Comments (1)
With the merge of #24 correcting the crystal material, I have centered the single voxel source and obtain the following numbers from 10 second GATE simulations.
Tree | D690 | mMR | Ratio (mMR/D690) |
---|---|---|---|
Hits | 58.9k | 113k | 1.92 |
Single Readout | 40.7k | 61.8k | 1.52 |
Singles | 16.6k | 40.1k | 2.42 |
Coincidences* | 3869 | 11k | 2.84 |
Few counts in the mMR compared to previous as the single voxel actually was two voxels (yet constant between the previous scanner evaluations).
Based upon some back of the envelop calculations, the mMR should measure 2.18x more Singles
, produced by the central point source, than the D690 due to scanner geometry.
Additional notes. The SinglesReadout
tree in the root files corresponds to the unblured and unthresholded singles. the Singles
tree is the filtered and blurred single events.
Therefore, for the most part the geometry and crystals seem to make sense in terms of relative measured counts. Future tests should aim use a line source, such as those used in:
mMR: 13.3 cps/kBq from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4766138/
D690: 7.5cps/kBq from http://dx.doi.org/10.1118/1.3635220
#14 (comment)
from stir-gate-connection.
Related Issues (20)
- estimation of normalisation factors will fail for D690 HOT 24
- EstimateSTIRGATENorm mistakenly adds 1s to the normalisation sinogram
- RandomsEstimate problems
- ComputePoissonDataCorrections script requires flip in z of attenuation map from GATE HOT 2
- Computation of the multiplicative factors
- Proposal for a general corrections script to compute all corrections for reconstruction HOT 2
- ComputePoissonDataCorrections will fail if not called from `VoxelisedSimulation` directory HOT 1
- Scripts are depenant on running from SGC VoxelisedSimulation directory HOT 5
- source this_SGC.sh from a different directory issue
- Example/Debugging unlisting scripts for demonstrating the exclusion of different types of events
- Limit unlisting to a particular number of events.
- Combining many ROOT files using `hadd` can exeed the (default) 100GB limit HOT 1
- Something wrong with the script ExampleSTIR-GATE.sh HOT 12
- Example GATE geometries may not be compatable with STIR 5.0.1 due to rotation/offset changes
- about norm factors of mMR HOT 2
- Example mMR geometry may be out of date?
- STIR ray tracing parameters restrict to cylindrical fov HOT 1
- Add a Citation.cff file
- the unit of reconstructed image HOT 3
- Mistakes in `ComputePoissonDataCorrections.sh` documentation HOT 1
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from stir-gate-connection.