Abstract
and 779 cGy (SDZ 1012 cGy) in patients without ET (pZ 0.074). MPD per fraction was 727 cGy (SD Z 466) in patients with ET and 249 cGy (SD Z 255) in patients without ET (pZ 0.035). D5 cc per fraction was 482 cGy (SD Z 397) in patients with ETand 208 cGy in patients without ET (SDZ 265) p Z 0.1216). Table shows the characteristics of the RTOG dose constraints when used to predict toxicity in our patients. Conclusions: Lung SBRT is associated with a low rate of esophagitis but severe toxicity can occur at very high doses. Our study shows that higher maximum point dose and D5 cc are associated with esophageal toxicity. Respecting RTOG constraints has a high NPV for toxicity in our population.
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