Patent · US Active

Background field removal method for MRI using projection onto dipole fields

US9448289B2 · kind B2 · utility

16Cited by

0References

14Claims

0Family size

Assignee

Cornell University · IT

Inventors

Yi Wang · New York, US
Ludovic de Rochefort · Montrouge, FR
Tian Liu · New York, US
Ildar Khalidov · Saint Petersburg, RU

Key dates

Filing date	Nov 23, 2011
Grant date	Sep 20, 2016
Priority date	—
Expiry date	Oct 20, 2033

Classification

Technology area (CPC G)Physics
CPC primaryG06T2207/10088
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

For optimal image quality in susceptibility-weighted imaging and accurate quantification of susceptibility, it is necessary to isolate the local field generated by local magnetic sources (such as iron) from the background field that arises from imperfect shimming and variations in magnetic susceptibility of surrounding tissues (including air). We present a nonparametric background field removal method based on projection onto dipole fields in which the background field inside an ROI is decomposed into a field originating from dipoles outside the ROI using the projection theorem in Hilbert space.

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