Comparison of Time-of-Flight–Magnetic Resonance Angiography From Silent Scan Magnetic Resonance Angiography in Depiction of Arteriovenous Malformation of the Brain

Tomura, Noriaki; Saginoya, Toshiyuki; Kokubun, Mika; Horiuchi, Kazuomi; Watanabe, Zenichiro

doi:10.1097/rct.0000000000000935

Cited by 6 publications

(7 citation statements)

References 19 publications

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“…Seventy-three out of all 81 draining veins (90.1%) were detected on silent MRA in our study. Comparably, previous studies have also found that a small portion of draining veins of BAVM could not be visualized on silent MRA [11][12][13][14], yet few tried to explain this phenomenon. In the current study, the non-visualized draining veins were all observed more than 4 frames after nidal visualization on DSA, suggesting that those missing draining veins in silent MRA may be a consequence of slow blood flow.…”

Section: Discussionmentioning

confidence: 87%

“…Silent MR angiography is a new imaging approach based on arterial spin labeling (ASL) and zero time echo (ZTE) techniques and does not require a contrast agent [11]. Several studies have reported that silent MRA achieved better performance in depicting the nidus and draining veins of BAVM compared to time-of-flight MR angiography (TOF MRA) [12][13][14]. In these studies, a portion of the draining veins of BAVM still could not be observed on silent MRA.…”

Section: Introductionmentioning

confidence: 99%

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Signal intensity ratio of draining vein on silent MR angiography as an indicator of high-flow arteriovenous shunt in brain arteriovenous malformation

Zang

Hong

et al. 2021

Eur Radiol

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Objectives To evaluate whether the signal intensity ratio (rSI) of the draining vein on silent MR angiography is correlated with arteriovenous (A–V) transit time on digital subtraction angiography (DSA), thereby identifying high-flow A–V shunt in brain arteriovenous malformation (BAVM), and to analyze whether the rSI and the characteristic of draining veins on silent MRA are associated with hemorrhage presentation. Methods Eighty-one draining veins of 46 participants with BAVM (mean age 33.2 ± 16.9 years) who underwent silent MRA and DSA were evaluated retrospectively. The correlation between the rSI of the draining vein on silent MRA and A–V transit time on DSA was examined. The AUC-ROC was obtained to evaluate the performance of the rSI in determining the presence of high-flow A–V shunt. The characteristics of draining veins with the maximum rSI (rSImax) were further compared between the hemorrhagic and non-hemorrhagic untreated BAVM. Results The rSI of each draining vein on silent MRA was significantly correlated with A–V transit time from DSA (r = −0.81, p < .001). The AUC-ROC was 0.89 for using the rSI to determine the presence of high-flow A–V shunt. A cut-off rSI value of 1.09 yielded a sensitivity of 82.4% and a specificity of 82.8%. The draining vein with rSImax and no ectasia was significantly more observed in the hemorrhagic group (p = 0.045). Conclusions The rSI of the draining vein on silent MRA is significantly correlated with A–V transit time on DSA, and it can be used as an indicator of high-flow A–V shunt in BAVM. Key Points • The signal intensity ratio (rSI) of the draining vein on silent MRA significantly correlated with arteriovenous (A–V) transit time of brain arteriovenous malformation (BAVM) on digital subtraction angiography (DSA). • The area under the receiver operating characteristic curve (AUC) was 0.89 for using the rSI of draining veins to determine high-flow A–V shunt. • Draining veins with maximum rSI and no ectasia were significantly more observed in the hemorrhagic group of BAVM (p = 0.045).

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Section: Discussionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Signal intensity ratio of draining vein on silent MR angiography as an indicator of high-flow arteriovenous shunt in brain arteriovenous malformation

Zang

Hong

et al. 2021

Eur Radiol

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“…However, this invasive technique carries a risk of neurological complications and adverse reactions associated with the contrast agent as well as the exposure to ionizing radiation during the procedure. Various non-or less-invasive imaging techniques have thus been applied to the evaluation of AVS [12][13][14][15][16][17][18][19][20][21][22]. Time-of-flight (TOF)-MRA has been the most widely used of these in clinical practice.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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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.

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“…[ 1 ] MRA with ultrashort echo time (UTE-MRA) reduces metal artifact,[ 3 , 7 - 9 ] and its usefulness is reported for the assessment of the internal flow in the intracranial stent,[ 4 , 10 ] moyamoya disease,[ 12 ] and arteriovenous malformation. [ 13 ] Besides, 1.5T UTE-MRA revealed the artery in the vicinity of a clip,[ 5 ] but the obtained image is too rough to evaluate the aneurysm remnant, and its description range is too narrow to assess the cerebral vasospasm especially of the peripheral portion. Therefore, 1.5T UTE-MRA does not yet have the clinically required quality as a usual follow-up after clipping.…”

Section: Image Reportmentioning

confidence: 99%

Three tesla magnetic resonance angiography with ultrashort echo time describes the arteries near the cerebral aneurysm with clip and the peripheral cerebral arteries

Katsuki

Narita

Ozaki

et al. 2020

Surgical Neurology International

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Background: The assessment of the clipped cerebral aneurysm and the cerebral arteries after the treatment of subarachnoid hemorrhage (SAH) is important to find aneurysm regrowth or postoperative cerebral vasospasm. Usually, contrast-enhanced computed tomography angiography is performed for the evaluation of the arteries, but it has side effects of contrast medium. Time-of-flight magnetic resonance angiography (MRA) is a fast and non-invasive method, but clip-induced artifact limits assessment of the artery in the vicinity of the clip. 1.5T MRA with ultrashort echo time (UTE) reduces metal artifact, but the obtained image is too rough to evaluate the aneurysm remnant, and the description range is too narrow to assess the cerebral vasospasm. We routinely use SIGNA Pioneer 3.0T (GE Healthcare Life Sciences, Buckinghamshire, England) and perform SILENT SCAN with UTE-MRA for the postoperative assessment of the clipped aneurysm and cerebral arteries for SAH patients treated by clipping. It has better image quality and describes arteries with a wide description range, so it possesses the potential to overcome the disadvantages of 1.5T UTE-MRA. Case Description: We presented a representative SAH patient who postoperatively underwent 3.0T UTE- MRA after clipping. The artery near the clipped aneurysm was evaluated in detail, and the cerebral arteries were described from the main trunk to the peripheral parts with a wide description range, which enabled the assessment of cerebral vasospasm. Conclusion: 3.0T UTE-MRA may be helpful for the usual assessment of the arteries after clipping and cerebral vasospasm in the future.

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Comparison of Time-of-Flight–Magnetic Resonance Angiography From Silent Scan Magnetic Resonance Angiography in Depiction of Arteriovenous Malformation of the Brain

Cited by 6 publications

References 19 publications

Signal intensity ratio of draining vein on silent MR angiography as an indicator of high-flow arteriovenous shunt in brain arteriovenous malformation

Signal intensity ratio of draining vein on silent MR angiography as an indicator of high-flow arteriovenous shunt in brain arteriovenous malformation

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

Three tesla magnetic resonance angiography with ultrashort echo time describes the arteries near the cerebral aneurysm with clip and the peripheral cerebral arteries

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