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. 10, 2012
Filed:
Feb. 22, 2011
Martin Annis, Cambridge, MA (US);
Martin Annis, Cambridge, MA (US);
Other;
Abstract
An x-ray source emits a cone beam a rapidly rotating, x-ray-opaque disc with four narrow radial slots. The slots break the cone beam into fan beams that are emitted to an x-ray-opaque plate with a narrow slit. As each fan beam moves across the plate, the slit produces a scanning x-ray pencil beam. The backscatter detector is mounted adjacent to the plate and has a slightly larger slit that is aligned with the plate slit. The pencil beam enters the object space through the detector slit. The pencil beam moves rapidly in a line across the object space, 20 cm in 0.1 second. Simultaneously, the assemblage of x-ray source, disc, plate, and detector moves slowly in the x direction at 1 mm in 0.05 second. Thus, the raster scan of the 20 cm×20 cm region is accomplished in 10 seconds.