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The role of time-resolved 3D contrast-enhanced MR angiography in the assessment and grading of cerebral arteriovenous malformations |
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| Authors: | L. Oleaga S.S. Dalal R.W. Hurst A. Voorhees |
| Affiliation: | a Radiology Department, Hospital of the University of Pennsylvania, 3400 Spruce Street, Philadelphia, PA 19104, USA b Radiology Department, Hospital Clinic, Villarroel 170, Barcelona 08036, Spain c Neurosurgery Department, Hospital of the University of Pennsylvania, 3400 Spruce Street, Philadelphia, PA 19104, USA d Siemens Medical Solutions USA, Inc., Malvern, PA, USA |
| Abstract: | PurposeTo assess the role of three-dimensional (3D) contrast-enhanced, time-resolved MR angiography (CE TR MRA) in patients with intracranial arteriovenous malformations (AVMs).MethodsWe studied 12 patient with intracranial AVMs on a 3.0 T MR imaging system (Magentom TIM Trio, Siemens Medical Solutions, Erlangen, Germany) using 3D CE TR MRA with autocalibrating partially parallel acquisitions and echo sharing schemes, which provided temporal resolution of 0.58 or 1.7 s and near isotropic voxels. We qualitatively assessed image quality of the 3D CE TR MRA and compared the grading of the AVMs based on modified Spetzler-Martin system for 3D CE TR MRA and catheter digital subtraction angiography (DSA).ResultsCE TR MRA provided good quality images in the 3 standard orthogonal planes, and good arterial-venous separation in all cases. All AVMs were correctly graded by CE TR MRA when compared with DSA.3D CE TR MRA provides a non-invasive alternative to DSA for the evaluation of cerebral AVMs. |
| Keywords: | Arteriovenous malformation Magnetic resonance angiography Gadolinium enhanced magnetic resonance angiography |
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