Patent · US Expired

Method and apparatus for mapping and correcting geometric distortion in MRI

US7330026B2 · kind B2 · utility

13Cited by

8References

13Claims

0Family size

Assignee

The University Of Queensland · AU

Inventors

Deming Wang · Brisbane, AU
David M. Doddrell · Brisbane, AU

Key dates

Filing date	May 29, 2003
Grant date	Feb 12, 2008
Priority date	—
Expiry date	May 29, 2023

Classification

Technology area (CPC G)Physics
CPC primaryG01R33/58
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A three-dimensional grid (10) is used as a phantom for mapping geometric distortion in magnetic resonance imaging (MRI) apparatus. This phantom provides an array of densely distributed control points in three-dimensional space. These points are each defined by three orthogonal planes. In the phantom image, the planes are determined by detecting boundary surfaces between portions of the phantom and its surrounding medium, enabling the positions of the control points to be measured to sub-voxel accuracy. The mapped distortion can then be used to automatically correct images produced by the MRI apparatus.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.