Abstract
Objectives
The current gold standard in the assessment of lateral intracranial dural arteriovenous fistulas (LDAVF) is digital subtraction angiography (DSA). However, magnetic resonance imaging (MRI) is a non-invasive emerging tool for the evaluation of such lesions. The aim of our study was to compare the DSA to our 3 T MR-imaging protocol including a highly spatial resolved (ce-MRA) and a temporal resolved (“time-resolved imaging of contrast kinetics”, TRICKS) contrast-enhanced MR angiography to evaluate if solely DSA can remain the gold-standard imaging modality for the treatment planning of LDAVF.
Methods
We retrospectively reviewed matched pairs of DSA and 3 T MRI examinations of 24 patients with LDAVF (03/2008–04/2014) by the same list of relevant criteria for an endovascular LDAVF treatment planning. In particular, we determined intermodality agreement for the Cognard classification, the identifeication of arterial feeders, and the detailed assessment of each venous drainage pattern.
Results
Intermodality agreement for the Cognard classification was excellent (ĸ = 1.0). Whereas MRI failed in identifying small arterial feeders, it was superior to the DSA in the assessment of the sinus and the venous drainage pattern.
Conclusions
The combination of MRI and DSA is the new gold standard in LDAVF treatment planning.
Key Points
• DSA is superior to the MRI in detecting LDAVF arterial feeders.
• MRI excellently evaluates the venous side of an LDAVF.
• MRI can replace DSA in initial diagnosis and monitoring of LDAVF.
• MRI and DSA combined are the new gold standard in LDAVF treatment planning.
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Abbreviations
- LDAVF:
-
Lateral dural arteriovenous fistula
- DSA:
-
Digital subtraction angiography
- MRI:
-
Magnetic resonance imaging
- MRA:
-
Magnetic resonance angiography
- TRICKS:
-
Time-resolved imaging of contrast kinetics
- FLAIR:
-
Fluid-attenuated inversion recovery
- FSPGR:
-
Fast spoiled gradient echo
- TOF:
-
Time of flight
- ce-MRA:
-
Contrast-enhanced magnetic resonance angiography
- TR:
-
Repetition time
- TE:
-
Echo time
- FOV:
-
Field of view
- ST:
-
Slice thickness
- PACS:
-
Picture archiving and communication system
- AOE:
-
A. occipitalis externa
- AMM:
-
A. meningea media
- AAP:
-
A. auricularis posterior
- APharAsc:
-
A. pharyngea ascendens
- ATent:
-
A. tentorii
- AMP:
-
A. meningea posterior
- VA:
-
Vertebral artery
- BJV:
-
Bulb of jugular vein
- SigS:
-
Sigmoid sinus
- TrS:
-
Transverse sinus
- CS:
-
Confluence of sinuses
- StrS:
-
Straight sinus
- SSS:
-
Superior sagittal sinus
- SD:
-
Standard deviation
- DWI :
-
Diffusion weighted imaging
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Acknowledgments
Our special thanks are extended to Dr. A. Crispin (Institute for Medical Informatics, Biometry and Epidemiology, University of Munich) for his professional guidance and valuable statistical advice. The scientific guarantor of this publication is Prof. H. Brückmann. The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article. The authors state that this work has not received any funding. Institutional Review Board approval was obtained. Written informed consent was waived by the Institutional Review Board. Part of the data (patient overlap: 20) was presented in the annual meeting of the German Society of Neuroradiology in 10/2013 and awarded as best presentation by „Der Lebenszweig e.V. - Verein für Hirn-Aneurysma-Erkrankte“ (patient association). Distinct from our paper submitted in European Radiology, it was a single-reader-only comparison of MRT and DSA in terms of visibility and grading of intracranial dural fistulas. The collective included different types of fistulas (lateral type and carotid-cavernosus-fistulae). It did not provide any detailed aspects on therapy planning (luminal patency, flow direction, cervical drainage, best method, etc.) and was not published as an original research paper. Methodology: retrospective, not applicable, performed at one institution.
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Ertl, L., Brückmann, H., Kunz, M. et al. Assessment and treatment planning of lateral intracranial dural arteriovenous fistulas in 3 T MRI and DSA: A detailed analysis under consideration of time-resolved imaging of contrast kinetics (TRICKS) and ce-MRA sequences. Eur Radiol 26, 4284–4292 (2016). https://doi.org/10.1007/s00330-016-4335-1
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DOI: https://doi.org/10.1007/s00330-016-4335-1