Seminal vesicle intrafraction motion 73 Type of major motion component Seen in fractions (%) Seen in proportion of patients (%) Gas pockets 18% 50% Drift 30% 76% Peristalsis 40% 84% Stable 12% 32% Table 1 – Classification of the types of major motion components seen for the intrafraction motion of the seminal vesicles. Figure 3 – Examples of different motions paths. An example for a patient with a gas pocket is shown in black, while an example with drift is shown in green, peristalsis in blue and stable in red. The motion paths for the left seminal vesicle are shown as continues lines, while motion paths for the right seminal vesicle are shown as the dashed lines. 4
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