Evaluating quantitative approaches to dynamic susceptibility contrast MRI among carotid endarterectomy patients
Article first published online: 23 OCT 2012
Copyright © 2012 Wiley Periodicals, Inc.
Journal of Magnetic Resonance Imaging
Volume 37, Issue 4, pages 936–943, April 2013
How to Cite
Crane, D. E., Donahue, M. J., Chappell, M. A., Sideso, E., Handa, A., Kennedy, J., Jezzard, P. and MacIntosh, B. J. (2013), Evaluating quantitative approaches to dynamic susceptibility contrast MRI among carotid endarterectomy patients. J. Magn. Reson. Imaging, 37: 936–943. doi: 10.1002/jmri.23882
- Issue published online: 21 MAR 2013
- Article first published online: 23 OCT 2012
- Manuscript Accepted: 13 SEP 2012
- Manuscript Received: 9 JAN 2012
- Heart and Stroke Foundation Center for Stroke Recovery
- NIHR Oxford Partnership Comprehensive Biomedical Research Center
- dynamic susceptibility contrast;
- cerebral blood flow;
- carotid endarterectomy surgery;
- cerebrovascular disease;
To evaluate two dynamic susceptibility contrast (DSC) quantification methods in symptomatic carotid artery disease patients undergoing carotid endarterectomy (CEA) surgery by comparing methods directly and assessing the reliability of each method in the hemisphere contralateral to surgery.
Materials and Methods:
Absolute cerebral blood flow (CBF) and volume (CBV) was calculated in putamen and sensorimotor gray matter of 17 patients using two methods: 1) The Bookend method that scales relative DSC images to CBV values calculated from the ratio of pre- and postcontrast T1-weighted images, and 2) the Tail-scaling method that uses the ratio of area under the tails of the venous and arterial concentration time-courses to scale the DSC images.
There was a positive correlation between the methods with significant correlation post-CEA (P < 0.035). Intersession correlation was greater when using the Tail-scaling method contralateral to surgery (P < 0.004).
We have demonstrated correlation between methods that is significant after surgery and have found that the Tail-scaling method produces better test–retest reliability than our implementation of the Bookend method. Results from this study suggest that DSC has the potential to measure hemodynamic changes after endarterectomy and future work is required to establish clinical value. J. Magn. Reson. Imaging 2013;37:936–943. © 2012 Wiley Periodicals, Inc.