. Author manuscript; available in PMC: 2009 Nov 15.

Published in final edited form as: Int J Radiat Oncol Biol Phys. 2008 Sep 25;72(4):1250–1258. doi: 10.1016/j.ijrobp.2008.06.1937

Table 5.

Correlations between the magnitude of artifact in the diaphragm and the abdominal displacement difference between two adjacent couch positions

Artifact magnitude	Difference of abdominal displacement	R	p
Absolute	Absolute	0.34	< 0.01
	Relative to maximum displacement	0.19	0.10
	Relative to mean displacement	0.23	0.04
	Relative to SD of displacement	0.09	0.41
Relative to diaphragm motion	Absolute	0.29	0.01
	Relative to maximum displacement	0.16	0.16
	Relative to mean displacement	0.24	0.04
	Relative to SD of displacement	0.12	0.29