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Dose–volume parameters for target volume and normal organs in patients treated with IMRT and PBSPT. Data are presented as the median, interquartile range. Abbreviations: IMRT, intensity-modulated radiation therapy; PBSPT, pencil beam scanning proton therapy; GyE, gray equivalent; CTV, clinical target volume; PTV, planning target volume; VXX%, volume receiving XX% of the prescription dose; VXXGyE, volume receiving more than XX Gy; Dmean, mean dose; Dmax, maximum dose.
