Determination of Acquisition Frequency for Intrafractional Motion of Pancreas in CyberKnife Radiotherapy

Figure 2

Patterns of pancreas movement: (a) stable positioning at baseline; (b) dropping down; (c) transient excursion; (d) persistent excursion; (e) high-frequency excursions; (f) intermittent vibration; (g) radon movement; (h) and LR moving (red: SI direction; green: LR direction; blue: AP direction; and black: length).

(a)

(b)

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(e)

(f)

(g)

(h)