Table 3.

Normalized root mean square differences (NRMSDs) evaluated for HART extracted cumulative dose‐volume histogram (cDVH) data points utilizing interpolation and optimal polynomial fitting techniques for five head and neck cancer patients.

Structures or targets	Number of data points plotted in:		Percentage NRMSD values in:
	cDVH curves	high dose gradients	interpolation	polynomial fit
PTV1	501	45‐50	$1.2\pm 0.2$	$0.6\pm 0.1$
PTV2	501	47‐52	$1.2\pm 0.2$	$0.6\pm 0.1$
PTV3	501	46‐54	$0.5\pm 0.1$	$0.5\pm 0.1$