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Observation of Motion
Tumor motion varies widely (0-50 mm)
12 mm on average in CC direction
2 mm on average in AP and LR direction
The tumor position in the exhale phase is more stable than the tumor position in the
inhale phase
Seppenwoolde et al. Int. J. Radiation Oncology Biol. Phys., Vol. 53, No. 4, pp. 822–834, 2002
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