Table 3.

Treatment characteristics

		N = 44	Percent
RT Technique
Photon		28	66
3-D conformal RT		8	18.2
IMRT		20	45.5
Particle		16	36.4
Protons		15	34
Carbon ion		1	2.3
Prescribed total dose (Gy/ Gy (RBE))
Median (Range, IQR)		54	39.6–66, 50–60
< 50		5	11
≥ 50		24	55
≥ 60		15	34
Single dose
Proton	1.8 Gy/ Gy (RBE)	14	31.8
Photon	2 Gy/ Gy (RBE)	29	65.9
Carbon ion	3 Gy (RBE)	1	2.3
Volume reduction (percutaneous boost)		4	9.1
Intraoperative electron radiation therapy (IOERT) boost
	12 Gy	4	8.4
Planning target volume (ml)
	Median (range, IQR)	967.06	(84–4364, 447–1988)
	Missing	1	2.3
Premature discontinuation of RT		4	9.1