Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1996-09-17
1997-05-06
O'Shea, Sandra L.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
324320, 335297, G01R 3320
Patent
active
056274718
ABSTRACT:
A magnetic resonance imager has a magnetically permeable core and two pole pieces, each pole piece having a face. The pole pieces are arranged on the core such that the pole piece faces are in opposed relationship forming a first gap therebetween. At least one of the pole pieces is comprised of an outer element 23 connected to the core and an inner element 24 connected between the outer element and the first gap. The outer element 23 forms a cup inside which the inner element 24 is disposed. A plurality of screws 11, 12 and 13 are disposed through the outer element 23 and engage the inner element 24 such that a second gap is formed between the inner and outer element. The homogeneity of the magnetic field in the first gap is affected by adjusting the position of the inner element relative to the outer element via screws 11, 12 and 13. The inner element being tiltable relative to the outer element by adjusting screws 12; moveable in the direction of its principal plane by adjusting screws 11; and formable into an arched surface by adjusting screws 13.
REFERENCES:
patent: 3223897 (1965-12-01), Sullivan
patent: 4093912 (1978-06-01), Double et al.
patent: 4672346 (1987-06-01), Miyamoto et al.
patent: 4673882 (1987-06-01), Buford
patent: 4682111 (1987-07-01), Hughes
patent: 4818966 (1989-04-01), Miyamoto et al.
patent: 4937545 (1990-06-01), Chaillout et al.
patent: 5003276 (1991-03-01), Sarwinski et al.
patent: 5194810 (1993-03-01), Breneman et al.
patent: 5278534 (1994-01-01), Abele et al.
patent: 5363078 (1994-11-01), Ries et al.
patent: 5431165 (1995-07-01), Sellers
patent: 5495222 (1996-02-01), Abele et al.
Double et al, "Collar to Mechanically adjust pole face parallelism", IBM Technical Disclosure Bull. vol. 18, No. 1 (Jun. 1975).
Double, "Manual Field Adjustment for NMR Magnet" IBM Tech. Discl. Bull. vol. 20, No. 4 (Sep. 1977).
Fry J. J.
Gurin T. B.
Mah Raymond Y.
O'Shea Sandra L.
Picker Nordstar Inc.
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