Volume-rendered 3D display of MR angiograms in the diagnosis of cerebral arteriovenous malformations.

PURPOSE To determine whether application of a volume-rendered display of 3D time-of-flight (TOF) MR angiography could assist the diagnosis of cerebral arteriovenous malformations (AVMs). MATERIAL AND METHODS Volume-rendered 3D images of postcontrast 3D time-of-flight MR angiography were compared with conventional angiograms in 12 patients. The correlation between the 3D images and the operative findings was also analyzed in 5 patients. RESULTS The 3D-displayed images showed all of the feeders and drainers in 10 and 9 patients, respectively. In all patients, the nidus was three-dimensionally visualized. In 3 patients with hematomas, the relationship between the hematoma and the AVM was well demonstrated. The 3D images corresponded well with the operative findings in the 5 patients. CONCLUSION This method is of help in assessing the relationship between the components of an AVM as well as that between an AVM and an associated hematoma.

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