PET and MRI guided adaptive radiotherapy: Rational, feasibility and benefit

Sébastien Thureau (1) , Aurélien Briens (2) , Pierre Decazes (3) , J. Castelli (4) , Anais Barateau (4) , R Garcia (5) , Juliette Thariat (6) , Renaud de Crevoisier (4)

1 QuantIF-LITIS - Equipe Quantification en Imagerie Fonctionnelle
2 CRLCC - CRLCC Eugène Marquis
3 LITIS - Laboratoire d'Informatique, de Traitement de l'Information et des Systèmes
4 LTSI - Laboratoire Traitement du Signal et de l'Image
5 Institut Sainte Catherine [Avignon]
6 LPCC - Laboratoire de physique corpusculaire de Caen

Adaptive radiotherapy (ART) corresponds to various replanning strategies aiming to correct for anatomical variations occurring during the course of radiotherapy. The goal of the article was to report the rational, feasibility and benefit of using PET and/or MRI to guide this ART strategy in various tumor localizations. The anatomical modifications defined by scanner taking into account tumour mobility and volume variation are not always sufficient to optimise treatment. The contribution of functional imaging by PET or the precision of soft tissue by MRI makes it possible to consider optimized ART. Today, the most important data for both PET and MRI are for lung, head and neck, cervical and prostate cancers. PET and MRI guided ART appears feasible and safe, however in a very limited clinical experience. Phase I/II studies should be therefore performed, before proposing cost-effectiveness comparisons in randomized trials and before using the approach in routine practice.

Keywords: PET; Radiothérapie adaptive; MRI; IMR; ART; TEP

Domains: Bioengineering

Sébastien Thureau, Aurélien Briens, Pierre Decazes, J. Castelli, Anais Barateau, et al.. PET and MRI guided adaptive radiotherapy: Rational, feasibility and benefit. Cancer/Radiothérapie, 2020, 24 (6-7), pp.635-644. ⟨10.1016/j.canrad.2020.06.017⟩. ⟨hal-02929625⟩