Development of custom-made RF coil for magnetic resonance velocimeter with a high spatial resolution
- Authors
- Yang, Byungkuen; Cho, Jee-Hyun; Lee, Jeesoo; Song, Simon
- Issue Date
- Apr-2019
- Publisher
- KOREAN SOC MECHANICAL ENGINEERS
- Keywords
- Custom-made RF coil; High spatial resolution; Magnetic resonance velocimetry; Wall shear stress
- Citation
- JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY, v.33, no.4, pp.1681 - 1688
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
- Volume
- 33
- Number
- 4
- Start Page
- 1681
- End Page
- 1688
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/14259
- DOI
- 10.1007/s12206-019-0320-3
- ISSN
- 1738-494X
- Abstract
- Magnetic resonance velocimetry (MRV) is a versatile flow visualization technique that is used to measure three-component velocity vectors in a 3D space. However, the spatial resolution of MRV is relatively poor in comparison with optical flow visualization techniques, thereby limiting its applicability to small-scale flows and wall shear stress (WSS) estimation. Thus, we built a solenoid RF coil and evaluated its performance in terms of spatial resolution improvement by measuring the laminar flow in a circular tubing. The coil was developed for a 4.7 Tesla MRI system and for tightly wrapping a flow tubing with an inner diameter of 2 mm. The custom-made RF coil could precisely capture the velocity vectors in a voxel that was 11 times smaller than a commercial coil at the same SNR. Therefore, the WSS errors estimated using the custom-made and commercial coils were 8.5 % and 42.3 %, respectively.
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