Table 1.

Target volumes and treatment techniques of the patient cohort

Treatment concept	WBI	PBI	–
Patients, n	27	3	–
CTV range, cm3	136–1359	8–73
Treatment techniques	3DCRT	IMRT	VMAT
Patients, n	3	23	4
Patients with boost, n	10	10	0
Beam modulation	Wedge	Up to 4 segments	1–2 arcs
Average (range) of MUs	390 (210–713)	260 (204–588)	524 (417–600)

WBI whole breast irradiation, PBI partial breast irradiation, 3DCRT 3D conformal radiotherapy, IMRT intensity modulated radiotherapy, VMAT volumetric modulated arc therapy, MU monitor unit, CTV clinical target volume