caa a22 4500 605546142 CHVBK 20210128100939.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s00723-015-0656-5 doi (NATIONALLICENCE)springer-10.1007/s00723-015-0656-5 Hybrid Monopole/Loop Coil Array for Human Head MR Imaging at 7T [Elektronische Daten] [Xinqiang Yan, Long Wei, Rong Xue, Xiaoliang Zhang] The monopole coil and loop coil have orthogonal radiofrequency (RF) fields and thus are intrinsically decoupled electromagnetically if they are laid out appropriately. In this study, we proposed a hybrid monopole/loop technique which could combine the advantages of both loop arrays and monopole arrays. To investigate this technique, a hybrid RF coil array containing four monopole channels and four loop channels was developed for human head magnetic resonance (MR) imaging at 7T. In vivo MR imaging and g-factor results using monopole-only channels, loop-only channels and all channels of the hybrid array were acquired and evaluated. Compared with the monopole-only and loop-only channels, the proposed hybrid array hasthe higher signal-to-noise ratio (SNR) and better parallel imaging performance. Sufficient electromagnetic decoupling and diverse RF magnetic field (B1) distributions of monopole channels and loop channels may contribute to this performance improvement. From experimental results, the hybrid monopole/loop array has low g-factor and excellent SNR at both periphery and center of the brain, which is valuable for human head imaging at ultrahigh fields. Springer-Verlag Wien, 2015 Yan Xinqiang Key Laboratory of Nuclear Radiation and Nuclear Energy Technology, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Shijingshan District, 100049, Beijing, China aut Wei Long Key Laboratory of Nuclear Radiation and Nuclear Energy Technology, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Shijingshan District, 100049, Beijing, China aut Xue Rong State Key Laboratory of Brain and Cognitive Science, Beijing MRI Center for Brain Research, Institute of Biophysics, Chinese Academy of Sciences, 100101, Beijing, China aut Zhang Xiaoliang Department of Radiology and Biomedical Imaging, University of California San Francisco, Byers Hall, Room 102, 1700 4th St, 94158-2330, San Francisco, CA, USA aut Applied Magnetic Resonance Springer Vienna 46/5(2015-05-01), 541-550 0937-9347 46:5<541 2015 46 723 https://doi.org/10.1007/s00723-015-0656-5 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00723-015-0656-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yan Xinqiang Key Laboratory of Nuclear Radiation and Nuclear Energy Technology, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Shijingshan District, 100049, Beijing, China aut NATIONALLICENCE 700 1- Wei Long Key Laboratory of Nuclear Radiation and Nuclear Energy Technology, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Shijingshan District, 100049, Beijing, China aut NATIONALLICENCE 700 1- Xue Rong State Key Laboratory of Brain and Cognitive Science, Beijing MRI Center for Brain Research, Institute of Biophysics, Chinese Academy of Sciences, 100101, Beijing, China aut NATIONALLICENCE 700 1- Zhang Xiaoliang Department of Radiology and Biomedical Imaging, University of California San Francisco, Byers Hall, Room 102, 1700 4th St, 94158-2330, San Francisco, CA, USA aut NATIONALLICENCE 773 0- Applied Magnetic Resonance Springer Vienna 46/5(2015-05-01), 541-550 0937-9347 46:5<541 2015 46 723