Back to results
US 4,053,780 AGranted
Method for calibration of an axial tomographic scanner
AssigneeSyntex (U.S.A.) Inc.
InventorRobert A. Sparks
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeSyntex (U.S.A.) Inc.
InventorRobert A. Sparks
Estimating the term…
The method of calibrating an axial tomographic scanner including frame means having an opening therein in which an object to be examined is to be placed, source and detector means mounted on the frame means for directing one or more beams of penetrating radiation through the object from the source to the detector means, and means to rotate the scanner including the source and detector means about the object whereby a plurality of sets of data corresponding to the transmission or absorption by the object of a plurality of beams of penetrating radiation are collected; the calibration method comprising mounting calibration means supporting an adjustable centering member onto the frame means, positioning the adjustable centering member at approximately the center of rotation of the scanner, placing position-sensitive indicator means adjacent the approximately centered member, rotating the scanner and the calibration means mounted thereon at least one time and, if necessary, adjusting the positioning of the centering member until the centering member is coincident with the center of rotation of the scanner as determined by minimum deflection of the position-sensitive indicator means, rotating and translating the source and detector means and determining for each angular orientation of the frame means supporting the source and detector means (a) the central position of each translational scan relative to the centered member and/or (b) if a plurality of detectors are utilized with the detector means for each planar slice of the object being examined, the central position of each translational scan for each detector relative to the centered member.
A method of calibrating an axial tomographic scanner including frame means having an opening therein for receiving an object to be examined, a source of penetrating radiation and detector means mounted on the frame means for directing one or more beams of penetrating radiation from the source to the detector means, means to rotate the frame means including the source and the detector means mounted thereon about the opening and means to translate the source and the detector means laterally across the opening between successive rotations of the frame means by the rotation means;
A method of calibrating an axial tomographic scanner including frame means having an opening therein for receiving an object to be examined, a source of penetrating radiation mounted on the frame means, detector means mounted on the frame means having a plurality of detectors associated therewith, the source and detector means being adapted for directing a plurality of beams of penetrating radiation from the source to the detector means, means to rotate the frame means including the source and the detector means mounted thereon about the opening, and means to translate the source and the detector means laterally across the opening between successive rotations of the frame means;
The method of calibrating an axial tomographic scanner including means having an opening therein for receiving an object to be examined, a source of divergent penetrating radiation mounted on the frame means, detector means having a plurality of detectors associated therewith for receiving the penetrating radiation directed thereto from the source, means to rotate the frame means including the source mounted thereon about the opening;
Dependencies are inferred from the claim text.