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Time-Resolved Spinal MR Angiography: Initial Clinical Experience in the Evaluation of Spinal Arteriovenous Shunts

Time-Resolved Spinal MR Angiography: Initial Clinical Experience in the Evaluation of Spinal... This Article Figures Only Full Text Full Text (PDF) All Versions of this Article: ajnr.A0639v1 28/9/1806 most recent Alert me when this article is cited Alert me if a correction is posted Citation Map Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by Ali, S. Articles by Walker, M.T. Search for Related Content PubMed PubMed Citation Articles by Ali, S. Articles by Walker, M.T. Hotlight (NEW!) What's Hotlight? American Journal of Neuroradiology 28:1806-1810, October 2007 © 2007 American Society of Neuroradiology SPINE Time-Resolved Spinal MR Angiography: Initial Clinical Experience in the Evaluation of Spinal Arteriovenous Shunts S. Ali a , T.A. Cashen a ,b , T.J. Carroll a ,b , E. McComb a , M. Muzaffar a , A. Shaibani a and M.T. Walker a a Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, Ill b Department of Biomedical Engineering, Northwestern University, Chicago, Ill Please address correspondence to Saad Ali, 676 N St Clair, Suite 1400, Chicago, IL 60611; e-mail: saad-ali@northwestern.edu BACKGROUND AND PURPOSE: Spinal arteriovenous shunts usually require digital subtraction angiography (DSA) for evaluation. We report a unique time-resolved spinal MR angiographic (TRSMRA) technique with a temporal resolution of 3–6 seconds and spatial resolution of approximately 1 mm 3 that has the potential to noninvasively detect, localize, and follow-up these cases. MATERIALS AND METHODS: Eleven patients with clinical presentation and/or MR findings suspicious for a spinal arteriovenous shunt were referred for TRSMRA. Patients subsequently underwent spinal DSA to confirm the presence or absence of a shunt or were followed clinically until an alternative diagnosis was found. TRSMRA was also used to predict the level of the shunt in the positive cases. In addition, 2 of these patients as well as a 12th patient referred to us posttreatment received a follow-up TRSMRA to assess treatment outcome. RESULTS: Early venous shunting was identified by using TRSMRA in 6 cases. All 6 were confirmed to have an AV shunt on subsequent spinal DSA. The shunt level predicted by TRSMRA consistently correlated with DSA to within 1 vertebral level. In the 5 patients with a negative screening TRSMRA, DSA or clinical outcome confirmed the absence of an arteriovenous shunt in all of the cases. Posttreatment TRSMRA in 3 patients accurately assessed the success or failure of treatment. CONCLUSION: Combining acceleration techniques to achieve high frame rate TRSMRA provides sufficient temporal and spatial resolution to identify, localize, and follow patients suspected of having a spinal arteriovenous shunt. Further study in a larger population is warranted to assess the accuracy of this technique. This article has been cited by other articles: N. Fujima, K. Kudo, S. Terae, K. Hida, K. Ishizaka, Y. Zaitsu, T. Asano, D. Yoshida, K. K. Tha, E. M. Haacke, et al. Spinal Arteriovenous Malformation: Evaluation of Change in Venous Oxygenation with Susceptibility-weighted MR Imaging after Treatment Radiology, March 1, 2010; 254(3): 891 - 899. Abstract Full Text PDF Home Subscribe Author Instructions Submit Online Search the AJNR Archives Feedback Help Copyright © 2010 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png American Journal of Neuroradiology American Journal of Neuroradiology

Time-Resolved Spinal MR Angiography: Initial Clinical Experience in the Evaluation of Spinal Arteriovenous Shunts

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Publisher
American Journal of Neuroradiology
Copyright
Copyright © 2010 by the American Society of Neuroradiology.
ISSN
0195-6108
eISSN
1936-959X
DOI
10.3174/ajnr.A0639
Publisher site
See Article on Publisher Site

Abstract

This Article Figures Only Full Text Full Text (PDF) All Versions of this Article: ajnr.A0639v1 28/9/1806 most recent Alert me when this article is cited Alert me if a correction is posted Citation Map Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by Ali, S. Articles by Walker, M.T. Search for Related Content PubMed PubMed Citation Articles by Ali, S. Articles by Walker, M.T. Hotlight (NEW!) What's Hotlight? American Journal of Neuroradiology 28:1806-1810, October 2007 © 2007 American Society of Neuroradiology SPINE Time-Resolved Spinal MR Angiography: Initial Clinical Experience in the Evaluation of Spinal Arteriovenous Shunts S. Ali a , T.A. Cashen a ,b , T.J. Carroll a ,b , E. McComb a , M. Muzaffar a , A. Shaibani a and M.T. Walker a a Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, Ill b Department of Biomedical Engineering, Northwestern University, Chicago, Ill Please address correspondence to Saad Ali, 676 N St Clair, Suite 1400, Chicago, IL 60611; e-mail: saad-ali@northwestern.edu BACKGROUND AND PURPOSE: Spinal arteriovenous shunts usually require digital subtraction angiography (DSA) for evaluation. We report a unique time-resolved spinal MR angiographic (TRSMRA) technique with a temporal resolution of 3–6 seconds and spatial resolution of approximately 1 mm 3 that has the potential to noninvasively detect, localize, and follow-up these cases. MATERIALS AND METHODS: Eleven patients with clinical presentation and/or MR findings suspicious for a spinal arteriovenous shunt were referred for TRSMRA. Patients subsequently underwent spinal DSA to confirm the presence or absence of a shunt or were followed clinically until an alternative diagnosis was found. TRSMRA was also used to predict the level of the shunt in the positive cases. In addition, 2 of these patients as well as a 12th patient referred to us posttreatment received a follow-up TRSMRA to assess treatment outcome. RESULTS: Early venous shunting was identified by using TRSMRA in 6 cases. All 6 were confirmed to have an AV shunt on subsequent spinal DSA. The shunt level predicted by TRSMRA consistently correlated with DSA to within 1 vertebral level. In the 5 patients with a negative screening TRSMRA, DSA or clinical outcome confirmed the absence of an arteriovenous shunt in all of the cases. Posttreatment TRSMRA in 3 patients accurately assessed the success or failure of treatment. CONCLUSION: Combining acceleration techniques to achieve high frame rate TRSMRA provides sufficient temporal and spatial resolution to identify, localize, and follow patients suspected of having a spinal arteriovenous shunt. Further study in a larger population is warranted to assess the accuracy of this technique. This article has been cited by other articles: N. Fujima, K. Kudo, S. Terae, K. Hida, K. Ishizaka, Y. Zaitsu, T. Asano, D. Yoshida, K. K. Tha, E. M. Haacke, et al. Spinal Arteriovenous Malformation: Evaluation of Change in Venous Oxygenation with Susceptibility-weighted MR Imaging after Treatment Radiology, March 1, 2010; 254(3): 891 - 899. Abstract Full Text PDF Home Subscribe Author Instructions Submit Online Search the AJNR Archives Feedback Help Copyright © 2010 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X

Journal

American Journal of NeuroradiologyAmerican Journal of Neuroradiology

Published: Oct 1, 2007

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