630-631 / 2001
Margins ? ! ?
So margins for ………….
•
microscopic spread ?
Δ CTV definition
•
peri-prostatic extension ?
•
subclinical disease ?
ONE DEFINITION:
C
For prostate brachytherapy the
TV corresponds to the visible contour
of the prostate expanded with a three-dimensional volume expansion
of 3 mm
.
Thi th di
i
l
i
b
t i
d t th t i
t l
s ree- mens ona expans on can e cons ra ne o e an er or rec a
wall (posterior direction) and the bladder neck (cranial direction).
In case of >T2 disease, the macroscopic extracapsular extension in taken
into account when contouring the prostate volume.