Method and apparatus for reconstruction calibration of detector position and source motion based on a multi-pin phantom

US7006594B2 · kind B2 · utility

Assignee

• GE Medical Systems Global Technology Company, LLC · US

Inventors

• Erik Chell · Oakland, US
• John L. Couch · San Francisco, US
• Paul Magnuson · Hillsborough, US

Key dates

• Filing date: Nov 11, 2002
• Grant date: Feb 28, 2006
• Expiry date: May 25, 2023

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R31/305
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Certain embodiments relate to a method and apparatus for calibrating an imaging system having an array of detector elements arranged with respect to a reference position and having an energy source moving in a pattern to irradiate the array of detector elements. The method includes initiating estimated detector positions for the array of detector elements and an estimated motion pattern for the energy source. The estimated detector positions and motion pattern are defined with respect to a reference position in the imaging system. The method further includes scanning a phantom having pins located at positions in the phantom and calculating estimated pin positions, with respect to the reference position, based on at least one of the estimated detector positions and motion pattern. The method further includes modifying at least one of the estimated detector positions and motion pattern based on at least two of the estimated detector positions, motion pattern and pin positions.