X-ray or gamma ray systems or devices – Specific application – Absorption
Reexamination Certificate
2005-03-08
2005-03-08
Glick, Edward J. (Department: 2882)
X-ray or gamma ray systems or devices
Specific application
Absorption
C378S205000
Reexamination Certificate
active
06865253
ABSTRACT:
A method for accurately positioning a patient for radiotherapy and/or radiosurgery, comprising the following steps: the patient is pre-positioned as accurately as possible with respect to a linear accelerator; at least two x-ray images of the patient and/or one of the parts of his body in the vicinity of the radiation target point are produced from different respective recording angles on a single image recorder; the x-ray image is spatially localized; at least one reconstructed image, corresponding to each x-ray image and deriving from a three-dimensional patient scan data set, is produced, the reconstructed images containing the desired image contents of the x-ray images when the patient is correctly positioned; and the real x-ray images are superimposed, and the positioning error is determined electronically and/or with computer guidance by way of particular landmarks and/or the intensity gradient or the contours in the two images; and the position of the patient is corrected by way of the determined positioning error.
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Blumhofer Andreas
Fröhlich Stephan
Lachner Rainer
Schlossbauer Cornel
Glick Edward J.
Song Hoon
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