Plasma miRNAs Predict Radiosensitivity of Different Fractionation Regimes in Palliative Radiotherapy for Advanced Non-small Cell Lung Cancer：Multicenter Controlled Study.(RadmiR-01)

The patient in supine position with hands catch the plate column by crossing the head, and body fixed by vacuum mould. An enhanced 4DCT scan is conducted with a layer thickness and a distance each of 5 mm. the imaging information is input into the Eclipse program system,the gross tumor volume of the primary tumor (GTVt) and pathological lymph nodes (GTVn) are delineated,GTV is expanded in all 3D direction to create PGTV by 5mm margin for squamous cell carcinoma, or an 8mm margin for adenocarcinoma.Radiaion therapy is delivered by 5F-IMRT.For conventional fractionated radiotherapy,the prescribed dose covering 95% of PGTV is 60Gy/30F/6W.For hyperfractionated radiotherapy,the prescribed dose covering 95% of PGTV is 50Gy/11F/2W.lung V20 \<25%, lung V30 \<18%, spinal cord \<36 Gy.