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:
May. 27, 1980
Filed:
Jan. 31, 1978
Tamon Inouye, Tokyo, JP;
Hiroyuki Mizutani, Kawasaki, JP;
Abstract
In a method and an apparatus for performing computed tomography using radiation, the apparatus includes a data selecting unit which divides into a plurality of groups and stores the projection data signals provided by a multitude of radiation beams being projected along several different directions through a slice to be imaged in a subject and penetrating the slice from the external circumference of it with each of the groups corresponding to the beams penetrating along selected directions within a specific scan sector less than 180.degree.; a Fourier transform unit for calculating sample values for the one-dimensional Fourier transform of a projection function formed by each group of said projection data signals; a function calculating unit for calculating sample values for the one-dimensional Fourier transforms as mentioned above for a plurality of projecting directions selected outside said specific scan sector; and a reconstruction unit for calculating the absorption coefficient distribution of the radiation beams in said slice from both said sets of sample values, and a display unit.