Abstract #4286

Comparison of single-loop endoluminal receiver coils based on serial or parallel active decoupling circuits using controllable MEMS switches

HAMZA RAKI^1,2, ISABELLE SANIOUR¹, FRASER ROBB³, KEVIN TSE VE KOON¹, HENRI SOUCHAY², SIMON A. LAMBERT¹, and OLIVIER BEUF¹

¹Univ. Lyon, INSA-Lyon, Université Claude Bernard Lyon 1, UJM-Saint Etienne, CNRS, Inserm, CREATIS UMR 5220, U1206, F-69000, LYON, France, ²General Electric Healthcare, Buc, France, ³General Electric Healthcare, Aurora, OH, United States

Two prototypes of single-loop endoluminal receiver coils integrating serial and parallel active decoupling circuits using controllable MEMS switches were built and compared to a reference coil with PIN-diode circuit. Parallel MEMS coil had a significantly higher quality factor compared to the serial MEMS coil and the reference coil. The switching delays of both MEMS coils were about few microseconds (< 8µs). The characterization on 3.0T MRI system showed comparable signal intensity distribution for the different coil configurations.

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