MRI system with dynamic receiver gain

Details MRI system with dynamic receiver gain MRI system with dynamic receiver gain

1993-10-18

1995-09-19

Arana, Louis M.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324314, G01V 300

Patent

active

054518768

ABSTRACT:
An NMR system includes a transceiver which receives NMR signals of varying amplitude during a scan. The gain of the receiver is dynamically changed during the scan to provide an optimal SNR figure without overranging the transceiver's A/D converter. The acquired NMR signals are normalized prior to image reconstruction using correction factors for gain and phase stored in a normalization table.

REFERENCES:
patent: 4700138 (1987-10-01), Shimazaki et al.
patent: 4806866 (1989-02-01), Maier
Effective Dynamic Range Improvement of NMR Signal Detection by Using Analog Programmable Attenuators, C. H. Oh, et al., SMRM Eighth Annual Meeting, (1989), p. 181.

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