DocumentCode :
1102397
Title :
Three-Dimensional Gradient Coil Structures for Magnetic Resonance Imaging Designed Using Fuzzy Membership Functions
Author :
Sanchez, H. ; Liu, F. ; Trakic, A. ; Weber, E. ; Crozier, S.
Author_Institution :
Queensland Unic., Brisbane
Volume :
43
Issue :
9
fYear :
2007
Firstpage :
3558
Lastpage :
3566
Abstract :
The design of high-performance gradient coils is essential for modern magnetic resonance imaging (MRI) applications. This work presents a new and alternative design methodology that explores three-dimensional (3-D) solution space by combining fuzzy membership functions to model and reshape the coil structure, given the magnetic field and electrical and mechanical constraints. The approach includes a stream function generator, a 3-D coil structure generator, and the evaluation of an objective function. An unconventional stream function for asymmetric transverse gradient coils is defined in terms of fuzzy sets. The method was applied to design a short, unshielded asymmetric gradient coil for breast imaging. The resulting dome-shape coil has superior gradient performance compared to a standard fingerprint coil. New quadrupolar gradient coil designs for breast imaging can also be obtained with the proposed method. The paper concludes with a study of the influence of a number of design parameters on the coil performance.
Keywords :
biomedical MRI; coils; fuzzy systems; 3D coil structure generator; asymmetric transverse gradient coils; breast imaging; fingerprint coil; fuzzy membership functions; magnetic resonance imaging; quadrupolar gradient coil designs; stream function generator; three-dimensional gradient coil structures; Breast; Coils; Design methodology; Geometry; Information technology; Magnetic field measurement; Magnetic fields; Magnetic resonance imaging; Space exploration; Streaming media; Fuzzy set; gradient coil design; magnetic resonance imaging (MRI); stream function;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2007.902065
Filename :
4292316
Link To Document :
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