Evaluation of Intracranial Arteriovenous Malformations With Four-Dimensional Arterial-Spin Labeling–Based 3-T Magnetic Resonance Angiography. Issue 2 (March 2016)

• Record Type: Journal Article
• Authors: Iryo, Yasuhiko; Hirai, Toshinori; Nakamura, Masanobu; Kawano, Takayuki; Kaku, Yasuyuki; Ohmori, Yuki; Kai, Yutaka; Azuma, Minako; Nishimura, Shinichiro; Shigematsu, Yoshinori; Kitajima, Mika; Yamashita, Yasuyuki
• Is Part Of: Journal of computer assisted tomography. Volume 40:Issue 2(2016)
• Publication Date: 2016-03
• Subjects: arterial spin labeling -- magnetic resonance angiography -- cerebral arteriovenous malformation -- four dimensional; Tomography -- Periodicals; Tomography -- Periodicals; Tomography; Periodicals; 616.0757
• DOI: 10.1097/RCT.0000000000000346
• Languages: English
• ISSNs: 0363-8715

Abstract

Abstract : Objective: We aimed to assess the usefulness of 3-T 4-dimensional (4D) arterial spin-labeling (ASL)–based magnetic resonance angiography (MRA) with color-coded time-of-arrival (TOA) maps for the evaluation of cerebral arteriovenous malformations (AVMs). Methods: Our study included 6 patients with cerebral AVMs. They underwent 4D-ASL MRA at 3T and digital subtraction angiography. A pseudocontinuous arterial spin labeling protocol with look-locker sampling was used for spin labeling. Two independent readers reviewed the 4D-ASL MRA images with color-coded TOA maps for the nidus size, arterial feeders, and venous drainage. Two other readers consensually reviewed the digital subtraction angiography images. Results: The cerebral AVMs were demonstrated on all 4D-ASL MRA images. In 5 high-flow AVMs, the color-coded TOA maps were especially useful for identifying the feeder/drainer. Intermodality agreement was excellent for the nidus size (κ = 1.0), very good for arterial feeders (κ = 0.88), and good for venous drainage (κ = 0.80). Conclusions: The 4D-ASL 3-T MRA with color-coded TOA maps is useful for assessing the gross angiographic characteristics of intracranial AVMs.