Figure 1
From: Osteosarcoma following single fraction radiation prophylaxis for heterotopic ossification
The original 8 × 15 field was digitally reconstructed and superimposed on a CT scan following the patient’s diagnosis of osteosarcoma, and the treatment plan was subsequently recreated. The region of greatest bony destruction was thought to be the epicenter of the tumor, and was specially contoured on the diagnostic CT scan. The volume appears to be located at the edge of the radiotherapy field, including both areas that received >700 cGy and <100 cGy.