Intracranial microvascular imaging at 7 T MRI with transceiver RF coils
- Authors
- Kang, Chang-Ki; Woo, Myung-Kyun; Hong, Suk-Min; Kim, Young-Bo; Cho, Zang-Hee
- Issue Date
- Nov-2014
- Publisher
- ELSEVIER SCIENCE INC
- Keywords
- 7 T MRI; MRA; Microvascular imaging; Multi-channel RF coil; Parallel imaging
- Citation
- MAGNETIC RESONANCE IMAGING, v.32, no.9, pp.1133 - 1138
- Journal Title
- MAGNETIC RESONANCE IMAGING
- Volume
- 32
- Number
- 9
- Start Page
- 1133
- End Page
- 1138
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/12119
- DOI
- 10.1016/j.mri.2014.07.006
- ISSN
- 0730-725X
- Abstract
- Purpose: To investigate intracranial microvascular images with transceiver radio-frequency (RF) coils at ultra-high field 7 T magnetic resonance imaging (MRI). Materials and methods: We designed several types of RF coils for the study of 7 T magnetic resonance angiography and analyzed quantitatively each coil's performance in terms of the signal-to-noise ratio (SNR) profiles to evaluate the usefulness of RF coils for microvascular imaging applications. We also obtained the microvascular images with different resolutions and parallel imaging technique. Results: The overlapped 6-channel (ch) transceiver coil exhibited the highest performance for angiographic imaging. Although other multi-channel coils, such as 4- or 8-ch, were also suitable for fast imaging, these coils performed poorly in homogeneity or SNR for angiographic imaging. Furthermore, the 8-ch coil was poor in SNR at the center of the brain, while it had the highest SNR at the periphery. Conclusion: The present study has demonstrated that the overlapped 6-ch coil with large-size loop coils provided the best performance for microvascular imaging or angiography with the ultra-high-field 7 T MRI, mainly because of its long penetration depth together with high SNR. (C) 2014 Elsevier Inc. All rights reserved.
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Collections - 의과대학 > 의학과 > 1. Journal Articles
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