Motion detection and correction of magnetic resonance data

US10126457B2 · kind B2 · utility

Assignee

• Baker Hughes, a GE company, LLC · US

Inventors

• Radu Coman · Hannover, DE
• Holger Tietjen · Hannover, DE
• Martin Blanz · Culham, GB
• Holger Thern · Hannover, DE

Key dates

• Filing date: Mar 4, 2016
• Grant date: Nov 13, 2018
• Expiry date: Dec 10, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G01V2200/14
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A nuclear magnetic resonance (NMR) apparatus includes a transmitting assembly configured to emit one or more dual-wait-time pulse sequences, and a receiving assembly configured to detect a long-wait-time echo train and a short-wait-time echo train. The apparatus also includes a processor configured to perform at least one of: estimating a difference between the long-wait-time echo train and the short-wait-time echo train to generate a differential echo-train, inverting the differential echo-train into a differential T2 distribution, and detecting a motion artefact in response to determining that the differential echo-train includes a short-T2 porosity fraction that is greater than a threshold value; and inverting two echo trains into two T2 distributions, calculating at least two porosity fractions for each of the two T2 distributions, estimating a shift of a porosity amount between the at least two porosity fractions, and detecting the motion artefact based on the shift.