The Role of Imaging in Radiation Therapy Planning: Past, Present, and Future
Figure 2
Differences in the soft-tissue contrast from four images. (a) is a T2-weighted MR image, (b) is a T1-weighted MR image, (c) is a T1-weighted MR image with contrast, and (d) is a CT image. The ROIs shown above are eyes (purple and light green colors), optical nerves (green and yellow colors), brain stem (teal color), gross tumor (pink color), and clinical target (yellow color) which extend from the gross tumor by a few millimeters with the intent of treating the subclinical microscopic extension of disease.
