Axially incremented projection data for spiral CT

Details Axially incremented projection data for spiral CT Axially incremented projection data for spiral CT

1995-10-31

1999-05-25

Porta, David P.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378144, H01J 3510

Patent

active

059075929

ABSTRACT:
A method and apparatus for examining an object by rotating a radiant energy generator around the object while projecting a beam of radiant energy towards the object to impinge the object at a plurality of angles in each of a plurality of planes substantially perpendicular to the z-axis, and detecting radiant energy leaving the object after impinging same, to produce sets of projection measurements representing slices of the object in the planes. During rotation of the radiant energy generator, the radiant energy beam is sequentially modulated between two locations along the z-axis to produce, during each rotation of the generator, two sets of projection measurements representing two slices of the object, which projection measurements are used in an interlaced manner for reconstructing the image of the object.

REFERENCES:
patent: 3836804 (1974-09-01), Frens et al.
patent: 4991194 (1991-02-01), Laurent et al.
patent: 5224136 (1993-06-01), Toth et al.

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