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Hi <span style="color: rgb(0, 0, 0); orphans: 2; white-space: pre-wrap; widows: 2;" class="">Theodoros</span>
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<div class="">There is a PR for STIR that does allow for the use of more geometries than cylindrical, see #577 <a href="https://github.com/UCL/STIR/pull/577" class="">https://github.com/UCL/STIR/pull/577</a> . I believe there are still some bugs but it is mostly
complete.</div>
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<div class="">Regards,</div>
<div class="">Robert Twyman</div>
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