| 摘要 |
Embodiments of the invention relate to methods and apparatus for lossless, or low loss, coupling for many channel RF coil arrays. Non-invertible noise can be converted to invertible noise. Specific embodiments pertain to methods and apparatus for magnetic resonance imaging (MRI) with many channel RF coil arrays. Specific embodiments pertain to methods and apparatus for matching at least two preamplifiers to an associated coils in an MRI array and tuning the MRI coil array, wherein one of the preamplifiers is power mismatched as in conventional preamplifier decoupling while another preamplifier has low imput impedance at the coil terminals and is used as a current sensing preamplifier. |
