X-ray or gamma ray systems or devices – Source – Electron tube
Reexamination Certificate
2007-10-23
2007-10-23
Song, Hoon (Department: 2882)
X-ray or gamma ray systems or devices
Source
Electron tube
C378S205000
Reexamination Certificate
active
10833696
ABSTRACT:
Systems, methods and devices for implementing automatic control of focal spot Z axis positioning are disclosed for use with an x-ray device having an x-ray tube positioned within a housing and configured for thermal communication with a temperature control system. Control circuitry, and a position sensing device configured to determine the distance between the focal spot and a reference point related to the x-ray device, are coupled with a control module. The position sensing device sends information concerning the relative distance between the focal spot and the reference point to the control module which compares the received information with a predetermined desired distance. If the received information varies by an unacceptably large margin from the desired distance, the control module sends a corresponding signal to the control circuitry which causes the temperature control system to implement an appropriate change to a heat transfer parameter associated with the x-ray device.
REFERENCES:
patent: 5751788 (1998-05-01), Khutoryansky et al.
patent: 5867556 (1999-02-01), Snyder et al.
patent: 7072439 (2006-07-01), Radley et al.
patent: 2005/0053197 (2005-03-01), Radley et al.
Song Hoon
Varian Medical Systems Technologies, Inc.
Workman Nydegger
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