X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Reexamination Certificate
2003-03-10
2008-03-11
Glick, Edward J. (Department: 2882)
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
Reexamination Certificate
active
07342992
ABSTRACT:
The invention relates to an X-ray apparatus which includes an X-ray source (2) for the emission of a conical X-ray beam and an X-ray detector (3) for the multiple detection of the X-rays after their passage through an object to be examined, being arranged along an object axis (4), while the X-ray source (2) and the X-ray detector (3) are displaced along a trajectory. In order to increase the size of the reconstructable examination zone without increasing the size of the X-ray detector, and in order to minimize the problem caused by projections truncated in the transverse direction, the invention proposes an X-ray apparatus which includes means (12, 14, 15) for changing the position and/or the orientation of the X-ray detector (3) relative to the X-ray source (2) and a control unit (11) for displacing the X-ray source (2) and the X-ray detector (3) along the trajectory and for controlling the position and/or the orientation of the X-ray detector (3) during the detection of the X-rays.
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Jaffray et al., “Flat-Panel Cone-Beam Computed Tomography for Image-Guided Radiation Therapy,” 2002, Int. J. Rad. Onc. Biol. Phys., vol. 53, No. 5, pp. 1337-1349.
Glick Edward J.
Koninklijke Philips Electronics , N.V.
Midkiff Anastasia S.
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