Intracranial vascular stenosis and occlusion: comparison of 3D time-of-flight and 3D phase-contrast MR angiography

Oelerich, M.; Lentschig, Markus; Zunker, P.; Reimer, Peter; Rummeny, Ernst J.; Schuierer, Gerhard

doi:10.1007/s002340050645

Cited by 74 publications

(45 citation statements)

References 16 publications

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“…For detecting high-grade stenosis, a recent study using 3T MRA showed a sensitivity of 78–85%, a specificity of 95%, a positive predictive value of 75–79%, and a negative predictive value of 95–97% [46]. For detecting 50–99% stenosis, previous studies using 1.5T MRA reported a sensitivity of 80–100% [19,47,48]. Another recent study using 1.5T MRA reported a sensitivity of 70% and a positive predictive value of 65% for detecting 30–99% stenosis [49].…”

Section: Discussionmentioning

confidence: 99%

Perforator Territory Infarction in the Lenticulostriate Arterial Territory: Mechanisms and Lesion Patterns Based on the Axial Location

Cho¹,

Roh²,

Moon³

et al. 2010

Eur Neurol

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Background: We hypothesized that perforator territory infarcts in the lenticulostriate territory (pLSAIs) may have heterogeneous lesion patterns and stroke mechanisms. Methods: We reviewed prospectively collected patients who developed pLSAIs within 72 h after stroke onset. Lesion patterns were analyzed based on the six axial levels. Based on MR angiography, stenosis of the middle cerebral artery (MCA) was classified into 3 groups. White matter hyperintensities were assessed by Fazeka’s scale of periventricular hyperintensity (PVH) and deep white matter hyperintensity (DWMH). Results: Of 221 patients, 159 were normal, 44 had mild stenosis, and 18 had severe stenosis of the MCA. Larger infarct volume was correlated with the severity of MCA disease (r = 0.289, p < 0.001). Lower lesion patterns were correlated with the severity of MCA disease (r = –0.294, p < 0.001). A higher lesion pattern was correlated with the severity of DWMH or PVH scores (r = 0.205, p = 0.002 in DWMH, and r = 0.137, p = 0.042 in PVH). Conclusions: Patients with MCA disease have larger and lower lesion patterns beginning from the proximal territory of the lenticulostriate artery (LSA). Patients with severe white matter changes have smaller and higher lesion patterns in the distal territory of the LSA.

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Section: Discussionmentioning

confidence: 99%

Perforator Territory Infarction in the Lenticulostriate Arterial Territory: Mechanisms and Lesion Patterns Based on the Axial Location

Cho¹,

Roh²,

Moon³

et al. 2010

Eur Neurol

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“…The most common application of 3D TOF is intracranial angiography (25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35)(36). In particular, 3D TOF has been used for diagnostic imaging of intracranial occlusions (32,33) as well as aneurysms (34,35).…”

Section: Applicationsmentioning

confidence: 99%

“…In particular, 3D TOF has been used for diagnostic imaging of intracranial occlusions (32,33) as well as aneurysms (34,35). The high resolution of the 3D acquisition provides excellent depiction of small intracranial vessels.…”

Section: Applicationsmentioning

confidence: 99%

Non‐contrast enhanced MR angiography: Physical principles

Wheaton

Miyazaki

2012

Magnetic Resonance Imaging

138

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Noncontrast‐enhanced magnetic resonance angiography (NCE‐MRA) methods have been demonstrated in anatomies throughout the body. Previously established NCE‐MRA techniques suffered from long scan times or low sensitivity. Advances in hardware and software have made NCE‐MRA scan times clinically feasible. Recent concerns over the safety of gadolinium‐based contrast material combined with the expense of the material and its administration have generated a demand for NCE‐MRA. In response, several new NCE‐MRA methods have been developed. The physical mechanisms underlying five general classes of NCE‐MRA methods (inflow effect, flow‐dependency on cardiac phase, flow‐encoding, spin labeling, and relaxation) are explained. The original techniques of time‐of‐flight (TOF) and phase contrast MRA (PC‐MRA) are briefly introduced. New developments in NCE‐MRA, including hybrid of opposite‐contrast (HOP‐MRA), four dimensional PC‐MRA (4D Flow), cardiac‐gated 3D fast‐spin‐echo, flow‐sensitive dephasing (FSD), arterial spin labeling (ASL), and balanced steady‐state free‐precession (bSSFP) are highlighted. The primary applications, advantages, and limitations of established and emerging NCE‐MRA techniques are discussed. J. Magn. Reson. Imaging 2012;36:286–304. © 2012 Wiley Periodicals, Inc.

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“…A spectral broadening with low-frequency parts in the spectra and harmonic vibrations of the vessel wall (musical murmurs) were noted and served as secondary criteria, interpreted only as vessel stenosis if they were associated with a segmental flow acceleration. 13 …”

Section: Partmentioning

confidence: 99%

Echo Contrast–Enhanced Transcranial Ultrasound

Zunker

Wilms

Brossmann

et al. 2002

Stroke

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Background and Purpose-The present study was undertaken to determine the frequency of use of the ultrasound contrast agent (UCA) Levovist in routine transcranial ultrasound (TU). Additionally, we evaluated the diagnostic validity of contrast-enhanced TU using 3-dimensional time of flight MR angiography. Methods-Indication for the UCA was an insufficient evaluation of the intracranial arteries after a combined approach with transcranial color-coded Duplex and transcranial Doppler examination. We prospectively analyzed every patient referred for TU over 6 months. Additionally, over a 3-month period, TU results were compared with 3-dimensional time-of-flight MR angiography . Results-Indication for use of UCA was met in 61 of 687 patients (8.8%). After UCA application, a diagnostic result was achieved in 75% of cases during transtemporal and in 81% during transforaminal insonation. The sensitivity and specificity of TU in the diagnosis of intracranial stenosis were 83% and 82%, respectively. Conclusions-Use of UCA was necessary in 8.8% of the patients. A diagnostic benefit was achieved in 75% to 80% of cases. Contrast-enhanced TU demonstrated a high sensitivity and specificity in the diagnosis of intracranial stenosis.

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Intracranial vascular stenosis and occlusion: comparison of 3D time-of-flight and 3D phase-contrast MR angiography

Cited by 74 publications

References 16 publications

Perforator Territory Infarction in the Lenticulostriate Arterial Territory: Mechanisms and Lesion Patterns Based on the Axial Location

Perforator Territory Infarction in the Lenticulostriate Arterial Territory: Mechanisms and Lesion Patterns Based on the Axial Location

Non‐contrast enhanced MR angiography: Physical principles

Echo Contrast–Enhanced Transcranial Ultrasound

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