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:
Aug. 07, 1984
Filed:
Oct. 16, 1981
Kaoru Machida, Otawara, JP;
Abstract
Disclosed is a radiography apparatus comprising an X-ray tube for radiating X-ray beam in a fan shape, a detector for detecting the X-ray beam coming through a living body at a plurality of angular components of the X-ray beam, and a sampling circuit for sampling an output signal of the detector when the living body moves at a given speed in a direction orthogonal to the plane of the X-ray beam, whereby a radiogram is formed by using the output signal of the sampling circuit. In the radiography apparatus, the distance between the living body and the X-ray tube is variable and is detected by a potentiometer interlocked with the movement of the living body. A pulse signal at a frequency corresponding to an output level of the potentiometer is produced by a pulse frequency modulation circuit, and is supplied as a timing signal to the sampling circuit. Thus, a sampling frequency of the sampling circuit is determined by the distance between the X-ray tube 10 and the living body, so that a radiogram with the same enlargement factor in the X and Y directions is obtained.