Abstract #4331
Tailored RF pulse design method for CPMG sequences
Shaihan J Malik 1 and Joseph V Hajnal 1,2
1
Division of Imaging Sciences and Biomedical
Engineering, Kings College London, London, London,
United Kingdom,
2
Centre
for the Developing Brain, Kings College London, London,
United Kingdom
In fast spin echo (FSE) sequences pathways that meet the
CPMG condition (90 phase between excited magnetization
and refocusing pulses) are sustained, whereas non-CPMG
pathways die away. We explore the suppression of non-CPMG
pathways as an additional design flexibility for
localized excitation pulses for inner-volume 3D-FSE
imaging. The RF design problem is reformulated by
splitting real and imaginary components and then a
weighted optimization is used to unevenly distribute
error to the non-CPMG channel. The approach is tested by
designing multi-dimensional localized excitation pulses
for a 3D-FSE imaging sequence and is shown to reduce
excitation error and preserve background suppression.
This abstract and the presentation materials are available to members only;
a login is required.
Join Here
