Focal spot temperature reduction using three-point deflection

Details Focal spot temperature reduction using three-point deflection Focal spot temperature reduction using three-point deflection

2007-08-29

2009-02-24

Song, Hoon (Department: 2882)

X-ray or gamma ray systems or devices

Source

Electron tube

C378S138000

Reexamination Certificate

active

07496180

ABSTRACT:
An x-ray tube includes an anode comprising a focal track and a cathode assembly configured to emit an electron beam toward a focal spot on the focal track. The x-ray tube also includes a controller configured to wobble the electron beam among a plurality of focal points in a direction tangent to the focal track. The plurality of focal points includes at least one focal point that is bounded by a pair of boundary focal points. The controller is further configured to delay a wobble of the electron beam away from the at least one focal point for a pre-determined amount of time.

REFERENCES:
patent: 6181771 (2001-01-01), Hell et al.
patent: 6778633 (2004-08-01), Loxley et al.
patent: 6968039 (2005-11-01), Lemaitre et al.
patent: 2006/0115050 (2006-06-01), Resnick

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