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Single vocal cord irradiation. (A) The affected cord is delineated as the clinical target volume (CTV), with 5 mm expansion in all directions to generate the planning target volume (PTV) (red). (B) Single cord irradiation planned with IMRT treatment technique for T1a, right-sided, true vocal cord carcinoma; a 63 Gy prescription was delivered in 28 fractions, with contralateral vocal cord mean dose kept under 30 Gy. Dose color wash distribution.
