A fast screening protocol for carotid plaques imaging using 3D multi-contrast MRI without contrast agent |
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| Institution: | 1. Lauterbur Research Center for Biomedical Imaging, Shenzhen Institutes of Advanced Technology of Chinese Academy of Sciences, Shenzhen Key Laboratory for MRI, Shenzhen, China;2. Biomedical Imaging Research Institute, Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, United States;3. Department of Neurology, Peking University Shenzhen Hospital, Shenzhen, China;1. Institute of Imaging Science, Vanderbilt University, Nashville, TN, USA;2. Department of Radiology and Radiological Sciences, Vanderbilt University, Nashville, TN, USA;3. Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, CA, USA;4. UCSF/UC Berkeley Joint Graduate Group in Bioengineering, San Francisco, CA, USA;5. Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA;1. Department of Radiology, Weill Cornell Medical College, New York, NY, United States;2. Department of Neurology, Weill Cornell Medical College, New York, NY, United States;1. School of Electronic Engineering, Jilin University, Changchun, Jilin, China;2. Department of Radiology, Provincial Hospital of Fujian Province, Teaching Hospital of Fujian Medical University, Fuzhou, China;3. Department of Radiology, University of Pennsylvania, Philadelphia 19104, USA;4. School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, China;1. Department of Medicine, Section of Cardiology, The University of Chicago, Chicago, IL, United States;2. Department of Surgery, Section of Cardiothoracic Surgery, The University of Chicago, Chicago, IL, United States;3. Department of Radiology, The University of Chicago, Chicago, IL, United States;4. Philips, Gainesville, FL, United States.;1. Department of Radiation Sciences, Umeå University, Umeå, Sweden;2. Department of Radiology, Uppsala University Hospital, Uppsala, Sweden;3. Applied Science Laboratory, GE Healthcare, Uppsala, Sweden |
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| Abstract: | PurposeTo implement a fast (~ 15 min) MRI protocol for carotid plaque screening using 3D multi-contrast MRI sequences without contrast agent on a 3 Tesla MRI scanner.Materials and methods7 healthy volunteers and 25 patients with clinically confirmed transient ischemic attack or suspected cerebrovascular ischemia were included in this study. The proposed protocol, including 3D T1-weighted and T2-weighted SPACE (variable-flip-angle 3D turbo spin echo), and T1-weighted magnetization prepared rapid acquisition gradient echo (MPRAGE) was performed first and was followed by 2D T1-weighted and T2-weighted turbo spin echo, and post-contrast T1-weighted SPACE sequences. Image quality, number of plaques, and vessel wall thicknesses measured at the intersection of the plaques were evaluated and compared between sequences.ResultsAverage examination time of the proposed protocol was 14.6 min. The average image quality scores of 3D T1-weighted, T2-weighted SPACE, and T1-weighted magnetization prepared rapid acquisition gradient echo were 3.69, 3.75, and 3.48, respectively. There was no significant difference in detecting the number of plaques and vulnerable plaques using pre-contrast 3D images with or without post-contrast T1-weighted SPACE. The 3D SPACE and 2D turbo spin echo sequences had excellent agreement (R = 0.96 for T1-weighted and 0.98 for T2-weighted, p < 0.001) regarding vessel wall thickness measurements.ConclusionThe proposed protocol demonstrated the feasibility of attaining carotid plaque screening within a 15-minute scan, which provided sufficient anatomical coverage and critical diagnostic information. This protocol offers the potential for rapid and reliable screening for carotid plaques without contrast agent. |
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