Dummy run study for outlining and plan quality of intensity-modulated radiotherapy in elderly patients with newly diagnosed glioblastoma: The Japan clinical oncology group study JCOG1910 (AgedGlio-PIII)

Table 3 Failed outlining scenarios

	GTV	CTV	PTV
Institution A	-	Included the resection cavity in the CTV	-
Institution B	-	Did not consider anatomical barriers	-
Institution C	-	No combination of the resection cavity and GTVprimary	-
Institution D	GTV primary outlining was insufficient	Excluded the brainstem from the CTV during outlining	-
Institution E	-	-	Modified the PTV by excluding the brainstem
Institution F	GTV primary outlining was insufficient	No combination of the resection cavity and GTVprimary	-

GTV, gross tumor volume; CTV, clinical target volume; PTV, planning target volume

ISSN: 1748-717X