Advanced TP

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

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

In gynae brachtherapy often use D 2 cm 3

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