Table 1.
Axial Spiral | Oblique EPI | 3D Cones | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
x | y | Overall | x | y | z | Overall | x | y | z | Overall | |
Signa Excite | |||||||||||
Original | 0.83 | 0.80 | 1.28 | 0.76 | 0.55 | 0.30 | 1.04 | 0.64 | 0.64 | 0.18 | 1.02 |
Average Delay | 0.21 | 0.14 | 0.28 | 0.24 | 0.12 | 0.12 | 0.33 | 0.10 | 0.09 | 0.10 | 0.19 |
LTI (triangle) | 0.13 | 0.05 | 0.15 | 0.25 | 0.10 | 0.08 | 0.31 | 0.10 | 0.06 | 0.04 | 0.14 |
LTI Delay (chirp) | 0.21 | 0.14 | 0.27 | 0.23 | 0.12 | 0.13 | 0.34 | 0.10 | 0.08 | 0.09 | 0.18 |
LTI (chirp) | 0.09 | 0.04 | 0.10 | 0.20 | 0.05 | 0.09 | 0.24 | 0.07 | 0.05 | 0.04 | 0.11 |
Signa HDxt | |||||||||||
Original | 0.83 | 0.74 | 1.21 | 0.70 | 0.50 | 0.21 | 0.93 | 0.72 | 0.62 | 0.17 | 1.06 |
Average Delay | 0.14 | 0.15 | 0.22 | 0.14 | 0.11 | 0.09 | 0.23 | 0.11 | 0.08 | 0.08 | 0.18 |
LTI (triangle) | 0.38 | 0.19 | 0.45 | 0.28 | 0.16 | 0.16 | 0.39 | 0.33 | 0.13 | 0.09 | 0.40 |
LTI Delay (chirp) | 0.14 | 0.14 | 0.21 | 0.15 | 0.11 | 0.09 | 0.23 | 0.09 | 0.07 | 0.08 | 0.16 |
LTI (chirp) | 0.08 | 0.04 | 0.09 | 0.08 | 0.09 | 0.09 | 0.19 | 0.08 | 0.04 | 0.04 | 0.12 |
Values are in units of 1/FOV. The overall error is calculated in 2D k-space for the spiral and EPI trajectories and 3D k-space for the 3D cones trajectory.