Automatic gain control apparatus for NMR imaging system

Details Automatic gain control apparatus for NMR imaging system Automatic gain control apparatus for NMR imaging system

1986-06-12

1987-10-13

Levy, Stewart J.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324313, G01R 3320

Patent

active

047001380

ABSTRACT:
In measuring a number of echo signal, which normally attenuate chronologically, in a single pulse sequence, such as in multi-echo method or a multi-slice method, each echo signal is received and suitably amplified by a reception amplifier having predetermined levels of gain for different time periods during which the successive echo signals are processed such that the echo signals received at a data collection unit are all of substantially the same amplitude regardless of where they appear in the time sequence. The predetermined levels of gains are obtained by false scanning prior to actual image scanning and calculation and storing in a memory. As a result, the echo signals can be received within a dynamic range which is smaller than using the conventional system.

REFERENCES:
patent: 4070708 (1978-01-01), Smallcombe et al.

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