Three days later, new SWI minIP image shows hemorrhage in the infarct area indicating development of hemorrhagic transformation. There continues to be perminent venous visualization in the left temporal lobe; E: SWI phase image confirms the hemorrhage leading to a positive shift effect. SWI: Susceptibility weighted imaging; PCA: Posterior cerebral artery; DWI: Diffusion weighted image; minIP: Minimum intensity projection algorithm; MCA: Middle cerebral artery.