Normal Flow Signal of the Pterygoid Plexus on 3T MRA in Patients without DAVF of the Cavernous Sinus

Watanabe, Keita; Kakeda, Shingo; Watanabe, Rieko; Ohnari, Norihiro; Korogi, Yukunori

doi:10.3174/ajnr.a3377

Cited by 22 publications

(19 citation statements)

References 8 publications

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“…High signals originating from the reverse flow are frequently seen on 3-Tesla MRA [4]. Previous studies found a high signal in the CS on MRA in 43 (10.6%) of 406 healthy participants [4].…”

Section: Introductionmentioning

confidence: 92%

“…High signals originating from the reverse flow are frequently seen on 3-Tesla MRA [4]. Previous studies found a high signal in the CS on MRA in 43 (10.6%) of 406 healthy participants [4]. These findings are considered to indicate flow signals in the PP/emissary vein (EV) originating from the reverse flow, as in the internal jugular vein (IJV) and SS.…”

Section: Introductionmentioning

confidence: 98%

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High-signal venous sinuses on MR angiography: discrimination between reversal of venous flow and arteriovenous shunting using arterial spin labeling

et al. 2020

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Purpose It is sometimes difficult to differentiate between high signals originating from a reverse flow on magnetic resonance angiography (MRA) and occult arteriovenous shunting. We attempted to determine whether arterial spin labeling (ASL) can be used to discriminate reversal of venous flow from arteriovenous shunting for high-signal venous sinuses on MR angiography. Methods Two radiologists evaluated the signals of the venous sinus on MRA and ASL obtained from 364 cases without arteriovenous shunting. In addition, the findings on MRA were compared with those on ASL in an additional 13 patients who had dural arteriovenous fistula (DAVF). Results In the 364 cases (728 sides) without arteriovenous shunting, a high signal due to reverse flow in the cavernous sinuses (CS) was observed on 99 sides (13.6%) on MRA and none on ASL. Of these cases, a high signal in the sigmoid sinus, transverse sinus, and internal jugular vein was seen on 3, 3, and 8 sides, respectively. All of these venous sinuses showed a high signal from the reverse flow on MRA images. Conclusion ASL is a simple and useful MR imaging sequence for differentiating between reversal of venous flow and CS DAVF. In the sigmoid and transverse sinus, ASL showed false-positives due to the reverse flow from the jugular vein, which may be a limitation of which radiologists should be aware.

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“…High signals originating from the reverse flow are frequently seen on 3-Tesla MRA [4]. Previous studies found a high signal in the CS on MRA in 43 (10.6%) of 406 healthy participants [4].…”

Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 98%

High-signal venous sinuses on MR angiography: discrimination between reversal of venous flow and arteriovenous shunting using arterial spin labeling

et al. 2020

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“…The lack of hemodynamic information, however, limits their clinical usefulness (2)(3)(4). While four-dimensional (4D) contrast material-enhanced MR angiography at 3 T appears to be reliable and provides hemodynamic information on intracranial dural AVFs (5), it poses risks associated with contrast agents (6).…”

Section: Study Populationmentioning

confidence: 99%

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

Iryo

Hirai²,

Kai

et al. 2014

Radiology

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“…In this case, the left sigmoid to inferior petrous sinus was depicted on ASL-based 4D-MRA image. On a previous study on 3T time-of-flight (TOF) MRA, 10 this finding may be the result of flow reversal. The other venous structures including the superior sagittal sinus were not depicted on ASL-based 4D-MRA images.…”

Section: Discussionmentioning

confidence: 90%

Evaluation of Intracranial Vasculatures in Healthy Subjects with Arterial-Spin-Labeling-Based 4D-MR Angiography at 3T

Iryo

Hirai

Nakamura³

et al. 2016

MRMS

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Contrast inherent inflow-enhanced multi-phase angiography combining multiple-phase flow-alternating inversion-recovery (CINEMA-FAIR) is an arterial-spin-labeling-based four-dimensional magnetic resonance angiography (4D-MRA) technique. Two neuroradiologists independently evaluated the depiction of the intracranial vasculatures in healthy subjects with 3T 4D-MRA using CINEMA-FAIR. Our results indicated that this technique can provide good visualization of the cerebral arteries with a high spatial and temporal resolution. It appears to have sufficient resolution for identifying flow difference in the anterior and posterior circulation in healthy subjects.

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Normal Flow Signal of the Pterygoid Plexus on 3T MRA in Patients without DAVF of the Cavernous Sinus

Cited by 22 publications

References 8 publications

High-signal venous sinuses on MR angiography: discrimination between reversal of venous flow and arteriovenous shunting using arterial spin labeling

High-signal venous sinuses on MR angiography: discrimination between reversal of venous flow and arteriovenous shunting using arterial spin labeling

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

Evaluation of Intracranial Vasculatures in Healthy Subjects with Arterial-Spin-Labeling-Based 4D-MR Angiography at 3T

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