Table 2.

treatment characteristics

	re-irradiation	range	primary irradiation	range
patient number	16		87
median dose (GyE/Gy)
C12	44.7		23.9	17.4 - 24.4
IMRT	48.8		49.3	47 - 56.3
total dose	44.9	36.2 - 72.7	73.2	69.9 - 75.3
C12
IMPT	5		17
SBO	10		70
# of fractions	15	8 - 20	8	6 - 8
IMRT
step& shoot IMRT	1			81
Tomotherapy	0			6
treatment volumes (ml)
CTV1	55.2	9.2 - 178.7	128.6	32.6 - 468.6
CTV2	221.2	108.6 - 333.8	368.0	100.2 - 1246.8
prior RT
prior C12-irradiation	6 pts
median prior dose (GyE/Gy)	70	50 - 72
median re-RT dose (GyE/Gy)	44.9	36.2 - 72.7
median cumulative dose (GyE/Gy)	113	59 - 133
time interval (months)	66	16 - 266