Figure 1From: Optimal organ-sparing intensity-modulated radiation therapy (IMRT) regimen for the treatment of locally advanced anal canal carcinoma: a comparison of conventional and IMRT plansDose distributions by treatment arm on the same axial CT slice through both target volumes (PTV1 and PTV2) and the external genitalia in a female patient. This CT slice shows the sparing of the genitalia by the 45 Gy isodose curve in arms B, C, and D as compared with arm A.Back to article page