Table 2.

Comparison of cardiac impact between left and right lung tumors. Statistical analysis on correlation between tumor motion and cardiac impact, and the comparison of the cardiac impact to left and right lung tumor ${\mathit{Corr}}_{\mathit{Lat}}$ and ${\mathit{Corr}}_{\mathit{SI}}$ are the correlation coefficients between cardiac impact and the tumor motion. The mean and standard deviation of cardiac impact, correlation coefficient for lateral motion, and correlation coefficient for sup–inf motion were calculated for left and right lungs respectively. The results indicated that the cardiac impact magnitude is different for left and right lungs, but the correlation of cardiac impact to tumor motion is indifferent for left and right lung tumors. Patients who had no correlation between cardiac and tumor motion (7 out of 30) were not included in the table.

Patient	Lobe	Cardiac impact (in mm)	$\text{Cor}{\text{r}}_{\text{Lat}}$	No. of correlation in lateral	$\text{Cor}{\text{r}}_{\text{SI}}$	No. of correlation in sup–inf
All right (n = 13)		0.65 ± 0.45	0.45 ± 0.25	11	0.38 ± 0.13	12
All left (n = 10)		1.20 ± 0.68	0.34 ± 0.23	7	0.51 ± 0.28	8
Left vs. right		p < 0.05	p > 0.05		p > 0.05