Course book Advanced Treatment Planning 2018

Prescribing

• For serial organs, maximum (near-max) dose is relevant parameter ➢ ICRU recommends D 2 % rather than D Max (D 0 % ) ➢

Overcomes problem of defining (knowing!) what volume of the structure is important

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Note that D

2 % not validated (yet); caution given !

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But … it is logical

➢ However, effect will depend on total volume of structure

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In gynae brachtherapy often use D 2 cm 3