Radiant energy – Inspection of solids or liquids by charged particles – Analyte supports
Patent
1975-03-18
1976-09-28
Smith, Alfred E.
Radiant energy
Inspection of solids or liquids by charged particles
Analyte supports
250449, 250362, 250363S, 250490, G01M 2300
Patent
active
039833992
ABSTRACT:
An improved method and apparatus for transaxial tomographic scanning a patient. A scanning system is provided having a rotatably mounted X-ray radiation source/detector assembly which orbits and scans the patient in a 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 and respectively aligned with a different one of the beams. Radiation intensity data is collected at predetermined orientation of each beam - detector pair as the assembly orbits about the patient. In one embodiment the source and detector are rotated as a unit through a rotation angle .phi. about center of rotation while the assembly orbits the patient through an orbit angle .gamma.. Measurements are taken as the beams from the X-ray source sweep, due to the source detector rotation relative to a patient, through substantially uniformly spaced, coplanar points [t, (k), .theta.(n)] defined from an origin lying in the plane of orbit. Exact reconstruction is achieved when measurements are taken at the angles .phi., .gamma. characterized substantially as
REFERENCES:
patent: 3106640 (1963-10-01), Oldendorf
patent: 3158744 (1964-11-01), Bernstein
patent: 3432657 (1969-03-01), Slavin
patent: 3778614 (1975-12-01), Hounsfield
patent: 3866047 (1975-02-01), Hounsfield
"Cylindrical and Section Radioisotope Scanning of the Liver and Brain" Kuhl et al., Radiology, vol. 83, No. 5, pp. 926-936, 1964.
Cox, Jr. Jerome R.
Snyder Donald L.
Anderson B. C.
Picker Corporation
Smith Alfred E.
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