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Development of a temperature-variable magnetic resonance imaging system using a 1.0 T yokeless permanent magnet
Ist Teil von
Journal of magnetic resonance (1997), 2011-10, Vol.212 (2), p.355-361
Ort / Verlag
Elsevier Inc
Erscheinungsjahr
2011
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
[Display omitted]
► A temperature-variable MRI system using a permanent magnet has been developed. ► The whole detection system was placed in a thermostatic bath. ► The magnetic field inhomogeneity was measured as a function of temperature. ► The inhomogeneity was corrected using a single-channel shim coil.
A temperature variable magnetic resonance imaging (MRI) system has been developed using a 1.0
T permanent magnet. A permanent magnet, gradient coils, radiofrequency coil, and shim coil were installed in a temperature variable thermostatic bath. First, the variation in the magnetic field inhomogeneity with temperature was measured. The inhomogeneity has a specific spatial symmetry, which scales linearly with temperature, and a single-channel shim coil was designed to compensate for the inhomogeneity. The inhomogeneity was drastically reduced by shimming over a wide range of temperature from −5
°C to 45
°C. MR images of an okra pod acquired at different temperatures demonstrated the high potential of the system for visualizing thermally sensitive properties.