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Three‐dimensional dynamic time‐resolved contrast‐enhanced MRA using parallel imaging and a variable rate k‐space sampling strategy in intracranial arteriovenous malformations
Authors:Mina Petkova MD  Jean‐Yves Gauvrit MD  PhD  Denis Trystram MD  François Nataf MD  Sylvie Godon‐Hardy MD  Thierry Munier MSc  Catherine Oppenheim MD  PhD  Jean‐François Meder MD  PhD
Affiliation:1. Department of Neuroradiology and Neurosurgery, Sainte‐Anne Hospital, Paris 5 University, Paris, France;2. Department of Neuroimaging, Pontchaillou Hospital, Rennes, France;3. General Electric Healthcare Technologies, Buc, France
Abstract:

Purpose

To evaluate the effectiveness of three‐dimensional (3D) dynamic time‐resolved contrast‐enhanced MRA (TR‐CE‐MRA) using a combination of a parallel imaging technique (ASSET: array spatial sensitivity encoding technique) and a time‐resolved method (TRICKS: time‐resolved imaging of contrast kinetics) and to compare it with 3D dynamic TR‐CE‐MRA using ASSET alone in the assessment of intracranial arteriovenous malformations (AVMs).

Materials and Methods

Twenty consecutive patients with angiographically confirmed AVMs were investigated using both 3D dynamic TR‐CE‐MRA techniques. Examinations were compared with respect to image quality, spatial resolution, number and type of feeders and drainers, nidus size, presence of early venous filling and temporal resolution. Digital subtraction angiography was used as standard of reference.

Results

The higher temporal and spatial resolution of 3D dynamic TR‐CE‐MRA TRICKS ASSET allowed a better assessment of intracranial vascular malformations, namely better depiction of feeders, drainers and better detection of early venous drainage. There was no significant difference between them in terms of nidus size.

Conclusion

3D dynamic TR‐CE‐MRA combining parallel imaging and a time‐resolved method with subsecond and submillimeter resolution could become the first‐line investigation technique in both diagnosis and follow‐up of intracranial AVMs. J. Magn. Reson. Imaging 2009;29:7–12. © 2008 Wiley‐Liss, Inc.
Keywords:3D dynamic time‐resolved contrast‐enhanced MRA  TRICKS  intracranial arteriovenous malformation  digital subtraction angiography
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