Clinical target volume (CTV)

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CTV

The clinical target volume is referred to in Radiotherapy as the Clinical target volume (CTV) and is defined as a contiguous region that, in addition to the gross tumor volume, includes areas in which proliferating tumor cells are suspected, the so-called area of tumor spread. In patients with a Glioblastoma, the resection cavity is usually irradiated with an additional isotropic margin of 2 cm[^1] [^2].

Figure

Gross tumor volume (GTV)
Schematic illustration of the gross tumor volume (GTV). Figure adapted from the publication by Burnet NG et al. 2004.

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