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. Author manuscript; available in PMC: 2017 Apr 1.
Published in final edited form as: Magn Reson Med. 2015 May 14;75(4):1574–1585. doi: 10.1002/mrm.25753

Figure 2.

Figure 2

The proposed spoiled gradient recalled echo (GRE) sequence with 3DPR trajectory, 2D golden means ordering and one-dimensional (1D) self-gating (SG). (a) 4D-MRI imaging sequence showing each SG k-space group (dashed arrow) inserted in the superior-inferior (SI) direction at every segment of 15 radial projections, giving a temporal interval of ~98 ms between each SG group. A total of 73,005 projections were collected with 4867 SG lines after an approximately 8 minute scan. (b) 3D k-space trajectory showing data collection via radial 2D golden means ordering corresponding to (a). Note that the radial lines collected in previous segments are grayed and the SG lines are represented via dashed arrows.