In-room imaging and MR planning

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