Automatic dynamic focusing for computed tomography

Details Automatic dynamic focusing for computed tomography Automatic dynamic focusing for computed tomography

1987-11-19

1990-11-06

Church, Craig E.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 4, 378 7, 378146, 378150, 378 19, G01N 2300

Patent

active

049691651

ABSTRACT:
A dynamic focusing device is provided for an X-ray scanner, the device comprising at least one detector module located in a position to receive, be illuminated by, and respond to X-rays. A source of X-rays is movable toward or away from the detector module. The module comprises a plurality of crystals each having a scintillation surface located in a common plane, with a plurality of septa separating the crystals. The septa have a height which is upstanding above the surfaces of the crystals far enough to reduce lateral X-ray scatter and to cast a shadow upon the surfaces of the crystals responsive to an illumination thereof from said X-ray source. The invention dynamically positions the detector module relative to the distance between the detector module and the source of X-rays in order to reduce substantially to a minimum any shadow in the X-rays cast by the septa upon the surfaces of the crystals.

REFERENCES:
patent: 3790782 (1974-02-01), Inoue et al.
patent: 4229651 (1980-10-01), Danos
patent: 4340818 (1982-07-01), Barnes
patent: 4780904 (1988-10-01), Winter

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