Design of three axis bi-planar surface mount gradient coils for Magnetic Resonance Imaging device.
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Journal Title
Journal ISSN
Volume Title
Sähkötekniikan korkeakoulu |
Master's thesis
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Author
Date
2020-10-19
Department
Major/Subject
Electrical Power and Energy Engineering
Mcode
ELEC3024
Degree programme
AEE - Master’s Programme in Automation and Electrical Engineering (TS2013)
Language
en
Pages
33+6
Series
Abstract
Building very low field strength and an open patient access MRI device is the project goal. In pre-gradient coil design construction phase, permanent magnet is chosen as static magnetic field source and modeled as two pole open patient access structure. To support this structure gradient coils needed to be bi-planar and surface mountable. By applying Biot-Savart law for an infinite current carrying straight coil a pattern between magnetic field and the distance between calculated point to the wire is identified. Utilizing particular pattern and through COMSOL simulation software’s parametric sweep function the best gradient characteristic delivering coil geometry is defined and chosen as the design for the x and y-gradient coil. Maxwell pair is used to produce z-gradient in conventional devices; it is also used in this design. The designed three axis gradient coils are modelled to the previous design and integrated in the previous design model and the superposition of the results are analyzed. Some further issues related to the improvement of the design are also proposed.Description
Supervisor
Laakso, IlkkaThesis advisor
Belahcen, AnouarPalva, Lauri
Keywords
MRI, gradient coils, Bi-planar, magnetic resonance imaging
