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Cross section assignments
•
Accurate tissue segmentation, sources and
applicators needed: identification (ρ
e
,Z
eff
)
➢
e.g. in breast: adipose and glandular tissue have
significantly different (ρ
e
,Z
eff
); dose will be different
•
If this step is not accurate
➔
incorrect dose
➢
Influences dosimetry and dose outcome studies
➢
Influences dose to organs at risk