Table 3.

Tracking results for the M1S1 cases with the LEDs on the Phantom+. Motion parameters for each case are provided in Table 2. The average number of images per respiration is dependent on planning parameters such as the gantry rotation period and the number of kV images per rotation.

	Average # of kV images per respiration	δRMS (mm)	δ95% (mm)	δ50% (mm)
Lung 1	1.6	0.4	0.6	0.3
Lung 2	0.6	0.7	1.4	0.5
Lung 3	0.6	0.6	1.1	0.5
Lung 4	1.6	0.6	1.1	0.4
Lung 5	1.6	0.3	0.3	0.1
Liver 1	1.3	0.4	0.6	0.3
Liver 2	0.8	1.5	2.9	1.1
Liver 3	0.5	0.6	1.1	0.4
Liver 4	0.4	0.8	1.6	0.5
Pancreas 1	0.6	1.1	1.7	0.3
Pancreas 2	1.2	1.0	1.8	0.8
Pancreas 3	0.9	0.5	0.9	0.3
Pancreas 4	0.7	0.5	1.0	0.4