30-31 / 1152
Impact of MRI on target definition
Inter-observer variation
Delineation of nasopharynx tumor
Left: CT, with MRI available, not fused
Right: CT, with fused MRI
Significant differences in
delineation of prostate on CT
and MRI
Rasch et al. 2005; Semin. Radiat. Oncol. 15:136-145