Radiotherapy of large target volumes in Hodgkin's lymphoma: normal tissue sparing capability of forward IMRT versus conventional techniques

Table 3 Mean dosimetric parameters and 95% confidence interval for PTV

Parameter	AP-PA	FPIMRT	p-value	IMRT plan Goodman *et al*.[13]
D_min (%)	77 (75-79)	79 (77-82)	n.s.	76
D_max (%)	118 (115-120)	111 (109-113)	< 10^-4	120
D_mean (%)	105 (104-105)	101 (100-102)	< 10^-4	107
V95 (%)	95.9 (95.1-96.8)	96.8 (96.1-97.5)	0.05	98
IC	0.40 (0.37-0.42)	0.31 (0.29-0.34)	0.0002	-

Abbreviations: AP-PA = parallel opposed technique; FPIMRT = forward planned intensity modulated radiation therapy technique; D_min = minimal dose, D_max, = maximal dose; D_mean = mean dose; IC = inhomogeneity coefficient, V95 = percent of PTV volume within 95% isodose, n.s. = not significant.

ISSN: 1748-717X