Comparison of analog and digital transceiver systems for magnetic resonance imaging

Analog and digital transceivers for MRI systems were critically evaluated under identical experimental conditions. The MRI experiments were performed using a 4.74-Tesla vertical-bore superconducting magnet and a high-sensitivity gradient coil probe. 3D spin-echo images of a kumquat were acquired with and without using a gain-stepping scan technique to extend the dynamic range of the receiver systems. The acquired MR images clearly demonstrated that nearly identical image quality was obtained for both transceiver systems, but DC and ghosting artifacts were obtained for the analog transceiver. We therefore concluded that digital transceivers have several advantages over the analog transceivers.

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