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- W2008001567 abstract "Abstract This work represents our effort to test feasibility of FDG-based PET/CT on target volume delineation in radiotherapy treatment planning of NSCLC patients. Different methods have been developed to enable more precise target outlining using PET: Qualitative Visual Method, CTV=2.5 SUV units, linear SUV threshold function method, and CTV=40% Iso of Maximum Uptake Value. We are proposing reconstruction of three biological target volumes: necrotic BTV (same as PTV created by radiation oncologist using CT data), proliferating BTV (based on PET signal to background ratio 1:3) and hypoxic BTV (based on PET signal to background ratio of 1:19). Two IMRT plans were created and compared to the conventional treatment plan: “conservative” IMRT plan delivers 52.5 Gy to the necrotic BTV and 65 Gy to the hypoxic BTV; “radical” IMRT plan delivers 30 Gy to necrotic BTV, 52.5 Gy to proliferating BTV and 65 Gy to hypoxic BTV. Use of BTVs in IMRT plans is attractive because it increases dose to targets considered to need higher doses. It reduces considerably dose to heart and spinal cord, organs considered to limit dose escalation approaches in NSCLC treatment. “Conservative” IMRT approach can be understood as a PET/CT-based concomitant boost to the tumor expressing the highest FDG uptake. “Radical” plan implies deviation from the traditional uniform dose target coverage approach, with the intention of achieving better surrounding tissue sparing and ultimately allowing for dose escalation protocols relying on biologically based treatment planning." @default.
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- W2008001567 date "2007-02-01" @default.
- W2008001567 modified "2023-10-01" @default.
- W2008001567 title "Impact of 18FDG-PET/CT on biological target volume (BTV) definition for treatment planning for non-small cell lung cancer patients" @default.
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- W2008001567 doi "https://doi.org/10.1016/j.nima.2006.10.036" @default.
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