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:
Jan. 15, 1991
Filed:
Oct. 02, 1989
Ben A Arnold, Irvine, CA (US);
Other;
Abstract
A calibration phantom for the quantitative computer tomography (QCT) system for bone or other tissue measurement in which a series of graduated reference solutions are retained within cavities formed in a translucent member having x-ray attenuation characteristics closely approximate to human tissue. In preferred embodiment, the reference solutions are sealed under pressure in direct contact with the material forming the base of the phantom. Only a very thin wall separates the solution from the upper and lower surfaces of the phantom. In addition, the cavities are closely adjacent one another. As a result, phantoms constructed in accordance with this invention minimize the size and mass of the phantom and thus minimize x-ray beam hardening, scatter and image are the facts.