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Tytuł:
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Clinical evaluation of subtracted pointwise encoding time reduction with radial acquisition-based magnetic resonance angiography compared to 3D time-of-flight magnetic resonance angiography for improved flow dephasing at 3 Tesla.
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Autorzy:
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Fu Q; Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Province Key Laboratory of Molecular Imaging, Wuhan 430022, China. Electronic address: .
Zhang XY; MR Collaborations, Siemens Healthcare Ltd., Shenzhen 518000, China. Electronic address: .
Deng XB; Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Province Key Laboratory of Molecular Imaging, Wuhan 430022, China. Electronic address: .
Liu DX; Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Province Key Laboratory of Molecular Imaging, Wuhan 430022, China. Electronic address: .
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Źródło:
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Magnetic resonance imaging [Magn Reson Imaging] 2020 Nov; Vol. 73, pp. 104-110. Date of Electronic Publication: 2020 Aug 26.
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Typ publikacji:
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Comparative Study; Journal Article
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Język:
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English
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Imprint Name(s):
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Publication: <2008->: Amsterdam : Elsevier
Original Publication: New York : Pergamon, c1982-
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MeSH Terms:
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Magnetic Resonance Angiography*
Imaging, Three-Dimensional/*methods
Adult ; Aged ; Artifacts ; Female ; Humans ; Intracranial Aneurysm/diagnostic imaging ; Male ; Middle Aged
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Contributed Indexing:
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Keywords: 3T; Flow dephasing; Internal carotid artery; Magnetic resonance angiography; PETRA; Signal loss
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Entry Date(s):
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Date Created: 20200829 Date Completed: 20210203 Latest Revision: 20210203
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Update Code:
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20240105
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DOI:
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10.1016/j.mri.2020.08.015
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PMID:
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32858182
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Objective: Flow dephasing artifacts within intracranial internal carotid artery (ICA) have been problematic for 3D time-of-flight magnetic resonance angiography (3D-TOF-MRA). This study aimed to evaluate pointwise encoding time reduction with radial acquisition subtraction-based MR angiography (PETRA-MRA) for decreasing flow dephasing artifacts compared to 3D-TOF-MRA in intracranial segments of ICA at 3 T.
Methods: Sixty healthy participants and seven patients with intracranial ICA aneurysms were enrolled to undergo 3D-TOF-MRA and PETRA-MRA. Two radiologists each evaluated the image quality of healthy participants using a 4-point scale (1: the best and 4: the worst). Quantitative analysis of the extent of homogeneity in signal intensity within the ICA and intracranial aneurysms was conducted using a parameter d: the higher the d value, the greater the signal homogeneity. Wilcoxon signed rank test, Chi-square test and the weighted kappa (κ) statistic were used for statistical analyses.
Results: The image quality of PETRA-MRA with an overall score of 1.35 ± 0.53 was significantly better than that obtained with 3D-TOF-MRA, with an overall score of 3.50 ± 0.62 (Z = -9.56, p < 0.001). The parameter d of PETRA-MRA was higher than that of 3D-TOF-MRA for both 60 healthy participants (0.97 ± 0.05, 0.87 ± 0.11; z = -13.21, p < 0.001) and 7 patients with intracranial aneurysms (0.81 ± 0.18, 0.74 ± 0.16; z = -2.37, p = 0.018).
Conclusion: Compared with conventional 3D-TOF-MRA, PETRA-MRA remarkably improved the image quality with reduced flow dephasing artifacts in segments of intracranial ICA.
Competing Interests: Declaration of Competing Interest The authors declare no conflict of interest.
(Copyright © 2020 Elsevier Inc. All rights reserved.)
