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Published in: Neuroradiology 6/2021

01-06-2021 | Angiography | Diagnostic Neuroradiology

Evaluation of cerebral arteriovenous shunts: a comparison of parallel imaging time-of-flight magnetic resonance angiography (TOF-MRA) and compressed sensing TOF-MRA to digital subtraction angiography

Authors: Akihiko Sakata, Yasutaka Fushimi, Tomohisa Okada, Satoshi Nakajima, Takuya Hinoda, Peter Speier, Michaela Schmidt, Christoph Forman, Kazumichi Yoshida, Hiroharu Kataoka, Susumu Miyamoto, Yuji Nakamoto

Published in: Neuroradiology | Issue 6/2021

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Abstract

Purpose

Time-of-flight (TOF)-MR angiography (MRA) is an important imaging sequence for the surveillance and analysis of cerebral arteriovenous shunt (AVS), including arteriovenous malformation (AVM) and arteriovenous fistula (AVF). However, this technique has the disadvantage of a relatively long scan time. The aim of this study was to compare diagnostic accuracy between compressed sensing (CS)-TOF and conventional parallel imaging (PI)-TOF-MRA for detecting and characterizing AVS.

Methods

This study was approved by the institutional review board for human studies. Participants comprised 56 patients who underwent both CS-TOF-MRA and PI-TOF-MRA on a 3-T MR unit with or without cerebral AVS between June 2016 and September 2018. Imaging parameters for both sequences were almost identical, except the acceleration factor of 3× for PI-TOF-MRA and 6.5× for CS-TOF-MRA, and the scan time of 5 min 19 s for PI-TOF-MRA and 2 min 26 s for CS-TOF-MRA. Two neuroradiologists assessed the accuracy of AVS detection on each sequence and analyzed AVS angioarchitecture. Concordance between CS-TOF, PI-TOF, and digital subtraction angiography was calculated using unweighted and weighted kappa statistics.

Results

Both CS-TOF-MRA and PI-TOF-MRA yielded excellent sensitivity and specificity for detecting intracranial AVS (reviewer 1, 97.3%, 94.7%; reviewer 2, 100%, 100%, respectively). Interrater agreement on the angioarchitectural features of intracranial AVS on CS-MRA and PI-MRA was moderate to good.

Conclusion

The diagnostic performance of CS-TOF-MRA is comparable to that of PI-TOF-MRA in detecting and classifying AVS with a reduced scan time under 2.5 min.
Appendix
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Metadata
Title
Evaluation of cerebral arteriovenous shunts: a comparison of parallel imaging time-of-flight magnetic resonance angiography (TOF-MRA) and compressed sensing TOF-MRA to digital subtraction angiography
Authors
Akihiko Sakata
Yasutaka Fushimi
Tomohisa Okada
Satoshi Nakajima
Takuya Hinoda
Peter Speier
Michaela Schmidt
Christoph Forman
Kazumichi Yoshida
Hiroharu Kataoka
Susumu Miyamoto
Yuji Nakamoto
Publication date
01-06-2021
Publisher
Springer Berlin Heidelberg
Published in
Neuroradiology / Issue 6/2021
Print ISSN: 0028-3940
Electronic ISSN: 1432-1920
DOI
https://doi.org/10.1007/s00234-020-02581-y

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