RT Journal Article SR Electronic T1 Assessment of Vascular Supply of Hypervascular Extra-Axial Brain Tumors with 3T MR Regional Perfusion Imaging JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 554 OP 558 DO 10.3174/ajnr.A1847 VO 31 IS 3 A1 A. Sasao A1 T. Hirai A1 S. Nishimura A1 H. Fukuoka A1 R. Murakami A1 M. Kitajima A1 T. Okuda A1 M. Akter A1 M. Morioka A1 S. Yano A1 H. Nakamura A1 K. Makino A1 J.-i. Kuratsu A1 K. Awai A1 Y. Yamashita YR 2010 UL http://www.ajnr.org/content/31/3/554.abstract AB BACKGROUND AND PURPOSE: The vascular supply of extra-axial brain tumors provided by the external carotid artery has not been studied with RPI. The purpose of this work was to determine whether RPI assessment is feasible and provides information on the vascular supply of hypervascular extra-axial brain tumors. MATERIALS AND METHODS: Conventional ASL and RPI studies were performed at 3T in 8 consecutive patients with meningioma. On the basis of MRA results, we performed RPI by placing a selective labeling slab over the external carotid artery. Five patients underwent DSA before surgery. Two neuroradiologists independently evaluated the overall image quality, the degree of tumor perfusion, and the extent of the tumor vascular territory on conventional ASL and RPI. RESULTS: In overall quality of conventional ASL and RPI, no images interfered with interpretation. In comparisons of the vascular tumor territory identified by the conventional ASL and RPI techniques, the territories coincided in 3 cases, were partially different in 4, and completely different in 1. The interobserver agreement was very good (κ = 0.82). In 5 patients who underwent DSA, the 4 patients in whom the dominant supply was the external carotid artery were scored as coincided or partially different. The 1 patient in whom the vascular supply was from the internal carotid artery was scored as completely different. CONCLUSIONS: RPI with selective labeling of the external carotid artery is feasible and may provide information about the vascular supply of hypervascular extra-axial brain tumors. ACAanterior cerebral arteryAPAascending pharyngeal arteryASLarterial spin-labelingCDcompletely differentDSAdigital subtraction angiographyFLAIRfluid-attenuated inversion recoveryICAinternal carotid arteryLtleftMMAmiddle meningeal arteryMRAMR angiographyNSAnumber of signal-intensity acquisitionsPCAposterior cerebral arteryPDpartially differentPULSARpulsed star labeling of arterial regionsQ2TIPSsecond version of quantitative imaging of perfusion using a single subtraction with thin-section TI1 periodic saturationQUASARquantitative STAR labeling of arterial regionsRPIregional perfusion imagingRtrightTFEturbo field echo