Surgery – Sexual appliance – Retention means
Reexamination Certificate
2005-12-20
2005-12-20
Robinson, Daniel (Department: 3742)
Surgery
Sexual appliance
Retention means
Reexamination Certificate
active
06976953
ABSTRACT:
A new technique for maintaining the alignment of electric and magnetic fields in an x-ray tube so the tube can be operated in the presence of a static external magnetic field without being negatively affected thereby. Deflection of the electron beam of the x-ray tube by the high magnetic field is reduced or eliminated by modifying or canceling, at a location near the electron beam, the magnetic field components transverse to the beam. In a preferred embodiment, a set of electromagnet coils are positioned on or near the tube and oriented in a way that when current is applied internal magnetic fields are produced in a direction opposite to the transverse magnetic fields, thereby causing cancellation. In one implementation, one or more sensors are used to detect the transverse magnetic fields. The sensor is positioned near the electron beam, either inside or outside the x-ray tube. The sensor produces a signal dependent on a static magnetic field component transverse to the desired direction of the electron beam. This signal is used to control the amount of current applied to the coils. A controller and a feedback circuit may be included to adjust in real time the amount of current being applied.
REFERENCES:
patent: 4455277 (1984-06-01), Schlitt
patent: 5077774 (1991-12-01), Piestrup et al.
patent: 5125019 (1992-06-01), Evain et al.
patent: 5369679 (1994-11-01), Sliski et al.
patent: 5442678 (1995-08-01), Dinsmore et al.
patent: 5528652 (1996-06-01), Smith et al.
patent: 5550889 (1996-08-01), Gard et al.
patent: 5563407 (1996-10-01), Yamagishi
patent: 5713357 (1998-02-01), Meulenbrugge et al.
patent: 5757118 (1998-05-01), Kubo
patent: 5807254 (1998-09-01), Meulenbrugge et al.
patent: 5818901 (1998-10-01), Schulz
patent: 6031888 (2000-02-01), Ivan et al.
patent: 6055294 (2000-04-01), Foerst et al.
patent: 6101239 (2000-08-01), Kawasaki et al.
patent: 6151384 (2000-11-01), Reed et al.
patent: 6233474 (2001-05-01), Lemelson
patent: 6256371 (2001-07-01), Hasegawa et al.
patent: 6658085 (2003-12-01), Sklebitz
F, D. Becchetti et al., “Magnetic confinement of radiotherapy beam-dose profiles,” Cyclotrons and Their Applications 2001, Sixteenth International Conference (AIP Press), pp. 44-46.
Dale W Litzenberg et al., “An apparatus for applying strong longitudinal magnetic fields to clinical photon and electron beams,” Phys Med Bio V46 No. 5, pp. N105-N115, (2001).
Frederick D. Becchetti et al., “High energy electron beams shaped with applied magnetic fields could provide a competitve and cost-effective alternative to proton and heavy-ion radiotherapy,” Med Phys 29 (10), Oct. 2002, pp. 2435-2437.
Lumen Intellectual Property Services Inc.
Robinson Daniel
The Board of Trustees of the Leland Stanford Junior University
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