Stereotactic ablative radiotherapy (SABR) has become an established treatment option for medicallyinoperable early-stage (Stage I-IIA) non-small cell lung cancer (ES-NSCLC). SABR is able to obtain high rates of local control with low rates of symptomatic toxicity in this patient population. | Assessment of precision irradiation in early non-small cell lung cancer and interstitial lung disease ASPIRE-ILD Study protocol for a phase II trial