Fig. 1
From: Treatment outcomes of passive scattering proton beam therapy for stage I non-small cell lung cancer
Examples of treated cases and an illustration of the PBT dose prescription. a Sarcomatoid carcinoma of the lung in the right lower lobe treated with 60 CGE in 4 fractions (BED10 of 150 CGE [intended dose regimen]), b Centrally located squamous cell carcinoma which close to the heart and the descending aorta, and was treated with 70 CGE in 10 fractions ( BED10 of 119 CGE [one of the sequentially modified dose regimens]), c Finalized prescription doses illustrated according to tumor location; doses are shown in biologically effective dose using α/β ratios of 10 and 3; numbers in parentheses represent treated cases. PBT, proton beam therapy; BED, biologically effective dose; CGE, cobalt Gray equivalents