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Reconstructed lung cancer patient 2–4 at phase 0 (end-inspiration) at sagittal views by using 4 different reconstruction algorithms. FDK: Feldkamp–Davis–Kress; TV: total variation. SMEIR: simultaneous motion estimation and image reconstruction. First through third columns show patient 2, patient 3, and patient 4, respectively. Display window for all images is [0, 0.12] mm−1.
