Sequences
Several MPI measurement sequences have been used for data acquisition. The sequence parameters are listed below.
1D Sequence
| Parameter | Value |
|---|---|
| Drive-Field Amplitude | 12 mT x 0 mT x 0 mT |
| Drive-Field Frequency | 2.5 MHz/102 x 2.5 Mhz/96 x 2.5 Mhz/99 |
| Selection-Field Gradient | -1.0 T/m x -1.0 T/m x 2.0 T/m |
| Repetition Time | 40.8 $\mu$s |
| Number of Patches | 19 x 19 |
| Number of Periods per Patches | 1000 |
| Number of Frames | 1 |
During the measurement of the 1D sequence the phantom was moved step-wise in the y-dimension and z-dimension with the robot. The movement was performed first in the z-dimension and then in the y-dimension. Each patch represents one robot position, in total 19x19=361 1D patches/positions.
2D Lissajous Sequence
| Parameter | Value |
|---|---|
| Drive-Field Amplitude | 12 mT x 12 mT x 0 mT |
| Drive-Field Frequency | 2.5 MHz/102 x 2.5 Mhz/96 x 2.5 Mhz/99 |
| Selection-Field Gradient | -1.0 T/m x -1.0 T/m x 2.0 T/m |
| Repetition Time | 652.8 $\mu$s |
| Number of Patches | 19 |
| Number of Periods per Patches | 1000 |
| Number of Frames | 1 |
During the measurement of the 2D sequence the phantom was moved step-wise in z-dimension with the robot. Each patch represents one robot position, in total 19 2D patches/positions.
3D Lissajous Sequence
| Parameter | Value |
|---|---|
| Drive-Field Amplitude | 12 mT x 12 mT x 12 mT |
| Drive-Field Frequency | 2.5 MHz/102 x 2.5 Mhz/96 x 2.5 Mhz/99 |
| Selection-Field Gradient | -1.0 T/m x -1.0 T/m x 2.0 T/m |
| Repetition Time | 21.54 ms |
| Number of Frames | 1000 |