Method and apparatus for collecting X-ray absorption data in X-r

Details Method and apparatus for collecting X-ray absorption data in X-r Method and apparatus for collecting X-ray absorption data in X-r

1981-10-02

1984-08-07

Church, Craig E.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 11, G03B 4116

Patent

active

044647751

ABSTRACT:
In a method of collecting X-ray absorption data in an X-ray tomographic apparatus, an X-ray tube and an X-ray detector arranged to face each other via a body are caused to undergo reciprocation along a plane section of the body for collecting X-ray absorption data of the plane section in a given angular aspect. Two different kinds of X-ray absorption data dependent upon respective different energy levels are collected on the basis of different tube voltage during the respective forward and return movements in one reciprocation. After one reciprocation, the X-ray tube and X-ray detector are rotated by a predetermined angle relative to the body. The reciprocation and rotation are alternately repeated to collect X-ray absorption data of the plane section of the body in various angular aspects. The accuracy of the CT value can be increased using the two different kinds of X-ray absorption data during the forward and backward movements and also the difference between these two X-ray absorption data.

REFERENCES:
patent: 3924131 (1975-12-01), Hounsfield
patent: 3946234 (1976-03-01), Hounsfield
patent: 3971948 (1976-07-01), Pfeiler
patent: 4029963 (1977-06-01), Alvarez
patent: 4066903 (1978-01-01), LeMay
patent: 4091285 (1978-05-01), Logan
patent: 4091287 (1978-05-01), Hounsfield
patent: 4103169 (1978-07-01), Hounsfield
patent: 4149031 (1979-04-01), Seppi

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