Kaining Shi1,2, Russell Low3,
Shanglian Bao1, Jingfei Ma2
1Beijing City Key Lab of Medical Physics
and Engineering, Beijing University, Beijing, China; 2Imaging
Physics, University of Texas MD Anderson Cancer Center, Houston, TX, United
States; 3Sharp and Children's MRI Center, San Diego, CA, United
States
The
triple echo readout in the FTED sequence presents a challenge to achieve
flow-compensation along the frequency-encode direction. In this work, two flow-compensation methods
were proposed. In the first method, gradient
moments are nulled at every RF locations so that the CPMG condition is always
maintained. In the second method, the
spin echo component of the signal is nulled at the 1st and 3rd echo locations
and the stimulated component is minimized at different echo locations. The effectiveness of both methods in
reducing the flow-induced artifacts was examined with a numerical calculation
and demonstrated in a phantom testing.