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“Involved-Site” Radiotherapy

Specht et al, IJROBP 2013

• The concept of ISRT was developed on the basis of

the INRT concept

• The irradiated volume is significantly smaller than

with IFRT

• If prechemotherapy imaging is available, but image

fusion with the postchemotherapy planning CT scan is

not possible



ISRT

• If no prechemotherapy imaging is available



IFRT