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. 2016 Dec 10;2(1):94–100. doi: 10.1016/j.adro.2016.12.002

Figure 2.

Figure 2

Four actual patients' breathing traces used in the target motions. The amplitudes of motion (measured by 4-dimensional computed tomography imaging) in (A) to (D) were 18.6 mm, 24.0 mm, 12.3 mm, and 12.0 mm, respectively. The blue curve represents the actual motion of the target (spherical ball) in the superior-inferior direction, and the red curve represents the motion of the marker block holder (used for 4-dimensional imaging) in the anterior-posterior direction.