Intracranial Dural Arteriovenous Fistulas: Evaluation with 3-T Four-dimensional MR Angiography Using Arterial Spin Labeling

Iryo, Yasuhiko; Hirai, Toshinori; Kai, Yutaka; Nakamura, Masanobu; Shigematsu, Yosuke; Kitajima, Mika; Azuma, Minako; Komi, Masanori; Morita, Kosuke; Yamashita, Yasuyuki

doi:10.1148/radiol.13122670

Cited by 48 publications

(37 citation statements)

References 10 publications

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“…28,29 Our current study demonstrated very good agreement between 3D TOF MRA and DSA findings for the main arte- rial feeders. In assessing main arterial feeders, intermodality agreement is better for 3D TOF MRA than for these 4D MRA techniques.…”

Section: Discussionsupporting

confidence: 72%

“…Recent 3T 4-dimensional (4D) MRA techniques, i.e., 4D contrast-enhanced MRA and 4D arterial spin labeling-based MRA, can provide hemodynamic information regarding intracranial DAVFs, [28][29][30] but these techniques are not so reliable for assessing arterial feeders of DAVFs. 28,29 Our current study demonstrated very good agreement between 3D TOF MRA and DSA findings for the main arte- rial feeders.…”

Section: Discussionmentioning

confidence: 99%

“…In assessing main arterial feeders, intermodality agreement is better for 3D TOF MRA than for these 4D MRA techniques. 28,29 This is probably due to the difference in spatial resolution of these techniques, i.e., 0.25 © 0.25 © 0.5 mm 3 for 3D TOF MRA and 0.5 to 1.0 © 0.5 to 1.0 © 0.6 to 1.5 mm 3 for 4D MRA techniques. 28,29 With regard to venous drainage, intermodality agreement is worse for 3D TOF MRA than for these 4D MRA techniques, 28,29 probably because 3D TOF MRA does not provide hemodynamic information for intracranial DAVFs.…”

Section: Discussionmentioning

confidence: 99%

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Evaluation of Intracranial Dural Arteriovenous Fistulas: Comparison of Unenhanced 3T 3D Time-of-flight MR Angiography with Digital Subtraction Angiography

Azuma

Hirai

Shigematsu

et al. 2015

MRMS

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Purpose: We compared gross characterization of intracranial dural arteriovenous fistulas (DAVFs) between unenhanced 3-tesla 3-dimensional (3D) time-of-flight (TOF) magnetic resonance angiography (MRA) and digital subtraction angiography (DSA).Methods: We subjected 26 consecutive patients with intracranial DAVF to unenhanced 3T 3D TOF MRA and to DSA. Two independent sets of observers inspected the main arterial feeders, fistula site, and venous drainage pattern on MRA and DSA images. Interobserver and intermodality agreements were assessed by k statistics.Results: Interobserver agreement was excellent for fistula site (¬ = 0.919; 95% confidence interval [CI], 0.805 to 1.000), good for main arterial feeders (¬ = 0.711; 95% CI, 0.483 to 0.984), and very good for venous drainage (¬ = 0.900; 95% CI, 0.766 to 1.000). Intermodality agreement was excellent for fistula site (¬ = 0.968; 95% CI, 0.906 to 1.000) and good for main arterial feeder (¬ = 0.809; 95% CI, 0.598 to 1.000) and venous drainage (¬ = 0.837; 95% CI, 0.660 to 1.000).Conclusion: Gross characterization of intracranial DAVF was similar for both imaging modalities, but unenhanced 3T 3D TOF MRA cannot replace DSA.

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Section: Discussionsupporting

confidence: 72%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Evaluation of Intracranial Dural Arteriovenous Fistulas: Comparison of Unenhanced 3T 3D Time-of-flight MR Angiography with Digital Subtraction Angiography

Azuma

Hirai

Shigematsu

et al. 2015

MRMS

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“…As a similar sequence to silent MRA, Iryo et al 24 reported the contrast inherent inflow-enhanced multiphase angiography, or CINEMA, sequence. The CINEMA sequence is a non-contrastenhanced MRA using arterial spin-labeling, such as silent MRA.…”

Section: Discussionmentioning

confidence: 99%

Usefulness of Non–Contrast-Enhanced MR Angiography Using a Silent Scan for Follow-Up after Y-Configuration Stent-Assisted Coil Embolization for Basilar Tip Aneurysms

Takano

Suzuki

Irie

et al. 2016

AJNR Am J Neuroradiol

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BACKGROUND AND PURPOSE: Y-configuration stent-assisted coil embolization is used for treating wide-neck aneurysms. Noninvasive alternatives to x-ray DSA for follow-up after Y-configuration stent-assisted coil embolization treatment are required. This study aimed to assess the usefulness of non-contrast-enhanced MRA by using a Silent Scan (silent MRA) for follow-up after Y-configuration stent-assisted coil embolization for basilar tip aneurysms.

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“…Arterial spin labeling (ASL) techniques are used both for noncontrast 4D‐MRA as well as for perfusion imaging. Because both imaging modalities are based on a similar ASL preparation module, a combined acquisition seems feasible.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous acquisition of perfusion image and dynamic MR angiography using time‐encoded pseudo‐continuous ASL

Suzuki

Helle

Koken

et al. 2017

Magnetic Resonance in Med

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PurposeBoth dynamic magnetic resonance angiography (4D‐MRA) and perfusion imaging can be acquired by using arterial spin labeling (ASL). While 4D‐MRA highlights large vessel pathology, such as stenosis or collateral blood flow patterns, perfusion imaging provides information on the microvascular status. Therefore, a complete picture of the cerebral hemodynamic condition could be obtained by combining the two techniques. Here, we propose a novel technique for simultaneous acquisition of 4D‐MRA and perfusion imaging using time‐encoded pseudo‐continuous arterial spin labeling.MethodsThe time‐encoded pseudo‐continuous arterial spin labeling module consisted of a first subbolus that was optimized for perfusion imaging by using a labeling duration of 1800 ms, whereas the other six subboli of 130 ms were used for encoding the passage of the labeled spins through the arterial system for 4D‐MRA acquisition. After the entire labeling module, a multishot 3D turbo‐field echo‐planar‐imaging readout was executed for the 4D‐MRA acquisition, immediately followed by a single‐shot, multislice echo‐planar‐imaging readout for perfusion imaging. The optimal excitation flip angle for the 3D turbo‐field echo‐planar‐imaging readout was investigated by evaluating the image quality of the 4D‐MRA and perfusion images as well as the accuracy of the estimated cerebral blood flow values.ResultsWhen using 36 excitation radiofrequency pulses with flip angles of 5 or 7.5°, the saturation effects of the 3D turbo‐field echo‐planar‐imaging readout on the perfusion images were relatively moderate and after correction, there were no statistically significant differences between the obtained cerebral blood flow values and those from traditional time‐encoded pseudo‐continuous arterial spin labeling.ConclusionsThis study demonstrated that simultaneous acquisition of 4D‐MRA and perfusion images can be achieved by using time‐encoded pseudo‐continuous arterial spin labeling. Magn Reson Med 79:2676–2684, 2018. © 2017 The Authors Magnetic Resonance in Medicine published by Wiley Periodicals, Inc. on behalf of International Society for Magnetic Resonance in Medicine. This is an open access article under the terms of the Creative Commons Attribution NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

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Intracranial Dural Arteriovenous Fistulas: Evaluation with 3-T Four-dimensional MR Angiography Using Arterial Spin Labeling

Abstract: The good-to-excellent agreement between 3-T 4D ASL MR angiographic and DSA findings suggests that 3-T 4D ASL MR angiography is a useful tool for the evaluation of intracranial dural AVFs.

Cited by 48 publications

References 10 publications

Evaluation of Intracranial Dural Arteriovenous Fistulas: Comparison of Unenhanced 3T 3D Time-of-flight MR Angiography with Digital Subtraction Angiography

Evaluation of Intracranial Dural Arteriovenous Fistulas: Comparison of Unenhanced 3T 3D Time-of-flight MR Angiography with Digital Subtraction Angiography

Usefulness of Non–Contrast-Enhanced MR Angiography Using a Silent Scan for Follow-Up after Y-Configuration Stent-Assisted Coil Embolization for Basilar Tip Aneurysms

Simultaneous acquisition of perfusion image and dynamic MR angiography using time‐encoded pseudo‐continuous ASL

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