Method for reconstructing a CT image using an algorithm for a short-scan circle combined with various lines

US7359477B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Günter Lauritsch · Nuremberg, DE
• Frank Dennerlein · Forchheim, DE

Key dates

• Filing date: Feb 15, 2005
• Grant date: Apr 15, 2008
• Expiry date: Sep 21, 2025

Classification

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

Abstract

In a method for reconstructing a CT image from data acquired from an examination subject, a reconstruction algorithm is employed that is based on an ideal short-scan circle-and-line trajectory. To adapt the reconstruction algorithm to a “real world” scan trajectory, data are acquired with a C-arm CT apparatus wherein the focus is moved through an actual short-scan circle-and-line trajectory. For each position of the focus in the actual trajectory, a projection matrix is electronically generated and the reconstruction algorithm with the ideal trajectory is adapted to the actual trajectory using the projection matrices.