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Table 2 Plan summary comparison of IMRT and 3DCRT plans: median value (range)

From: Intensity modulated radiation therapy (IMRT): differences in target volumes and improvement in clinically relevant doses to small bowel in rectal carcinoma

Parameter IMRT 3FBB 3DCRT
MU/fraction 786 (730 - 950) 238 (224 - 272) 242 (232 - 276)
Dmax (Gy) 48.8 (48.4 - 49.4) 48.8 (48.1 - 51.0) 48.2 (47.8 - 49.2)†
Integral dose 2.74 (2.39 - 4.03) 2.56 (2.15 - 3.60) 2.86 (2.49 - 4.12)†
(Gy*cm3*10-5)    
  1. Abbreviations: MU = monitor units; IMRT = intensity modulated radiation therapy; 3FBB = 3 field belly board; 3DCRT = 3 dimensional conformal radiation therapy;denotes statistically significant difference with IMRT as comparator, p < 0.05 (*) or p < 0.01 (); otherwise, not statistically significant.