. 2014 Jul 10;9:153. doi: 10.1186/1748-717X-9-153

Table 4.

Comparison between IMRT and VMAT for 38 cervical and endometrial plans

	IMRT *(n = 38)*	1A (n = 38)	1Am *(n = 38)*	2A (n = 38)	2Am *(n = 38)*
PTV
D_max (%)	109.9 (106.7 - 113.5)	110.2 (107.4 - 117.3)^b+	111.3 (107.4- 117.3)^ac+	109.3 (106.2 - 115.2)^ab+	109.4 (106.2 - 113.0)^c+
V_95% (%)	96.2 (89.5 - 98.7)	92.6 (86.8 - 96.3)^a+b+	91.9 (83.2 - 96.3)^a+c+	95.2 (90.6 - 98.4)^a+b+	95.2 (89.4 - 98.4)^a+c+
HI	1.09 (1.07 - 1.13)	1.11 (1.09 - 1.16)^a+b+	1.12 (1.09 - 1.18)^a+c+	1.09 (1.07 - 1.13)^b+	1.09 (1.07 - 1.14)^c+
CN	0.77 (0.65 - 0.89)	0.79 (0.65 - 0.86)^b+	0.77 (0.62 - 0.85)^c+	0.83 (0.71 - 0.89)^a+b+	0.83 (0.68 - 0.89)^a+c+
Body
D_mean (Gy)	13.8 (9.1 - 19.3)	13.1 (8.3 - 17.5)^a+	13.2 (8.3 - 17.9)^a+c	13.0 (8.3 - 17.6)^a+b	13.1 (8.3 - 18.2)^a+c
V_5Gy (%)	54.6 (37.4 - 70.6)	55.9 (39.1 - 69.8)^a+b	56.1 (39.2 - 69.6)^a+	56.1 (39.5 - 70.1)^a+	56.1 (39.5 - 70.4)^a+
Rectum
V_{40 Gy} (%)	42.3 (0.1 - 100.0)	43.9 (0.9 - 100.0)	43.7 (0.1 - 100.0)	44.0 (0.3 - 100.0)	43.3 (0.7 - 100.0)
D_max (Gy)	46.9 (41.1 - 49.6)	47.2 (43.8 - 48.8)^b+	47.2 (42.2 - 49.3)^c+	46.8 (41.7 - 48.1)^b+	46.8 (42.0 - 48.7)^c+
Bladder
V_{40 Gy} (%)	44.7 (7.4 - 100.0)	44.2 (8.6 - 100.0)	43.7 (8.4 - 99.6)	43.8 (6.5 - 100.0)	43.5 (9.4 - 100.0)
D_max (Gy)	48.2 (46.3 - 49.6)	47.8 (46.3 - 49.4)^a+b+	48.1 (46.3 - 50.6)^c+	47.3 (44.1 - 48.9)^a+b+	47.4 (44.4 - 49.8)^a+c+
Small Intestine
V_{45 Gy} (ccm)	29.3 (0.0 - 182.8)	30.2 (0.0 - 161.8)	32.7 (0.1 - 185.5)	24.0 (0.0 - 161.4)^a+	25.3 (0.0 - 155.7)^a+
D_mean (Gy)	26.8 (10.9 - 36.4)	28.0 (11.3 - 40.6)	28.0 (11.3 - 38.6)	27.9 (11.0 - 39.4)^a	28.0 (11.0 - 39.5)^a+
MU	701.7 (496–850)	399.7 (324–515)^a+b+	457.6 (322–641)^a+	436.6 (356–590)^a+b+	460.6 (363–621)^a+

Single and double arc plans before (1A, 2A) and after modification (1Am, 2Am) of the optimization penalties; values are expressed as the mean (range).

^ap < 0.05 for Wilcoxon matched-pair signed rank test vs. IMRT; ^bp < 0.05 1A vs. 2A; ^cp < 0.05 1Am vs. 2Am; ⁺p < 0.01.