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A novel multi-segment surface coil for neuro-functional magnetic resonance imaging

โœ Scribed by Chin-Shoou Lin; Sundar S. Rajan; Jonathan Gold

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
589 KB
Volume
39
Category
Article
ISSN
0740-3194

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โœฆ Synopsis

The construction of two novel mult-segment (MS) resonators are described. The signal-to-noise ratio (SNR) and B1 homogeneity of the coils are compared with that of a surface coil and a standard quadrature head coil. The images obtained with the MS designs revealed a surface coil-like fall-off in signal with depth. The SNR offered by MS coils was found to be better than the head coil at depths less than approximately 6 cm. Bilateral motor cortex activation on normal subjects performing finger tapping tasks is demonstrated.

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## Abstract As the static magnetic field strength used in human magnetic resonance imaging increases, the wavelength of the corresponding radiofrequency field becomes comparable to the dimensions of the coil and volume of interest. The dielectric resonance effects that arise in this full wavelength