Patent · US Active

SAR reduction in parallel transmission by K-space dependent RF pulse selection

US8890524B2 · kind B2 · utility

3Cited by

2References

24Claims

0Family size

Assignee

KONINIKLIJKE PHILIPS N.V. · NL

Inventors

Peter Boernert · Hamburg, DE
Ingmar Graesslin · Wenningstedt-Braderup (Sylt), DE
Kay Nehrke · Ahrensburg, DE

Key dates

Filing date	Apr 1, 2010
Grant date	Nov 18, 2014
Priority date	—
Expiry date	Apr 21, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG01R33/543
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

When generating an MR image using a multi-channel transmit coil arrangement, SAR is reduced by employing a number of different RF pulses in a single scan. Each RF pulse exhibits a different performance and/or accuracy, resulting in different RF pulse-specific SAR values. As a result, the RF pulses differ slightly in actual excitation pattern, B1 waveform and/or k-space trajectory, etc. The average SAR over a single scan is thus reduced compared to a fixed RF pulse, without compromising image quality.

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