Table 1.

Summary of image-derived tumor motion. Lateral and longitudinal tumor motion in 4DCT and fluoroscopy (first and second row); Lung and heart impact (third and fourth row); and the correlation between heart motion and the tumor motion (high frequency component). The tumor motion amplitude in 4DCT ranged from 0.2 to 3.8 mm in lateral, and 0.2 to 16.7 mm in longitudinal direction; the tumor motion amplitude in fluoroscopy ranged from 0.5 to 4.3 mm in lateral, and 0.3 to 14.5 mm in longitudinal direction; the respiration-induced tumor motion amplitude ranged from 0.2 to 3.9 mm in lateral, and 0.1 to 14.5 mm in longitudinal direction; and the heart-induced tumor motion amplitude ranged from 0.2 to 1.6 mm in lateral, and 0.2 to 2.6 mm in longitudinal direction.

Empty Cell	Empty Cell	Lat. motion	Lng. motion
4DCT	Mean (mm)	1.43	4.52
	standard deviation (mm)	0.72	4.41
Fluoroscopy	Mean (mm)	1.84	4.38
	standard deviation (mm)	1.16	4.39
Lung impact	Mean (mm)	1.42	3.60
	standard deviation (mm)	1.09	3.55
Heart impact	Mean (mm)	0.52	0.82
	standard deviation (mm)	0.31	0.65
Correlation between heart and tumor motion	Mean	0.48	0.48
	standard deviation	0.22	0.18