This code extends POSSUM to enable the simulation of spin-echo pulse sequences.
- Two new functions: spinecho and spinechoepi, adding spin-echo pulses to gradient-echo and epi sequences, respectively.
- New pulse types can be called from the command line using --seq se or --seq se-epi
- When reading in the MR parameters (MRpar) a fifth column with T2 values is now expected. I've also slightly updated the T2* values to bring them in line with values from the literature. If a four-column MRpar file is supplied, the program will assume T2=T2*.
Old 3T MRpar:
| T1 | T2* | PD | Shift |
|---|---|---|---|
| 1331e-03 | 75e-03 | 0.86 | 0 |
| 832e-03 | 70e-03 | 0.77 | 0 |
| 3700e-03 | 500e-03 | 1 | 0 |
New 3T MRpar:
| T1 | T2* | PD | Shift | T2 |
|---|---|---|---|---|
| 1331e-03 | 51e-03 | 0.86 | 0 | 75e-03 |
| 832e-03 | 44e-03 | 0.77 | 0 | 70e-03 |
| 3700e-03 | 500e-03 | 1 | 0 | 500e-03 |
Support for reconstructing the new pulse types (se and se-epi) that can be generated using pulse
Implemented support for 180 RF pulses in the simulation.