Figure 1. A conformal 3-dimensional radiation treatment plan with sagittal, coronal and axial views through the treatment isocenter along with a view of a posterior-anterior (PA) treatment portal for a patient with stage III rectal cancer undergoing neoadjuvant combined modality therapy. Isodose lines representing radiation dose to the “at-risk” regional lymph nodes and pelvic tissues along with higher doses to the areas of gross disease are demonstrated.
