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

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.