Table 4.

Summary of dosimetric results in terms of beam delivery efficiency in CyberKnife InCise MLC‐based and cone/Iris‐based plans. Data represent $\text{mean}\pm \text{SD}$ (median). The number of plans for each category are identical to Table 3. Wilcoxon signed‐rank p was below 0.05 for all cases.

	MU		Delivery Time (min)		Number of Beams			Ratio (MLC/cone or Iris)
	Cone/Iris	MLC	Cone/Iris	MLC	Cone/Iris	MLC beam	MLC Segment	MU	Delivery Time (min)
All cases	$21275\pm 10985$	$8971\pm 5489$	$58\pm 18$	$37\pm 12$	$182\pm 85$	$63\pm 34$	$105\pm 64$	$0.42\pm 0.16$	$0.65\pm 0.12$
	(17041)	(9091)	(58)	(36)	(166)	(58)	(86)	(0.40)	(0.66)
single target	$18149\pm 11091$	$6709\pm 3496$	$51\pm 14$	$32\pm 9$	$168\pm 94$	$50\pm 25$	$88\pm 63$	$0.40\pm 0.18$	$0.65\pm 0.14$
	(15178)	(4752)	(51)	(31)	(151)	(36)	(52)	(0.36)	(0.68)
multiple targets	$26832\pm 8777$	$12993\pm 6248$	$72\pm 15$	$46\pm 13$	$207\pm 61$	$86\pm 37$	$135\pm 58$	$0.47\pm 0.10$	$0.64\pm 0.07$
	(26441)	(11727)	(67)	(44)	(202)	(73)	(138)	(0.49)	(0.65)
circular shape	$18355\pm 8115$	$8325\pm 4976$	$56\pm 17$	$36\pm 11$	$168\pm 17$	$61\pm 33$	$94\pm 58$	$0.45\pm 0.16$	$0.66\pm 0.12$
	(16806)	(6572)	(56)	(33)	(56)	(49)	(86)	(0.43)	(0.66)
irregular shape of target or abutting with OARs	$28782\pm 14309$	$10634\pm 6772$	$65\pm 19$	$40\pm 17$	$218\pm 112$	$68\pm 38$	$132\pm 76$	$0.37\pm 0.15$	$0.61\pm 0.11$
	(26442)	(10902)	(62)	(40)	(217)	(65)	(145)	(0.30)	(0.65)
$\text{target volume}\le 1\text{cc}$	$14606\pm 5617$	$6329\pm 3651$	$47\pm 15$	$31\pm 8$	$108\pm 49$	$43\pm 17$	$53\pm 27$	$0.42\pm 0.10$	$0.68\pm 0.13$
	(13280)	(3973)	(46)	(29)	(110)	(37)	(47)	(0.40)	(0.66)
$1\text{cc}<\text{target volume}\le 5\text{cc}$	$22795\pm 11122$	$9671\pm 8267$	$64\pm 21$	$38\pm 18$	$177\pm 65$	$66\pm 49$	$95\pm 67$	$0.37\pm 0.14$	$0.58\pm 0.11$
	(16666)	(4845)	(62)	(32)	(156)	(35)	(53)	(0.30)	(0.61)
$\text{target volume}>5\text{cc}$	$24941\pm 12569$	$10326\pm 4819$	$61\pm 13$	$41\pm 6$	$245\pm 79$	$74\pm 20$	$156\pm 45$	$0.49\pm 0.20$	$0.69\pm 0.11$
	(21632)	(10902)	(62)	(40)	(242)	(65)	(145)	(0.52)	(0.69)

MU = monitor unit; $\text{OAR}=\text{organ at risk}$.