Three-Line Microstrip Array for Whole-Body MRI System at 7 T
- Authors
- Hernandez, Daniel
- Issue Date
- Jan-2021
- Publisher
- MDPI
- Keywords
- Full‐body MRI; MRI; RF transmitter; Three‐line microstrip array
- Citation
- APPLIED SCIENCES-BASEL, v.11, no.1, pp.1 - 11
- Journal Title
- APPLIED SCIENCES-BASEL
- Volume
- 11
- Number
- 1
- Start Page
- 1
- End Page
- 11
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/79814
- DOI
- 10.3390/app11010073
- ISSN
- 2076-3417
- Abstract
- This paper proposes the use of a triple‐line microstrip array for transmitting a magnetic field (|B1+|) into the whole body for magnetic resonance applications at ultra‐high field strength, such as 7 T. We explored some technologies that can potentially be applied for whole‐body 7 T magnetic resonance imaging, as there is ongoing research on this topic. The triple‐line microstrip transmission line (t‐MTL) array consists of 32 channels. Each channel has a t‐MTL, comprising a main conductor line and two adjacent coupled lines. The adjacent lines are not connected directly to the source. This configuration resulted in increased intensity and a centered |B1+|‐field. We compared the proposed structure and some reference radiofrequency (RF) transmitters, such as a patch antenna, using a magnet bore as a waveguide and a whole‐body birdcage coil. We evaluated the performance of the t‐MTL using cylindrical phantoms. We computed the |B1+ |‐field from each RF transmitter inside a 3D human model containing more than 200 tissues. We compared their uniformity and field intensity and proposed a t‐MTL array that yielded better performance. The proposed design also showed a lower specific absorption rate compared with a patch antenna. © 2020 by the author. Licensee MDPI, Basel, Switzerland.
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