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2-D Whole Breast Irradiation
Field description:
– 2 tangential photon beams: medial entering at
midline and lateral entering at the mid-axillary line.
– Exposure of >2-3 cm of the lung should be avoided
– Maximum Heart distance <1cm
Dose schedules
– 50Gy / 25 fractions
– 42Gy / 16 fractions (Canadian Trial)
– 40Gy / 15 fractions (UK START Trial)