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Estimation of Radiotherapy Dose Fields from a Few Projections: How Many Projections will Ensure Uniqueness?

Odran Pivot 1 Rolf Clackdoyle 1 Simon Rit 2 Laurent Desbat 1
1 TIMC-GMCAO - Gestes Medico-chirurgicaux Assistés par Ordinateur
TIMC - Translational Innovation in Medicine and Complexity / Recherche Translationnelle et Innovation en Médecine et Complexité - UMR 5525
2 Imagerie Tomographique et Radiothérapie
CREATIS - Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé
Abstract : The cross-section of the dose field generated by a linac with multi-leaf collimators (MLC) can be examined using scintillating fiber technology to obtain a few parallel projections of this (nearly) binary image. We examine ambiguity of the reconstructions when using only six projections, and demonstrate that unique solutions cannot be ensured. We suggest alternative approaches or conditions on the MLC configuration that would restore unicity.
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https://hal.archives-ouvertes.fr/hal-03344335
Contributor : Simon Rit Connect in order to contact the contributor
Submitted on : Wednesday, September 15, 2021 - 4:20:30 PM
Last modification on : Tuesday, October 19, 2021 - 11:06:02 AM

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Odran Pivot, Rolf Clackdoyle, Simon Rit, Laurent Desbat. Estimation of Radiotherapy Dose Fields from a Few Projections: How Many Projections will Ensure Uniqueness?. 2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), Oct 2020, Boston (virtual), United States. pp.1-4, ⟨10.1109/NSS/MIC42677.2020.9507859⟩. ⟨hal-03344335⟩

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