P-003 Intraarterial MR perfusion imaging of meningiomas: comparison to digital subtraction angiography

摘要: Purpose Meningiomas often benefit from preoperative embolization in order to reduce operative blood loss and associated morbidity. Intraarterial (IA) administration of contrast directly into the external carotid artery (ECA) internal (ICA) branches supplying tumor during procedure maps out vessels as well evaluating which portions are successfully devascularized prior surgery. Whereas IA digital subtraction x-ray angiography (DSA) is gold standard for guidance, perfusion MRI may offer increased sensitivity residual areas vascularized tumor. Materials Methods Studies were performed a combined “XMR” suite wherein an unit (Integris V5000, Philips Medical Systems) coupled in-line 1.5 T MR scanner (Intera, Systems), allowing easy patient movement between two imaging modalities endovascular procedures. We evaluated 14 patients with selective T2* dynamic susceptibility (DSC) embolization. Eight these also intraprocedural T1 weighted MR. was dilute Gd injected initially subsequently common carotid. The selected confirmed be providing vascular supply by angiographic evaluation. portion demonstrated or supply, based on measures, correlated DSA obtained each procedure. assessments additionally compared conventional IV studies. Results Both techniques more sensitive than at detecting following technique subject less artifact, thus better skull base near aerated paranasal sinuses. tighter arterial input functions due cervicocerebral arteries. Similarly, time enhancement curves methods reduced mean transit lack recirculation peak comparted method. good differentiating ECA ICA individual tumors. However, variants such anterior falx ethmoidal arising ophthalmic (ICA outside brain barrier) presented interpretive challenges but readily apparent DSA. Conclusion appear useful adjunct determining vascularity source that guided