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

Abstract

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.

The Predictive Value of 3D Time-of-Flight MR Angiography in Assessment of Brain Arteriovenous Malformation Obliteration after Radiosurgery

“…Recently, more sophisticated MR imaging techniques were developed that have demonstrated improved depiction of bAVMs in small series, but cutoff points for diagnosing obliteration were not given. 18,21,[31][32][33]46 In a study of nidus delineation on MRA in comparison with DSA, bAVMs delineated on MRA were found to be larger and more randomly displaced. 39 We studied bAVMs after radio- , A and B).…”

“…To simulate the actual clinical situation, we did not blind our observers to the patient's clinical situation, in contrast to some comparable studies. 19,[31][32][33][34] All DSA 2 images were re-evaluated for the presence of obliteration in a consensus meeting to create a uniform reference standard (DSA 2c ). Clinical and treatment parameters noted included sex, clinical presentation, age at time of radiosurgery, marginal dose, volume and location of the bAVM, previous partial or unsuccessful treatment, and length of follow-up.…”

Time-Resolved Contrast-Enhanced MR Angiography of Spinal Vascular Malformations

“…The increased temporal resolution achieved is of particular value in the evaluation of arteriovenous shunts, and preliminary results have also been described in studies of intracranial AVMs and dural fistulas. 10,11,14 Other advantages include a shorter acquisition time and lack of requirement for contrast bolus timing. 15 Standard TOF MRA techniques lack sufficient temporal resolution to identify SVMs, and phase-contrast methods are not suited to the detection of these often relatively low-flow shunts.…”

Detection of residual brain arteriovenous malformations after radiosurgery: diagnostic accuracy of contrast-enhanced four-dimensional MR angiography at 3.0 T

“…However, TOF MRA produces only static images of AVMs and lacks haemodynamic information. Another noninvasive technique, contrast-enhanced four-dimensional MRA (4D-MRA), is an emerging new technique without these limitations and demonstrates a good correlation with X-ray angiography with respect to the Spetzler-Martin classification on initial assessment of AVMs prior to treatment [7][8][9][10][11][12][13]. However, the diagnostic accuracy of 4D-MRA for the detection of residual AVMs after GKRS is not well known.…”