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Effect of energy in IMRT planning
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6 MV, 10MV, 18MV
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sharp gradients can only be created using the beam penumbra
so, 6 MV often results in the best plan, in terms of OAR sparing
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however, the volume treated with low dose differs a lot between
different energies
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6 MV in pelvic region??
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combination of different energies is a good option
(computer based choice?)