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25 primary NSCLC tumors,
4 contouring methods:
1 visual, 3 thresholding
correlation of differences with
- SUV
max
- size of lesion
- FDG-Inhomogeneity
GTV
40
54 ml
GTV
bg
95 ml
GTV
2.5
165 ml
GTV
vis
158 ml
0
60
120
180
mean volume (ml)
p=0.0004
p=0.0002
GTV
40
GTV
bg
Nestle JNM 2005
However: the contouring method matters!