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Abstract #2026

A Low Input Impedance MRI Preamplifier Using a Purely Capacitive Feedback Network

Oppelt R, Vester M
Siemens AG

A novel MRI preamplifier is presented which achieves a low input impedance without a bulky high-Q input inductor while maintaining a high equivalent noise input resistance. This allows a significant reduction in size and makes the preamp highly suitable for multi channel loop arrays. The low input impedance which is essential for channel decoupling is achieved over a very large bandwidth so that tuning is strongly simplified.