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:
Mar. 01, 1988
Filed:
Jul. 19, 1985
Neil A Iverson, Mentor, OH (US);
Robert A Cecil, Solon, OH (US);
Marc R Sontag, Cherry Hill, NJ (US);
Picker International, Inc., Cleveland, OH (US);
Abstract
A differential scatter-air ratio calculation procedure is utilized to calculate scatter contribution which when combined with primary radiation yields patient dose. The lengthy polar coordinate integration of the prior art is replaced with a rectangular coordinate integration which to an extent can be performed outside an integration loop. Beam characteristics are entered into a one dimensional matrix BWP. A second matrix RSAR includes the differential scatter air ratio for incremental regions within the patient at a certain depth and radial distance from a scatter calculation point. During a rectangular coordinate integration, a two dimensional coordinate within a patient plane determines an offset into both the one dimensional beam characteristic matrix BWP and the differential scatter-air ratio matrix RSAR. Then values are multiplied to produce a scatter contribution from the incremental region.