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Figure 4: Average intensity projection images in axial (a), sagittal (b), and coronal (c) planes of device based (DB) method with the reconstructed ITVDB (red color) and device less (DL) method ITVDL(green color) copied to the opposite image for comparison. The target motion at CIRS phantom was inferior-superior = 15, anterior-posterior = 5 and left-right = 5 mm ITVDB- Internal target volume determined by DB method, ITVDL- Internal target volume determined by DL method

Figure 4: Average intensity projection images in axial (a), sagittal (b), and coronal (c) planes of device based (DB) method with the reconstructed ITV<sub>DB </sub>(red color) and device less (DL) method ITV<sub>DL</sub>(green color) copied to the opposite image for comparison. The target motion at CIRS phantom was inferior-superior = 15, anterior-posterior = 5 and left-right = 5 mm ITV<sub>DB</sub>- Internal target volume determined by DB method, ITV<sub>DL</sub>- Internal target volume determined by DL method