An improved asymmetric gradient coil design for high-resolution MRI head imaging

Tang, Fangfang , Liu, Feng, Freschi, Fabio, Li, Yu, Repetto, Maurizio, Giaccone, Luca, Wang, Yaohui and Crozier, Stuart  (2016) An improved asymmetric gradient coil design for high-resolution MRI head imaging. Physics in Medicine and Biology, 61 24: 8875-8889. doi:10.1088/1361-6560/61/24/8875

Author Tang, Fangfang 
Liu, Feng
Freschi, Fabio
Li, Yu
Repetto, Maurizio
Giaccone, Luca
Wang, Yaohui
Crozier, Stuart 
Title An improved asymmetric gradient coil design for high-resolution MRI head imaging
Journal name Physics in Medicine and Biology   Check publisher's open access policy
ISSN 1361-6560
Publication date 2016-12-21
Sub-type Article (original research)
DOI 10.1088/1361-6560/61/24/8875
Open Access Status Not yet assessed
Volume 61
Issue 24
Start page 8875
End page 8889
Total pages 15
Place of publication Bristol, United Kingdom
Publisher Institute of Physics Publishing
Language eng
Subject 3614 Radiological and Ultrasound Technology
2741 Radiology Nuclear Medicine and imaging
Abstract For head magnetic resonance imaging, local gradient coils are often used to achieve high solution images. To accommodate the human head and shoulder, the head gradient coils are usually designed in an asymmetric configuration, allowing the region-of-uniformity (ROU) close to the coil's patient end. However, the asymmetric configuration leads to technical difficulties in maintaining a high gradient performance for the insertable head coil with very limited space. In this work, we present a practical design configuration of an asymmetric insertable gradient head coil offering an improved performance. In the proposed design, at the patient end, the primary and secondary coils are connected using an additional radial surface, thus allowing the coil conductors distributed on the flange to ensure an improvement in the coil performance. At the service end, the primary and shielding coils are not connected, to permit access to shim trays, cooling system piping, cabling, and so on. The new designs are compared with conventional coil configurations and the simulation results show that, with a similar field quality in the ROU, the proposed coil pattern has improved construction characteristics (open service end, well-distributed wire pattern) and offers a better coil performance (lower inductance, higher efficiency, etc) than conventional head coil configurations.
Keyword Asymmetric configuration
Gradient coil design
Insertable head coil
Magnetic resonance imaging
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
School of Information Technology and Electrical Engineering Publications
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