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Prescribing
•
For serial organs, maximum (near‐max) dose is relevant
parameter
ICRU recommends D
2 %
rather than D
Max
(D
0 %
)
O
bl
f d fi i
(k i !) h l
f
vercomes pro em o e n ng now ng w at vo ume o
the structure is important
Note that D
2 %
not validated (yet); caution given !
But it is logical
…
However, effect will depend on total volume of structure
In gynae brachtherapy often use D
2 cm
3