MR imaging of hand and wrist with a dedicated 0.1-T low-field imaging system.
We describe the first results of a new magnetic resonance imaging (MRI) system specially developed for hand and wrist imaging. The system uses a small resistive water-cooled magnet with a vertical magnetic field of 0.1 T in an air gap of 15 cm. The console is based on a microcomputer with a vector signal processor and an image-processing board. There is actually no Faraday cage. For the whole hand, the in-plane spatial resolution is less than 1 mm in the 128 x 128-pixels format for typical slice thicknesses of 3 to 5 mm. Solenoidal volume coils for fingers were developed, giving, in the same matrix format, an in-plane high spatial resolution of 0.22 mm for a typical slice thickness of 3 mm.
Gries
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P
Laboratoire de Biomécanique, CHU Hautepierre, Strasbourg, France.
Constantinesco
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A
Brunot
B
B
Facello
A
A
D006225:Hand / Q000033:anatomy & histology*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D008838:Microcomputers; D014953:Wrist / Q000033:anatomy & histology*