Assessment of arteriovenous malformations with 3-Tesla time-resolved, contrast-enhanced, three-dimensional magnetic resonance angiography: Clinical article

Kanako Kunishima, Harushi Mori, Daisuke Itoh, Shigeki Aoki, Hiroyuki Kabasawa, Tomoyuki Koga, Keisuke Maruyama, Tomohi K.O. Masumoto, Osamu Abe, Kuni Ohtomo

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Object. Although conventional catheter angiography is commonly used in the evaluation of intracranial arteriovenous malformations (AVMs), less invasive tools are more suitable for screening or follow-up. Older MR angiography techniques cannot provide high enough temporal and spatial resolution for assessing AVMs. Threetesla time-resolved imaging of contrast kinetics (TRICKS) - a time-resolved, contrast-enhanced 3D MR angiography technique - achieves subsecond time resolution without sacrificing spatial resolution. The purpose of this study was to assess the accuracy of TRICKS at 3 T in the evaluation of AVMs. Methods. Between November 2006 and November 2007, 31 patients who were known to have AVMs underwent evaluation in a 3-T unit with the TRICKS technique. The TRICKS images were then evaluated independently by 2 radiologists for nidus detection, early venous filling detection, and Spetzler-Martin classification, and these results were compared with the results of catheter angiography. Results. Time-resolved imaging of contrast kinetics achieved 96% sensitivity and 100% specificity both in nidus detection and early venous filling detection. The Spetzler-Martin grades also showed excellent correlation with catheter angiography findings (κ = 0.89). Conclusions. Although this is a preliminary study, the authors' results indicate that time-resolved contrast-enhanced 3D MR angiography at 3 T is a good tool to assess AVMs, and has the potential to replace catheter angiography in screening or follow-up examinations of patients with AVMs.

Original languageEnglish (US)
Pages (from-to)492-499
Number of pages8
JournalJournal of neurosurgery
Volume110
Issue number3
DOIs
StatePublished - Mar 2009
Externally publishedYes

Keywords

  • Arteriovenous malformation
  • Contrast-enhanced angiography
  • Digital subtraction angiography
  • Time-resolved angiography

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