Table II.

Values of domination comparison between sets of IMRT plans obtained with 900 and 9000-iteration MOEA optimizations using either structure-specific or voxel-specific penalty objectives. In all cases, both w and ${\mathbf{d}}^{\mathit{ref}}$ were varied. Each cell in the table represents the domination comparison values for one set versus the other and the reverse domination.

	Voxel-specific versus structure-specific	Voxel-specific versus structure-specific
	(900 iterations)	(9000 iterations)
Case 1	$16.5\%\rightleftarrows 0.00\%$	$31.7\%\rightleftarrows 0.00\%$
Case 2	$2.68\%\rightleftarrows 0.00\%$	$8.93\%\rightleftarrows 0.15\%$
Case 3	$0.61\%\rightleftarrows 0.24\%$	$1.29\%\rightleftarrows 0.00\%$
Case 4	$0.00\%\rightleftarrows 1.75\%$	$0.00\%\rightleftarrows 0.12\%$