Metal resistant MR imaging reference scan

US9977108B2 · kind B2 · utility

Assignee

• KONINIKLIJKE PHILIPS N.V. · NL

Inventors

• Kay Nehrke · Ahrensburg, DE
• Peter Boernert · Hamburg, DE
• Johan Michiel Den Harder · Eindhoven, NL
• Thomas Hendrik Rozijn · Eindhoven, NL

Key dates

• Filing date: Sep 11, 2013
• Grant date: May 22, 2018
• Expiry date: Feb 9, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/385
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention relates to a method of parallel MR imaging, wherein a reference scan is performed by means of a stimulated echo sequence including i) at least two preparation RF pulses (α) radiated toward a portion of a body (10) during a preparation period (21), and ii) one or more reading RF pulses (β) radiated toward the portion of the body (10) during an acquisition period (22) temporally subsequent to the preparation period (21). One or more FID signals (I1) and one or more stimulated echo signals (I2) are acquired during the acquisition period (22). The spatial receive and/or—if applicable—transmit4 sensitivity profiles of at least two RF coils (11, 12, 13) are derived from the acquired FID signals (I1) and/or from the acquired stimulated echo signals (I2). The parameters of the stimulated echo sequence are selected such that it is robust against susceptibility-induced artifacts. Moreover, 10 the invention relates to a MR device (1) and to a computer program for a MR device (1).