Shi Cheng1, Kun Zhou1, Wei Liu1, and Dehe Weng1
1Siemens Shenzhen Magnetic Resonance Ltd., Shenzhen, China
1Siemens Shenzhen Magnetic Resonance Ltd., Shenzhen, China
An imaging method utilizing two pairs of fast-switching bipolar readout gradients and partially-opposed-phase and in-phase Dixon (CETD) is proposed to further reduce dead time. The novel steps in joint reconstruction of the two pairs ensure the consistency of water-fat separation.
Figure 1. The diagram in one echo spacing of the TSE Dixon
method (a) and proposed combined echo two-points Dixon sequence (b). The dead
time is marked with diagonal stripes, where no data sampling happens. In the
proposed method, the dead time is reduced. Note that E1 and E4 are partially
opp-phase echoes, while E2 and E3 are partially in-phase echoes.
Figure 4. Water images of a volunteer acquired with product TSE
Dixon (left) and combined echo two-points Dixon (right). SNR and image quality
are comparable.