Abstract

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 network and preamplifier noise. Arrays of composite coils are shown to provide higher SNR than surface coil arrays at depth in the phantom as the number of elements increases.

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