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A cylindrical basis set for shim coil design in magnetic resonance imaging
Citation
Phair, A and Brideson, M and Forbes, LK, A cylindrical basis set for shim coil design in magnetic resonance imaging, Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering Article e21400. ISSN 1552-5031 (2018) [Refereed Article]
Copyright Statement
© 2018 Wiley Periodicals, Inc.
Abstract
Shim coils used in magnetic resonance imaging and NMR to produce magnetic fields are commonly designed to generate spherical harmonics, and thus achieve accuracy over a spherical region. Herein a cylindrical basis set is presented as an alternative to spherical harmonics, so as to better suit the cylindrical coil geometry and, in cases where it more closely matches a cylinder, the imaging region of interest. Example coil winding patterns for a selection of functions in this new set are derived using the target field method. A computational approach is taken to determine their accuracy, and it is found the basis functions are generated with high accuracy over cylindrical imaging regions within the coil. The basis set is also applied to a double-coil configuration with active shielding, which results in slightly reduced accuracy within the coil but highly effective field nullification beyond the coil radius.
Item Details
Item Type: | Refereed Article |
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Keywords: | cylindrical basis, shim coil design, target field method, MRI |
Research Division: | Engineering |
Research Group: | Biomedical engineering |
Research Field: | Medical devices |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the mathematical sciences |
UTAS Author: | Phair, A (Mr Andrew Phair) |
UTAS Author: | Brideson, M (Dr Michael Brideson) |
UTAS Author: | Forbes, LK (Professor Larry Forbes) |
ID Code: | 130168 |
Year Published: | 2018 |
Web of Science® Times Cited: | 4 |
Deposited By: | Mathematics and Physics |
Deposited On: | 2019-01-14 |
Last Modified: | 2019-03-21 |
Downloads: | 0 |
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