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signalintensity area (arrow) and a lowsignalintensity area (arrowhead) suggestive of recent bleeding in the left centrum ovale. (b) Transverse intermediateweighted SE MR image confirms the presence of a large hemorrhagic lesion (arrow) in the left centrum ovale. The lesion is surrounded by edema (arrowhead). The diagnosis of acute hemorrhage related to a type 1 cavernous angioma was confirmed at surgery and pathologic analysis.,第九頁,共十八頁。,Figure 2. Type 2 cavernous angioma in an asymptomatic 24yearold man. (a) Transverse T1weighted SE MR image shows a cavernous angioma in the right cingulate gyrus. The lesion includes a central reticulated core (arrow) and a peripheral lowsignalintensity rim (arrowhead). (b) Transverse T2weighted fast SE MR image helps confirm the presence of a