Compressed sensing based simultaneous black- and gray-blood carotid vessel wall MR imaging |
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| Institution: | 1. Center Laboratory, The First Hospital of Nanchang City, 330008 Nanchang, PR China;2. Department of Radiology, The Third Affiliated Hospital of Nanchang University, 330008 Nanchang, PR China;3. Department of Radiology, University of Cambridge, CB2 0QQ Cambridge, UK;4. Academy for Advanced Interdisciplinary Studies, Peking University, 100871 Beijing, PR China;5. Department of Radiology, Beijing Anzhen Hospital, Capital Medical University, 100029 Beijing, PR China;6. College of Engineering, Peking University, 100871 Beijing, PR China;1. Computational BioMedicine Laboratory, FORTH-ICS, Heraklion, Crete, Greece;2. Department of Medical Physics, University of Crete, Heraklion, Crete, Greece;3. Department of Radiology, University of Crete, Heraklion, Greece;1. Magnetic Resonance Imaging Laboratory, Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South Korea;2. Department of Electrical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, South Korea;1. Department of Orthopaedic Surgery, University of Kansas School of Medicine—Wichita, Wichita, Kansas, USA;2. Department of Biological Sciences, Wichita State University, Wichita, KS, USA;1. Department of Diagnostic Radiology and Nuclear Medicine, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan;2. Department of Oral and Maxillofacial Radiology, Tokyo Medical and Dental University, Tokyo, Japan;3. Okinawa Institute of Science and Technology Graduate University, Okinawa, Japan;4. Department of Comprehensive Reproductive Medicine, Tokyo Medical and Dental University, Tokyo, Japan;5. Department of Colorectal Surgery, Tokyo Medical and Dental University, Tokyo, Japan;6. Department of Pathology, Tokyo Medical and Dental University, Tokyo, Japan;1. University of Groningen, University Medical Center Groningen, Center for Medical Imaging - North East Netherlands, EB44, PO Box 30001, 9700, RB, Groningen, The Netherlands;2. University of Groningen, University Medical Center Groningen, Department of Radiology, EB44, PO Box 30001, 9700, RB, Groningen, The Netherlands |
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| Abstract: | ObjectiveIn this study, we sought to demonstrate the blood suppression performance, image quality and morphological measurements for compressed sensing (CS) based simultaneous 3D black- and gray-blood imaging sequence (CS-siBLAG) in carotid vessel wall MR imaging.Materials and methodsSeven healthy volunteers and five patients were recruited. Healthy subjects underwent five CS-siBLAG scans with 1, 2, 3, 4 and 5-fold accelerations. Signal-to-tissue ratio (STR) and contrast-to-tissue ratio (CTR) were computed as the measures of flowing signal suppression performance and the image quality for black-blood imaging of the technique. Vessel lumen area (LA) and wall area (WA) were compared between fully sampled acquisition and each accelerated acquisition. Patients underwent three CS-siBLAG scans with 1, 3 and 5-fold accelerations as well as a 3D time of flight (3D TOF) scan. Two radiologists reviewed the under-sampled black- and gray-blood image quality.ResultsSTR and CTR values obtained with 2 to 5-fold accelerations were not significantly different from those with full acquisition. LA and WA measured at 2 ×, 3 ×, 4 × and 5 × were all highly correlated to the corresponding values at 1 ×. For patients imaging, two radiologists both found that the dual-contrast images at 3 × acceleration exhibited comparable image quality to that of the fully sampled acquisition, and that the images at 5 × exhibited slightly blurred vessel wall and outer vessel wall boundaries.ConclusionBy combining the CS under-sampling pattern and reconstruction, pseudo-centric phase encoding order and dual blood contrast sequences, this technique provides spatially registered black- and gray-blood images and excellent visualization for vessel wall imaging and gray-blood imaging in a short scan time. |
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