Alignment of an x-ray tube focal spot using a deflection coil

Details Alignment of an x-ray tube focal spot using a deflection coil Alignment of an x-ray tube focal spot using a deflection coil

1994-11-28

1996-08-27

Wong, Don

X-ray or gamma ray systems or devices

Electronic circuit

X-ray source power supply

378121, 378137, H01J 3530

Patent

active

055508898

ABSTRACT:
Precise alignment of the focal spot position on an x-ray CT system is achieved using a deflection coil that produces a magnetic field which acts on the electron beam path in the x-ray tube. A variable current power supply drives the deflection coil and is controlled by input signals to align the focal spot at a static reference position, to correct for focal spot drift between scans, and to wobble the focal spot position during a scan or between scans.

REFERENCES:
patent: 4171476 (1979-10-01), Waltham
patent: 4178511 (1979-12-01), Hounsfield et al.
patent: 4637040 (1987-01-01), Sohval et al.
patent: 4827494 (1989-05-01), Koenigsberg
patent: 4993055 (1991-02-01), Rand et al.
patent: 5291535 (1994-03-01), Baker et al.
patent: 5313510 (1994-05-01), Ebersberger, et al.

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