Technique

Photon Energy allowed

Field Arrangement

Algorithm

3DCRT

6, 10 and 15 MV

Tangential field/Isocentric Gantry angles were selected using the beam’s eye view of the Eclipse treatment planning system, avoiding direct exposure of the contralateral breast; supraclavicular lymph nodes were covered by 3^rd anterior beam ± posterior beam, with a gantry angle chosen to avoid direct exposure of the spinal cord. In large breast field-in-field technique was used to reduce hot spots.

AAA

IMRT

6 MV only

5 - 9 fields (Isocentric, Static with tangential field setup)

VMAT

6 MV only

Two double arcs (clockwise and antic lock wise) to disperse field, abduction of 10˚ - 25˚ by tangent field as starting and ending angle each way, with collimator angle 5˚, treatment couch angle 0˚, maximum dose rate 600 MU/min.