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. Author manuscript; available in PMC: 2011 Apr 1.
Published in final edited form as: Semin Radiat Oncol. 2010 Apr;20(2):107–115. doi: 10.1016/j.semradonc.2009.11.004

Figure 3.

Figure 3

Methods of measuring breathing motion: cine MR frames (top), 4D CT (upper-middle), online fluoroscopy (lower-middle, right) compared to DRR (left), and 4D CBCT (lower)