System and method for direct digitization of NMR signals

Details System and method for direct digitization of NMR signals System and method for direct digitization of NMR signals

2007-03-23

2010-10-05

Warden, Jill (Department: 1797)

Chemistry: analytical and immunological testing

Nuclear magnetic resonance, electron spin resonance or other...

C600S410000, C324S307000

Reexamination Certificate

active

07807474

ABSTRACT:
A magnetic resonance imaging (MRI) system includes a transmitter that produces an RF excitation pulse that is applied to a subject positioned in the MRI system to induce emission of at least one of an NMR signal and an ESR signal therefrom, and that produces a reference signal indicative of the phase of the RF excitation pulse. A first analog-to-digital converter has an input for receiving the reference signal that is synchronous with the RF excitation pulse. One or more additional analog-to-digital converters/processors have inputs for receiving the at least one of NMR signals and ESR signals produced by a subject placed in the MRI system and produce one or more complex digital signals therefrom. A normalizer is connected to receive and normalize the digital reference signal and a mixer is connected to receive the normalized digital reference signal and the digital signal. Accordingly, the mixer is operable to multiply the normalized complex digital reference signal with the complex digital signal.

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