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. 2015 Jul 9;10(7):e0131945. doi: 10.1371/journal.pone.0131945

Fig 3. Breath-hold CT and CBCT (spotlight) matching with three fiducial markers in the left lower lobe of the lung, just prior to SBRT treatment.

Fig 3

Panel A shows CBCT completely overlaid onto the planning CT images. Panel B-C shows the two-way sliding window matching between CBCT and planning CT images.