Radiography

Details Radiography Radiography

G - Physics

01

T

358/11

G01T 1/16 (2006.01) A61B 6/03 (2006.01) G01T 1/161 (2006.01) H01J 35/30 (2006.01) H05G 1/66 (2006.01)

Patent

CA 1070858

ABSTRACT OF THE DISCLOSURE Radiographic apparatus is described for evaluating the absorption coefficient of a body at each of a plurality of locations distributed over a slice of a body. A source is arranged to produce a fan-shaped beam of radiation which is directed through the body and the source is orbited around the body about an axis intersecting the slice. Detectors are provided, and orbited in synchronism with the orbital motion of the source, each to detect the radiation emergent from the body along a plurality of paths. A lateral scan is imposed on the source relative to the detectors, the scan being repetitive so that, during each scan, each detector receives radiation along a plurality of mutually inclined beam paths. The beam paths thus examined are sufficient in number and distribution to allow the construction of composite measurements for a plurality of sets of composite, parallel beam paths distributed over the slice for processing to derive a representation of absorption coefficients for the slice.

263680

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