https://github.com/marksgraham/spin-echo-possum
Simulate spin-echo sequences in POSSUM
https://github.com/marksgraham/spin-echo-possum
Last synced: 2 months ago
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Simulate spin-echo sequences in POSSUM
- Host: GitHub
- URL: https://github.com/marksgraham/spin-echo-possum
- Owner: marksgraham
- Created: 2017-09-11T14:24:23.000Z (over 7 years ago)
- Default Branch: master
- Last Pushed: 2017-12-08T15:54:35.000Z (over 7 years ago)
- Last Synced: 2025-01-22T15:36:25.556Z (4 months ago)
- Language: C++
- Size: 129 KB
- Stars: 1
- Watchers: 4
- Forks: 0
- Open Issues: 0
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Metadata Files:
- Readme: README.md
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README
This code extends [POSSUM](https://fsl.fmrib.ox.ac.uk/fsl/fslwiki/POSSUM) to enable the simulation of spin-echo pulse sequences.
## Changes from FSL 5.0.10
# pulse.cc
* 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
# possum.cc
* 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
# signal2image.cc
Support for reconstructing the new pulse types (se and se-epi) that can be generated using pulse
# possumfns.cc
Implemented support for 180 RF pulses in the simulation.