Bjørn Naume MD
Recently updated 07.07.2014
Oslo University Hospital
|Target volume definitions in accordance with ICRU |
(International Commission on Radiation Units and Measurements)
|GTV (=Gross Tumor Volume)
Palpable or visible/identifiable spread of malignant growth.
|CTV (=Clinical Target Volume)
Tissue volume containing GTV and subclinical microscopic malignant disease.
|ITV (=Internal Target Volume)
Volume containing CTV and an internal margin taking into account internal movements and changes in CTV. This is the volume that should receive an optimal dose.
|PTV (=Planning Target Volume)
||Geometric volume containing ITV and one set-up margin taking into account patient movement, patient positioning, and field modeling.|
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