Title :
Finite element analysis of gradient coil deformation and vibration in NMR microscopy
Author :
Chu, W.C. ; Ahn, C.B. ; Bavarian, B. ; Mourad, Sherif A. ; Jacobs, Russell E.
Author_Institution :
California Univ., Irvine, CA, USA
fDate :
9/1/1992 12:00:00 AM
Abstract :
Resolution degradation due to gradient coil deformation and vibration in NMR microscopy is investigated using finite element analysis. From the analysis, deformations due to the Lorentz force can be as large as 1-10 μm depending on the gradient strength and coil frame material. Thus, these deformations can be one of the major resolution limiting factors in NMR microscopy. Coil vibration, which depends on the input current waveform and resolution degradation due to time-variant deformation and time-invariant deformation are investigated by numerical simulations
Keywords :
coils; finite element analysis; nuclear magnetic resonance imaging; vibrations; Lorentz force; NMR microscopy; gradient coil deformation; input current waveform; numerical simulations; resolution degradation; vibration; Capacitive sensors; Coils; Degradation; Finite element methods; Image resolution; Jacobian matrices; Magnetic fields; Microscopy; Nuclear magnetic resonance; Stress;
Journal_Title :
Medical Imaging, IEEE Transactions on
