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The array configuration that maximizes the SNR in magnetic resonance imaging depends on the number and arrangement of RF coil elements. A comparison of composite coils (a surface coil in combination with two upright coils) and surface coils in arrays with 18, 36, and 54 elements is presented at 128 MHz. Realistic multi-port noise modeling shows that the combined SNR can depend strongly on matching...
The role of capacitive coupling in MRI RF coils has not been studied extensively largely because of the lack of comprehensive models in the literature. At higher MRI frequencies capacitive coupling greatly impacts coil coupling and therefore cannot be neglected. We provide a model that takes into account the distributed nature of the mutual and series capacitance on coils. It correctly predicts impedance...
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