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:
Aug. 11, 1992
Filed:
Mar. 10, 1989
Richard C Lanza, Brookline, MA (US);
Joseph R Votano, Tewksbury, MA (US);
Expert Image Systems, Inc., Somerville, MA (US);
Abstract
Methods and apparatus for precise and consistent selection of bone mineral content (BMC) measurement regions of selected bones, and accurate calculation of BMC from a displayed radiological image of the bones, calculate the position of the styloid tip of each bone, define a measurement region having selected positional correspondence to the position of the styloid tip, and sum pixel intensity values in the measurement region to yield a pixel intensity sum representative of bone mineral content. Bone density values are obtained by dividing the pixel intensity sum by a value representative of the areas of the measurement region, to yield a value representative of bone density. The position of the styloid tip is calculated by detecting selected transverse image edges, searching along the selected transverse image edges to determine a set of pixels which define extremities of the styloid tip, and defining a line substantially tangent to the styloid tip.