Correlation of 2D parameters to lung and heart dose-volume in radiation treatment of breast cancer

Figures & data

Figure 1. a, b. Description of various breast treatment parameters, CLD, CWS and MHD.

Table I. Statistical analysis of breast parameters.

Site	Parameters		n	R^2	R	p	95% CI
Left lung	CLD	V5	44	0.1155	0.3399	0.0240	0.048–0.578
	CLD	V10	44	0.2862	0.5350	0.0002	0.283–0.718
	CLD	V20	44	0.3329	0.5770	0.0001	0.338–0.746
Right lung	CLD	V5	26	0.2228	0.4720	0.0150	0.104–0.727
	CLD	V10	26	0.4007	0.6330	0.0005	0.325–0.819
	CLD	V20	26	0.4529	0.6730	0.0002	0.386–0.841
Heart	MHD	V5	40	0.2209	0.4700	0.0022	0.186–0.682
	MHD	V10	40	0.3058	0.5530	0.0002	0.292–0.737
	MHD	V20	40	0.3102	0.5570	0.0002	0.297–0.74
Breast	CWS	Max Dose	70	0.4186	0.6470	0.0001	0.52–0.784

Figure 2. Correlation of heart dose volume (V5, V10 and V20) to MHD. Data points are from treatment planning and lines are the linear regression with R² values. The p-values are shown in Table I.