The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 24, 1976
Filed:
Mar. 18, 1975
Carl J Brunnett, Mayfield Heights, OH (US);
Jerome R Cox, Jr, St. Louis, MO (US);
Donald L Snyder, Clayton, MO (US);
Rodney A Mattson, Mentor, OH (US);
Picker Corporation, Cleveland, OH (US);
Abstract
An improved method and apparatus for transaxial tomographic scanning of a patient. A scanning system is provided having a rotatably mounted X-ray radiation source/detector pair which orbits and radially scans the patient in the plane of orbit. The source provides a plurality of beams of radiation having axes in the orbital plane. The beams pass through the patient to an array of detectors each of which is aligned with one of the beams. Radiation intensity data is collected at predetermined orientations of each beam/detector pair as the assembly orbits about the patient. In a preferred embodiment the rotatably mounted source-detector pair is rotated as a unit through a preselected rotation angle .phi. about an axis effectively passing through the source. The axis and the source-detector pair connected to it are then orbited around the patient through an orbit angle .gamma. while maintaining the preselected rotation angle .phi.. The axis is orbited about an origin lying in the orbital plane. A set of measurements is taken during the orbit as the beams from the X-ray source sweep through substantially uniformly spaced, coplanar points [t(k), .theta.(n)] defined about the origin. After an orbit, the rotation angle .phi. is incremented, and the source detector pair re-orbits the patient for providing a new set of measurement data corresponding to the incremental rotation angle .phi.. Exact reconstruction is achieved after several orbit cycles when measurements are taken at the angles .phi., .gamma. characterized substantially as ##EQU1## OF ROTATION, AND K, N ARE INTEGERS.