Purpose: To investigate the feasibility of a stereotactic single high dose irradiation of lung tumors under respiratory gating and the clinical response.
Methods and materials: Twenty-three malignant lung tumors less than 40mm in diameter were treated by a single fractional irradiation.
Results and discussion: Local regrowth was seen in three of ten tumors irradiated less than 30Gy, the minimal dose. Only one regrowth was observed in the tumors treated by 30Gy of with a follow up length of 3-24 months. Apparently 30Gy is able to control the lung tumors with a diameter less than 40mm.