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Contrast-Enhanced High-Resolution Intracranial Vessel Wall MRI with Compressed Sensing: Comparison with Conventional T1 Volumetric Isotropic Turbo Spin Echo Acquisition Sequence

Korean Journal of Radiology 2020년 21권 12호 p.1334 ~ 1344
박채정, 차지훈, 안성수, 최현석, 김영대, 남효석, 허지회, 이승구,
소속 상세정보
박채정 ( Park Chae-Jung ) - Yonsei University College of Medicine Department of Radiology
차지훈 ( Cha Ji-Hoon ) - Yonsei University College of Medicine Department of Radiology
안성수 ( Ahn Sung-Soo ) - Yonsei University College of Medicine Department of Radiology
최현석 ( Choi Hyun-Seok ) - Yonsei University College of Medicine Department of Radiology
김영대 ( Kim Young-Dae ) - Yonsei University College of Medicine Department of Neurology
남효석 ( Nam Hyo-Suk ) - Yonsei University College of Medicine Department of Neurology
허지회 ( Heo Ji-Hoe ) - Yonsei University College of Medicine Department of Neurology
이승구 ( Lee Seung-Koo ) - Yonsei University College of Medicine Department of Radiology

Abstract


Objective: Compressed sensing (CS) has gained wide interest since it accelerates MRI acquisition. We aimed to compare the 3D post-contrast T1-weighted volumetric isotropic turbo spin echo acquisition (VISTA) with CS (VISTA-CS) and without CS (VISTA-nonCS) in intracranial vessel wall MRIs (VW-MRI).

Materials and Methods: From April 2017 to July 2018, 72 patients who underwent VW-MRI, including both VISTA-CS and VISTA-nonCS, were retrospectively enrolled. Wall and lumen volumes, signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR) were measured from normal and lesion sites. Two neuroradiologists independently evaluated overall image quality and degree of normal and lesion wall delineation with a four-point scale (scores ≥ 3 defined as acceptable).

Results: Scan coverage was increased in VISTA-CS to cover both anterior and posterior circulations with a slightly shorter scan time compared to VISTA-nonCS (approximately 7 minutes vs. 8 minutes). Wall and lumen volumes were not significantly different with VISTA-CS or VISTA-nonCS (interclass correlation coefficient = 0.964?0.997). SNR was or trended towards significantly higher values in VISTA-CS than in VISTA-nonCS. At normal sites, CNR was not significantly different between two sequences (p = 0.907), whereas VISTA-CS provided lower CNR in lesion sites compared with VISTA-nonCS (p = 0.003). Subjective wall delineation was superior with VISTA-nonCS than with VISTA-CS (p = 0.019), although overall image quality did not differ (p = 0.297). The proportions of images with acceptable quality were not significantly different between VISTA-CS (83.3?97.8%) and VISTA-nonCS (75?100%).

Conclusion: CS may be useful for intracranial VW-MRI as it allows for larger scan coverage with slightly shorter scan time without compromising image quality.

키워드

Magnetic resonance imaging; Blood vessels; Diagnostic imaging; Signal-to-noise ratio; Acceleration

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