Fast and accurate 31P B1-mapping at high magnetic fields with short TRs

Name: Breakfast & Science Seminar 50
Start: 2025-04-29
End: 2025-04-29
Location: HUG Tour 8

AUTHORS: Widmaier M., Kaiser A., Baup S., Xiao Y., Jiang Y., Huang Z., Wenz D., Xin L.

ISMRM & SMRT Annual Meeting & Exhibition, : , Singapore, May 2024

ABSTRACT

Motivation

Fast and accurate B1 mapping for³¹P MRI is challenging due to the low sensitivity of ³¹P nucleus and its long T1 relaxation times.

Goal

This study aims to develop a fast B1 mapping approach for ³¹P at 7T.

Approach

A look-up table approach was adopted to enable B1 mapping at short TR. Fast spiral encoding together with weighted averaging was implemented with a GRE sequence to further accelerate the acquisition.

Results

B1 mapping was validated in phantom and in vivo in human calf muscle and brain within a scan time of 10min.

Impact

The presented fast and accurate B1 mapping correction method is particularly suited for moderate to short repetition times, showing promise for future applications in rapid X-nuclei imaging.