Details

Autor(en) / Beteiligte

• Terada, Y.
• Tamada, D.
• Kose, K.

Titel

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.