Evaluation of cerebral arteriovenous shunts: a comparison of parallel imaging time-of-flight magnetic resonance angiogra
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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 Akihiko Sakata 1 & Yasutaka Fushimi 1 & Tomohisa Okada 2 & Satoshi Nakajima 1 & Takuya Hinoda 1 & Peter Speier 3 & Michaela Schmidt 3 & Christoph Forman 3 & Kazumichi Yoshida 4 & Hiroharu Kataoka 4 & Susumu Miyamoto 4 & Yuji Nakamoto 1 Received: 27 July 2020 / Accepted: 6 October 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
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-TOFMRA 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. Keywords Compressed sensing . Parallel imaging . MR angiography . Arteriovenous malformation . Arterial venous fistula
Abbreviations CS Compressed sensing PI Parallel imaging MRA MR angiography
AVM AVF DSA AVS
Arteriovenous malformation Arterial venous fistula Digital subtraction angiography Arteriovenous shunt
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00234-020-02581-y) contains supplementary material, which is available to authorized users. * Yasutaka Fushimi [email protected] 1
Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
2
Human Brain Research Center, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
3
Sieme
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