Table 3: Radiation delivery to OARs.

OrganMean IMRT value Mean coplanar 3D-CRT value Mean noncoplanar 3D-CRT value P value
(coplanar versus noncoplanar 3D-CRT)
value
(IMRT versus noncoplanar 3D-CRT)

Right kidney V12 (%)75.575.668.90.030.3
R. kidney V18 (%)45.562.058.40.60.1
Left kidney V12 (%)69.048.341.00.10.001
Left kidney V18 (%)43.235.226.40.040.006
Mean liver dose (Gy)16.520.019.50.10.001
Small bowel V45 (%)7.112.112.80.010.0002
Stomach V45 (%)8.716.615.80.20.007
Max spinal cord dose35.032.035.50.040.8

OAR: organ at risk; IMRT: intensity-modulated radiation Therapy; 3D-CRT: three-dimensional conformal radiation therapy; : volume of an organ receiving Gy.