Susceptibility Weighted MR Imaging at 3T in Patients with Occlusion of Middle Cerebral Artery : Comparison with Diffusion Weighted Imaging Score (ASPECTS)
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Purpose: To describe the imaging findings at susceptibility weighted imaging (SWI) in patients with occlusion of middle cerebral artery, and to correlate theabsence or presence of arterial bright foci in sylvian fissure, as one of their finding at SWI, with the diffusion weighted imaging (DWI)scores. Materials and methods: We included 12 patientswith symptomatic unilateral occlusion of middle cerebral artery. Retrospective review of SWI and DWI was done. On DWI, size of infarction was analyzed according to the ASPECTS grading system. On SWI, presence of hemorrhage, dark blooming of intravascular clot, distension of medullary or cortical vein, and absence or presenceof bright arterial foci in sylvian fissure were evaluated. Results: Of 12 patients with symptomatic unilateral MCA occlusion, SWI showed dark blooming of intravascular clot in 8 patients (66.7%), distended medullary or cortical vein in 7 patients (58.3%), nonvisualization of arterial bright signal intensity in sylvianfissure in 7 patients (58.3%), and hemorrhage in one patient (8.3%). In comparison with DWI, patients with spared sylvian arterial bright signal intensity showed better ASPECTS score (6.4±4.1) than patients without spared arterial bright signal intensity (4.4±1.1), yet it was not statistically significant(p=0.267, t-test). Conclusion: SWI at 3T provides added diagnostic information including site of occlusion, collateral flow by arterial bright signal intensity in sylvian fissure and early hemorrhagic transformation in patients with symptomatic MCA occlusion
Abstract
Purpose: To describe the imaging findings at susceptibility weighted imaging (SWI) in patients with occlusion of middle cerebral artery, and to correlate theabsence or presence of arterial bright foci in sylvian fissure, as one of their finding at SWI, with the diffusion weighted imaging (DWI)scores. Materials and methods: We included 12 patientswith symptomatic unilateral occlusion of middle cerebral artery. Retrospective review of SWI and DWI was done. On DWI, size of infarction was analyzed according to the ASPECTS grading system. On SWI, presence of hemorrhage, dark blooming of intravascular clot, distension of medullary or cortical vein, and absence or presenceof bright arterial foci in sylvian fissure were evaluated. Results: Of 12 patients with symptomatic unilateral MCA occlusion, SWI showed dark blooming of intravascular clot in 8 patients (66.7%), distended medullary or cortical vein in 7 patients (58.3%), nonvisualization of arterial bright signal intensity in sylvianfissure in 7 patients (58.3%), and hemorrhage in one patient (8.3%). In comparison with DWI, patients with spared sylvian arterial bright signal intensity showed better ASPECTS score (6.4±4.1) than patients without spared arterial bright signal intensity (4.4±1.1), yet it was not statistically significant(p=0.267, t-test). Conclusion: SWI at 3T provides added diagnostic information including site of occlusion, collateral flow by arterial bright signal intensity in sylvian fissure and early hemorrhagic transformation in patients with symptomatic MCA occlusion
참고문헌 (17)
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