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:
Oct. 01, 2002
Filed:
Mar. 17, 2000
Curt Wiedenhoefer, El Macero, CA (US);
Steven F. Glander, Davis, CA (US);
Stephen L. Gage, Wilton, CA (US);
Paul Katsch, Davis, CA (US);
Eisenlohr Technologies, Inc., Davis, CA (US);
Abstract
A radiographic reference marker which facilitates the accurate calculation of the degree of magnification or minification or minimization of radiographic images includes a reusable portion and a disposable portion. The reusable portion includes a radiopaque sphere of outside diameter d , and a radiolucent plastic housing capable of frictionally but removably engaging the sphere and including a plate attaching face and a housing attaching face. The plate attaching face includes in a center portion thereof an aperture of a diameter capable of allowing passage therethrough of the sphere, and the housing attaching face includes a first portion of a means for removably attaching the reusable portion to the disposable portion. The reusable portion also includes an attenuating plate having a first surface and a second surface, a thickness sufficient to attenuate radiation, and a component for removably attaching the second surface of the attenuating plate to the plate attaching face of the plastic housing. The disposable portion includes a mounting substrate having a substrate attaching face and a mounting face, and the substrate attaching face includes a second portion of the component for removably attaching the reusable portion to the disposable portion. The mounting face also includes a component for removably attaching the mounting substrate to a subject.