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. 27, 2004
Filed:
Apr. 18, 2002
Donovan M. Bakalyar, Dearborn, MI (US);
Lance Hefner, Troy, MI (US);
William Beaumont Hospital, Royal Oak, MI (US);
Abstract
The present invention provides an apparatus and method permitting one sheet of radiographic film to be exposed multiple times including a control unit for correcting the optical density of the film based upon the spatial variation of x-ray field intensity. In particular, the present invention includes a system and method for determining an optical density of radiographic imaging film utilizing a mask for absorbing soft x-ray radiation thereby creating a reference exposure, and further utilizing a template to execute a number of sequential exposures of radiographic imaging film such that the radiographic film is selectively irradiated. The control unit is adapted for deriving a corrective optical density value based upon reference measurements, and correcting the series of template exposures using the corrective optical density value.