Methods, systems, and computer-program products to estimate scattered radiation in cone-beam computerized tomographic images and the like

US7336760B2 · kind B2 · utility

Assignee

• Varian Medical Systems Technologies, Inc. · US

Inventors

• Gary Virshup · Cupertino, US
• Roland Suri · Zürich, CH
• Edward J. Seppi · Portola Valley, US
• Edward Shapiro · Menlo Park, US
• Josh Star-Lack · Palo Alto, US
• Erik Chell · Oakland, US

Key dates

• Filing date: Jul 28, 2006
• Grant date: Feb 26, 2008
• Expiry date: Jul 28, 2026

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S378/901
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Disclosed are imaging systems, methods, and computer program products that generate estimates of scattered radiation in tomographic imaging systems, such as cone-beam computerized tomography (CBCT) systems, and the like. In an exemplary embodiment, a first group of projections is taken of an object with the radiation covering a wide band of the object, and a second group of projections is taken of the object with the radiation covering a narrower band of the object. The projections of the second group cover less of the object, but have less scattered radiation. The scattered radiation within the narrower band may be estimated from differences between projections from the first and second groups, or from representations thereof.