X-ray CT scanner device

Details X-ray CT scanner device X-ray CT scanner device

1990-06-20

1991-06-18

Westin, Edward P.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 4, 378901, G01N 2300

Patent

active

050254634

ABSTRACT:
A fourth-generation X-ray CT scanner device comprises an X-ray tube for irradiating X-rays in a sector form to an object while moving on a circular orbit around the object, an annular X-ray detector array disposed coaxially with and inside the circular orbit of the X-ray tube and arranged to surround the object, for detecting the X-rays which have been irradiated from the X-ray tube and passed through the object for each channel, and a reconstruction unit for acquiring an output of the detector array to effect the reconstruction process and create a tomographic image. The X-ray array is formed of a large number of solid-state X-ray detectors and a plurality of the detectors constitute a detector module, and the array includes a large number of modules. In a displayed tomographic image, in a case where linear artifacts radiated from one point in various directions are detected, a detector module lying on an intersection (radiation point) of the artifact lines is determined as a defective detector module, and a reconstruction image is created without using output data of the defective detector module.

REFERENCES:
patent: 4583241 (1986-04-01), Walters
patent: 4680782 (1987-07-01), Tan et al.
patent: 4707822 (1987-11-01), Hopkinson et al.
patent: 4712178 (1987-12-01), Tuy et al.
patent: 4754468 (1988-06-01), Mori
patent: 4841553 (1989-06-01), Nagai
patent: 4969166 (1990-11-01), Hahn

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