960 / 1363
Contouring
•
Segmentation may not result in useful tumor
definitions because of
–
Noise
–
Tracer uptake inhomogeneities (tumour+ backgr.)
–
Sometimes low tumour-to-background ratios
•
This also causes inter-method variability
•
Segmented VOIs must be checked visually
+ Eur J Nucl Med Mol Imaging. 2011;38(12):2136–44