DFM3D

[Dimitra-Kyriakopoulou]

Changes in this pull request

Adding DFM3D, an analytic 3D PET reconstruction algorithm. Also introducing a standalone missing-data filling path for algorithms that do not use STIR’s RelatedViewgrams symmetry-bundle workflow.

Testing performed

Reckon_test_pack test included.

Related issues

Checklist before requesting a review

• [] I have performed a self-review of my code
• [] I have added docstrings/doxygen in line with the guidance in the developer guide
• [] I have implemented unit tests that cover any new or modified functionality (if applicable)
• The code builds and runs on my machine
• [] documentation/release_XXX.md has been updated with any functionality change (if applicable)

Contribution Notes

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• [ x] The content of this Pull Request (the Contribution) is intentionally submitted for inclusion in STIR (the Work) under the terms and conditions of the Apache-2.0 License.
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