Table 2.

Dosimetric comparability of modified contours versus auto-segmented contours

Structures and Dosimetric Variables	Modified Contours, Mean ± SD	Auto-Segmented Contours, Mean ± SD	Correlation Coefficients*	P-Values†
Heart			0.984
Dmean, Gy	10.81 ± 7.78	10.85 ± 7.84		0.86
V30, %	13 ± 11	14 ± 11	0.983	0.89
Left atrium			0.991
Dmean, Gy	20.71 ± 16.21	20.81 ± 16.07		0.66
Left ventricle			0.994
Dmean, Gy	4.02 ± 7.11	4.02 ± 7.12		0.33
Right atrium			0.951
Dmean, Gy	9.97 ± 10.14	10.83 ± 10.58		0.11
Right ventricle			0.973
Dmean, Gy	5.03 ± 6.15	5.02 ± 6.08		0.24
Superior vena cava			0.936
Dmax, Gy	74.04 ± 17.06	74.19 ± 17.04		0.14
Inferior vena cava			0.856
Dmax, Gy	6.97 ± 15.84	7.91 ± 16.74		0.20
Pulmonary artery			0.930
Dmax, Gy	80.75 ± 7.60	80.39 ± 7.47		0.08
Pulmonary vein			0.791
Dmax, Gy	78.11 ± 13.24	76.44 ± 14.23		0.01
Descending aorta			0.956
Dmax, Gy	63.41 ± 21.38	62.41 ± 21.68		0.18
Ascending aorta			0.992
Dmax, Gy	10.81 ± 7.78	10.85 ± 7.84		0.86

Abbreviations: V30, percentage volume receiveing dose ≥ 30 Gy; SD, standard deviation

^*From Pearson’s correlation coefficient (normally distributed data) or Spearman’s rank correlation coefficient (non-normally distributed data).

^†From paired Student’s t-tests (normally distributed data) or Wilcoxon signed-rank test (non-normally distributed data).