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Updated: Jun 19, 2026

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Comparison between CT- and FDG-PET-defined target volumes for radiotherapy planning in head-and-neck cancers
Bénédicte Henriques de Figueiredo1, Olivier Barret, Hélène Demeaux
1Department of Nuclear Medicine, CHRU Bordeaux, France. henriques_fr@yahoo.fr
Abstract:
Nine patients with head-and-neck cancer underwent computerized tomography (CT) simulation and [(18)F]-fluorodeoxyglucose positron emission tomography (FDG-PET) to compare the radiotherapy target volumes. The PET volumes were delineated with an automatic segmentation based on the source-to-background ratio. The volume comparison showed a reduction and qualitative discrepancies between the PET- and CT-volumes.
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