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The target volume and the boost volume of the leg. The target volume is to receive 59.4 Gy and the boost volume 66.6 Gy.
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After CT scanning, the physician outlined the target volume and prescribed the center region as a boost volume to receive a higher dose of 66.6 Gy while the rest of the target volume was to receive 59.4 Gy at a minimum, as shown in Fig. 1.
Field arrangements with three isocenters for the 3D conformal plan.
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All field borders were matched at the plane of the isocenters and were shifted by 1 cm every other day in order to avoid any hot or cold spots near the field borders as shown in Fig. 2.