The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 29, 1980
Filed:
Jul. 13, 1977
Kiyoto Saito, Yokohama, JP;
Tokyo Shibaura Electric Co., Ltd., Kawasaki, JP;
Abstract
A computed tomograph system comprises a radiation source for emitting a fan-shaped beam of penetrating radiation of included angle .alpha., and a radiation detector comprising a plurality of radiation detection cells on which the fan-shaped beam falls. Between the radiation source and the radiation detector a subject to be examined is placed. The radiation source and radiation detector are mounted on a support frame. The support frame is movable along an axis defined between the radiation source and the subject and rotatable with the subject as a center. The support frame is moved by a shifting mechanism so as to be adjustable in accordance with the size of the area of the subject to be examined or the size of the region of interest, and rotated by a rotating mechanism. The radiation source has a variable diaphragm for permitting the included angle .alpha. of the fan-shaped beam to be varied according to the size of the area of the subject and a variable slit for varying the thickness of the fan-shaped beam. The radiation detector has a variable collimator on a radiation incident plane to permit the collimating width of the fan-shaped beam path to be varied according to the width of the slit opening.