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Conventional MRI and MR Angiography of Stroke

  • David Vu
  • R. Gilberto González
  • Pamela W. Schaefer

6.2.9 Conclusion

In the setting of acute stroke, MRA is useful for determining the severity of stenosis, vascular occlusion, and collateral flow. CE MRA and 3D TOF techniques have relatively high sensitivity and specificity in differentiating surgical from nonsurgical carotid stenoses. Three-dimensional TOF MRA is quite sensitive and specific for the evaluation of intracranial proximal stenoses and occlusions. Two-dimensional PC MRA is useful for determining collateral flow patterns in the circle of Willis. MRA is also useful in the determination of stroke etiologies such as dissection, fibromuscular dysplasia, vasculitis, and moya moya. Currently, MRA is relatively insensitive to the detection of stenoses in distal intracranial vessels but this detection will improve with new MR hardware and software.

Keywords

Internal Carotid Artery Vertebral Artery Maximum Intensity Projection Image Vertebral Artery Dissection Carotid Artery Dissection 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • David Vu
    • 1
  • R. Gilberto González
    • 1
  • Pamela W. Schaefer
    • 2
  1. 1.Neuroradiology DivisionMassachusetts General Hospital and Harvard Medical SchoolBostonUSA
  2. 2.NeuroradiologyMassachusetts General HospitalBoston

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