Figure 1From: Radical stereotactic radiosurgery with real-time tumor motion tracking in the treatment of small peripheral lung tumorsRight upper lobe clinical stage IA NSCLC treatment planning CT (A), planned radiation dose distribution (B: the planning treatment volume is shown in orange and the 30 Gy isodose line in blue), and CT at 6 and 12 months post-treatment (C and D) show progressive fibrosis in the treated volume that ultimately impedes CT evaluation of tumor response.Back to article page