X-ray or gamma ray systems or devices – Specific application – Tomography
Patent
1993-03-09
1994-09-27
Church, Graig E.
X-ray or gamma ray systems or devices
Specific application
Tomography
378 24, G01N 2300
Patent
active
053512782
ABSTRACT:
This invention relates to an X-ray tomography apparatus and a method therefor. The apparatus comprises an X-ray source for irradiating X rays to an inspection object; inspection object an rotating arrangement for rotating the inspection object about a first rotational axis slanted to an, optical axis of X rays generated from the X-ray source; and an X-ray detecting arrangement where an X-ray image transmitted through the inspection object rotated by the inspection object rotating arrangement is rotated and superposed in synchronization with the inspection object rotated about second rotational axis in parallel to the first rotational axis, and the X-ray projection image outside of a focal plane perpendicular to the first rotational axis passing through an intersection of the optical axis and the first rotational axis is blurred and the X-ray tomographic image in the focal plane is detected as a clear image signal, thereby the X-ray tomographic image in the focal plane can be obtained based on the image signal obtained from the X-ray detecting arrangement.
REFERENCES:
patent: 2998518 (1961-08-01), Guntert
"Spatial Filtering to Improve Transverse Tomography" Peters, IEEE Transactions on Biomedical Engineering, vol. 21, No. 3, May 1974 pp. 214-219.
Koshishiba Hiroya
Yoshimura Mihoko
Church Graig E.
Hitachi , Ltd.
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