A magnetization mapping approach for passive shim design in MRI

Sanchez Lopez, H, Liu, F, Trakic, A. and Crozier, S (2006). A magnetization mapping approach for passive shim design in MRI. In: A. Dhawan, Proceedings of the 28th Annual IEEE Engineering in Medicine and Biology Society Annual International Conference. 28th Annual International Conference IEEE Engineering in Medicine and Biology Society, New York, USA, (1893-1896). 30 August - 3 September, 2006.


Author Sanchez Lopez, H
Liu, F
Trakic, A.
Crozier, S
Title of paper A magnetization mapping approach for passive shim design in MRI
Conference name 28th Annual International Conference IEEE Engineering in Medicine and Biology Society
Conference location New York, USA
Conference dates 30 August - 3 September, 2006
Proceedings title Proceedings of the 28th Annual IEEE Engineering in Medicine and Biology Society Annual International Conference   Check publisher's open access policy
Place of Publication USA
Publisher IEEE
Publication Year 2006
Sub-type Fully published paper
DOI 10.1109/IEMBS.2006.259480
ISSN 1557-170X
Editor A. Dhawan
Volume 1
Issue 1
Start page 1893
End page 1896
Total pages 4
Collection year 2006
Language eng
Abstract/Summary A new passive shim design method is presented which is based on a magnetization mapping approach. Well defined regions with similar magnetization values define the optimal number of passive shims, their shape and position. The new design method is applied in a shimming process without prior-axial shim localization; this reduces the possibility of introducing new errors. The new shim design methodology reduces the number of iterations and the quantity of material required to shim a magnet. Only a few iterations (1-5) are required to shim a whole body horizontal bore magnet with a manufacturing error tolerance larger than 0.1 mm and smaller than 0.5 mm. One numerical example is presented
Subjects E1
291500 Biomedical Engineering
671402 Medical instrumentation
0903 Biomedical Engineering
Keyword Design engineering
Magnetisation
Magnets
Manufacturing processes
Shims
Q-Index Code E1

 
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Created: Thu, 23 Aug 2007, 22:16:34 EST