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Reconfigurable RF receiver using compact distributed switch matrix for array coils

Reconfigurable RF receiver using compact distributed switch matrix for array coils

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Magnetic resonance (MR) signals captured by RF array coils should be delivered to analogue-to-digital converter (ADC) channels through an independent receiver (Rx) circuitry for precise MRI process. Since different types of RF coils should be utilised by a fixed port configuration on a patient table with a limited number of ADC channels, a highly flexible Rx front-end design is necessary. In this Letter, a compact distributed switch matrix structure for multi-channel RF coil Rx is proposed for supporting different types of array coils with small circuit size and sufficient reconfigurability. The proposed structure is configured by a multiple number of unit matrix cells consisting of a single double pole double throw and two single pole double throw RF switches to control the pathways of received MR signals. The proposed structure was implemented and verified at 9.4-Tesla (9.4 T) MR frequency (400 MHz) by comparing different RF path losses.


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      • 4. Kröckel, H.: ‘Switching matrix with two control inputs at each switching element’. US Patent 7684427, March 2010.
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      • 6. Ghon, H.-S.: ‘Method and apparatus for acquiring image in magnetic resonance imaging system’. US Application, 20140159719A1, June 2014.

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