UCL/STIR

Software for Tomographic Image Reconstruction

Stars: 160
Forks: 113
Open beginner issues: 2
Indexed issues: 303
Avg merge: 12d 15h
Merged PRs (30d): 1

Dominant language: C++
License: No license data
Last GitHub push: Sep 8, 2026
Latest indexed: Sep 20, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted

Beginner friendly Everything

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enable self-hosted CUDA runner in CI Open

UCL/STIR#1764 · 1 reaction · 2 assignees · Opened Sep 22, 2026
Remove Scanner::get_default_num_arccorrected_bins() Open

UCL/STIR#1762 · 1 assignee · Opened Sep 21, 2026
Post-conversion sinogram dimensionality. Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

UCL/STIR#1761 · 14 comments · 1 assignee · Opened Sep 18, 2026
ProjDataFrom*::get_sinogram(SinogramIndices&) etc is not accessible Open

UCL/STIR#1759 · 1 assignee · Opened Sep 16, 2026
CI: cache ROOT test files Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

UCL/STIR#1758 · 4 comments · 1 reaction · Opened Sep 13, 2026
Make ProjDataInfoCylindricalNoArcCorr, ProjDataInfoGeneric/Blocks etc hierarchy sensible Open

UCL/STIR#1757 · 1 assignee · Opened Sep 13, 2026
test_KeyParser.cxx warnings on Apple clang version 18.1.8 Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

UCL/STIR#1756 · Opened Sep 13, 2026
occasional segfault in CI for MacOS-conda-latest-compiler Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

UCL/STIR#1754 · Opened Sep 8, 2026
(normally small) z-shift in CListEventScannerWithDiscreteDetectors::get_LOR() vs `ProjDataInfo::get_LOR()` for blocks/generic scanner Open

bug

UCL/STIR#1753 · 1 comment · 1 assignee · Opened Sep 7, 2026
Interfile parsing of BlocksOnCylindrical uses wrong default for axial crystal spacing Open

bug

UCL/STIR#1752 · 1 assignee · Opened Sep 7, 2026
potential problems with even TOF bins and TOF mashing Open

UCL/STIR#1751 · 1 comment · 1 assignee · Opened Sep 6, 2026
reading Siemens compressed sinograms bad user experience Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

UCL/STIR#1750 · Opened Sep 3, 2026
KineticParameters<N> bakes parameter count into the C++ type system, however it should be a runtime property Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

UCL/STIR#1745 · Opened Aug 10, 2026
SWIG 4.5 incompatibilities Open

bug

UCL/STIR#1742 · 1 comment · 1 assignee · Opened Aug 9, 2026
PETSIRD reading clean-up Open

UCL/STIR#1735 · 1 comment · 1 assignee · Opened Aug 1, 2026
Remove CListModeDataBasedOnCoordinateMap? Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

UCL/STIR#1734 · 2 comments · Opened Aug 1, 2026
remove old priors Open

enhancement

UCL/STIR#1730 · 1 assignee · Opened Jul 15, 2026
"trivial" test in test_interpolate_projdata.cxx Open

UCL/STIR#1726 · 1 assignee · Opened Jun 15, 2026
potential speed-up in reading ROOT files Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

UCL/STIR#1722 · Opened May 29, 2026
potential race condition with `ProjDataInfoSubsetByView` Open

bug

UCL/STIR#1720 · 2 comments · 1 assignee · Opened May 28, 2026
surprising conventions used for ProjDataInfoBlocksOnCylindricalNoArcCorr constructor and subsequent problems Open

UCL/STIR#1706 · 1 assignee · Opened May 15, 2026
GHA MacOS clang21 job fails due to openMP not found Open

UCL/STIR#1692 · 1 comment · 1 assignee · Opened Mar 11, 2026
CMake: if STIR_OPENMP=ON (which is now the default), then OpenMP is required Open

UCL/STIR#1691 · 1 assignee · Opened Mar 11, 2026
SAFIR list-mode reading files fails from different directory Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 56/100

UCL/STIR#1680 · Opened Feb 21, 2026
data_processor only applied in forward pass for ParallelProj Projector Open

bug

UCL/STIR#1669 · 1 comment · 1 assignee · Opened Nov 26, 2025
appveyor builds time-out Open

UCL/STIR#1642 · 1 comment · 1 assignee · Opened Oct 22, 2025
Running two subsequent reconstructions with system matrix caching causes memory issues Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

UCL/STIR#1641 · 9 comments · Opened Oct 21, 2025
flexibility in SPECT data and associated difficulties for analytic algorithms Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

UCL/STIR#1635 · 3 comments · Opened Oct 18, 2025
test condition in test_proj_data_info_subsets.cxx is wrong Open

UCL/STIR#1627 · 1 assignee · Opened Oct 7, 2025
Occasional failures in recon_test_pack SRT2D test on MocOS, clang21 and OpenMP Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

UCL/STIR#1626 · 4 comments · Opened Oct 7, 2025
memory failures in test_proj_data_info_subsets with 60 threads or more Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

UCL/STIR#1611 · Opened Sep 7, 2025
`BinNormalisationFromECAT8::read_norm_data` prepends path to full path Open

Difficulty 2/5 1-3 hours Newbie friendliness 52/100

UCL/STIR#1601 · 1 comment · Opened Jul 3, 2025
ProjDataInfoCylindricalNoArcCorr constructor not available in Python? Open

UCL/STIR#1599 · 1 assignee · Opened Jul 1, 2025
doxy2swig relies on pre-existing PYTHON_EXECUTABLE Open

UCL/STIR#1587 · 1 assignee · Opened Apr 8, 2025
SPECTUB seem to set first LOR in each view to empty Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

UCL/STIR#1576 · Opened Mar 16, 2025
suppress HDF5 errors when checking list-mode or proj-data files Open

UCL/STIR#1571 · 1 assignee · Opened Feb 25, 2025
Calling parallelproj forward Segmentation fault (core dumped) for LAFOV Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

UCL/STIR#1567 · 4 comments · Opened Feb 21, 2025
conv_GATE_projdata_to_interfile tool does not exist in stir version 6.2.0 Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

UCL/STIR#1565 · Opened Feb 17, 2025
Interpolate a/b Parameters for ctac_to_mu Conversion Based on keV/kvP Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

UCL/STIR#1564 · Opened Feb 14, 2025
Error in unlisting ROOT file from ECAT PET Gate Simulation Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

UCL/STIR#1561 · Opened Feb 6, 2025
Release mode doesn't run std::isfinite, isnan, isinf etc. Open

UCL/STIR#1555 · 2 comments · 1 assignee · Opened Dec 18, 2024
SPECTUB segfault when using PSF with 0 intercept Open

bug

UCL/STIR#1547 · 1 assignee · Opened Nov 26, 2024
Scatter estimate `upsample_and_fit_scatter_estimate` scale factors should be saved and or written to file Open

enhancement

UCL/STIR#1546 · 2 comments · 1 assignee · Opened Nov 24, 2024
List-mode data from ROOT does not set time frame information Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 48/100

UCL/STIR#1538 · Opened Nov 18, 2024
Artifact (diagonal line/band) Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

UCL/STIR#1529 · Opened Oct 28, 2024
Scatter correction for a single/prompt photon with arbitrary energy Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

UCL/STIR#1526 · Opened Oct 23, 2024
Core dump while trying to access Scanner object created for an unknown scanner Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

UCL/STIR#1520 · 4 comments · Opened Oct 6, 2024
calculate_attenuation_coefficients with NOPMRT option raising error Open

bug

UCL/STIR#1515 · 1 comment · 1 assignee · Opened Sep 21, 2024
ML FanData is limited to an odd number of detectors Open

bug

Difficulty 5/5 Over a week Newbie friendliness 25/100

UCL/STIR#1511 · Opened Sep 12, 2024
Enable TOF support for blocks geometry in SAFIR_genericScanner Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

UCL/STIR#1506 · 7 comments · 1 reaction · Opened Sep 10, 2024

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