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Dose distributions of (A) the 3D-CRT and (B) IMRT plans (breast CTV = semi-lucent red area; heart = semi-lucent pale green area; yellow line = 50 Gy; yellowish green line = 47.5 Gy; blue line = 45 Gy; navy line = 40 Gy; green line = 25 Gy). 3D-CRT = 3-dimensional conformal radiotherapy, CTV = clinical target volume, IMRT = intensity-modulated radiotherapy.
