Patent · US Active

Magnetic resonance tomography method and apparatus for correcting drift of the B0 field in a temperature map

US8030922B2 · kind B2 · utility

7Cited by

6References

9Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Joerg Roland · Hemhofen, DE
Florian Steinmeyer · Herzogenaurach, DE
Michael Zwanger · Erlangen, DE

Key dates

Filing date	Mar 19, 2009
Grant date	Oct 4, 2011
Priority date	—
Expiry date	Mar 10, 2030

Classification

Technology area (CPC G)Physics
CPC primaryG01R33/56563
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

In a method and device for correction of a B0 field drift in a temperature map acquisition by magnetic resonance tomography, a fluctuation measurement is calculated per pixel from a number of magnetic resonance tomography phase images of an examination subject or from temperature maps derived therefrom. Using this fluctuation measurement, pixels of the phase images or temperature maps with low fluctuation are determined, and corresponding pixels of a phase image to be corrected or of a temperature map to be corrected are selected using the pixels determined as having low fluctuation. The phase image to be corrected or the temperature map to be corrected is adjusted to a reference phase image or a reference temperature map such that the selected pixels of the phase image to be corrected or of the temperature map to be corrected are calibrated to corresponding pixels of the reference phase image or of the reference temperature map.

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