Adaptive dynamic range receiver for MRI

Electricity: measuring and testing – Particle precession resonance – Spectrometer components

Reexamination Certificate

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C341S139000

Reexamination Certificate

active

07403010

ABSTRACT:
A receiver for a resonance signal of a magnetic resonance imaging system generates a baseband signal for image processing by dividing a raw resonance signal among multiple parallel channels, each amplified at a respective gain. A digital channel selector determines, at any given moment, a lowest-distortion channel to be further processed. Amplitude and phase error compensation are handled digitally using complex multipliers, which are derived by a calibration, based on a simple Larmor oscillator, which can be done without the need for a sample and without repeating when measurement conditions are changed. One of the important benefits of the invention is that it provides for gain selection without repeated calibration steps. This is particularly important in systems that employ fast imaging techniques such as fast spin echo, where the invention can speed imaging substantially.

REFERENCES:
patent: 3810001 (1974-05-01), Ernst
patent: 4070708 (1978-01-01), Smallcombe et al.
patent: 4665364 (1987-05-01), Hanawa
patent: 4700138 (1987-10-01), Shimazaki et al.
patent: 4703267 (1987-10-01), Maudsley
patent: 4806866 (1989-02-01), Maier
patent: 4825162 (1989-04-01), Roemer et al.
patent: 4831329 (1989-05-01), Hughes
patent: 4871966 (1989-10-01), Smith et al.
patent: 5023552 (1991-06-01), Mehlkopf et al.
patent: 5093621 (1992-03-01), Den Boef et al.
patent: 5160891 (1992-11-01), Keren
patent: 5202686 (1993-04-01), Rapp et al.
patent: 5451876 (1995-09-01), Sandford et al.
patent: 5510711 (1996-04-01), Molyneaux et al.
patent: 5529068 (1996-06-01), Hoenninger
patent: 5621321 (1997-04-01), Liu et al.
patent: 5653233 (1997-08-01), Pelc et al.
patent: 5739691 (1998-04-01), Hoenninger
patent: 5742163 (1998-04-01), Liu et al.
patent: 6025717 (2000-02-01), Hertz et al.
patent: 6043659 (2000-03-01), McKinnon
patent: 6046591 (2000-04-01), King et al.
patent: 6289232 (2001-09-01), Jakob et al.
patent: 6333707 (2001-12-01), Oberhammer et al.
patent: 6424153 (2002-07-01), Liu et al.
patent: 6448770 (2002-09-01), Liu et al.
patent: 6549799 (2003-04-01), Bock et al.
patent: 6621433 (2003-09-01), Hertz
patent: 6636038 (2003-10-01), Heid
patent: 6683494 (2004-01-01), Stanley
patent: 6943548 (2005-09-01), Hertz
patent: 0380174 (1990-08-01), None
patent: 0431684 (1991-06-01), None
patent: 62073146 (1987-04-01), None
patent: 01221153 (1989-09-01), None
patent: 02305549 (1990-12-01), None
patent: 04079937 (1992-03-01), None
patent: 6078899 (1994-03-01), None
Porter et al., A Sisteen Channel Multiplexing Upgrade for Single Channel Receivers, Sep. 2001, Magnetic Resonance Imaging, vol. 19 No. 7, pp. 1009-1016.
Frederick et al., A Phased Array Echoplanar Imaging System for fMRI, Jan. 2001, Magnetic Resonance Imaging, vol. 19 No. 1, pp. 121-129.
Robert W. Dykstra, “An NMR Preamplifier Modification Provides Increased Proton Sensitivity”, Journal of Magnetic Resonance, 1988, vol. 78, pp. 574-576.

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