Fig. 1

Pipeline of data collection, preprocessing, and model training. MIP and AIP: maximum and average intensity projections, respectively; IGTV: internal gross tumor volume. IGTVAIP−manu and IGTVMIP−manu: manually contoured tumor volumes on AIP and MIP images, respectively, used as inputs for the model. IGTVgt: ground truth IGTV, which is derived from the fusion of GTVs contoured across different breathing phases