Two years experience with quality assurance protocol for patient related Rapid Arc treatment plan verification using a two dimensional ionization chamber array

Table 1 Results.

region	number of monitor units	Treatment time [sec]	passing rate	PTV [ml]	field size cm
head	341 ± 221	0.99 ± 0.12	99.88 ± 0.19	388.2 ± 539.6	14.7 ± 5.5
head and neck	191 ± 102	0.85 ± 0.01	99.80 ± 0.39	477.8 ± 429.8	20.1 ± 4.8
prostate	300 ± 123	1.00 ± 0.06	99.54 ± 0.21	717.2 ± 617.5	15.6 ± 4.9
abdomen	231 ± 28	0.92 ± 0.05	99.76 ± 0.32	1032.6 ± 500.8	20.7 ± 2.3
range
head	118 - 1717	0.78 - 1.09	99.11 - 100.00	7.9 - 1895.0	7.0 - 24.0
head and neck	118 - 693	0.84 - 0.85	97.04 - 100.00	22.3 - 1916.3	7.0 - 24.0
prostate	129 - 906	0.91 - 1.08	98.84 - 100.00	37.6 - 3559.8	7.2 - 24.0
abdomen	195 - 274	0.89 - 0.96	99.15 - 100.00	894.5 - 2140.6	19.0 - 24.0

The columns show (left to right) the region of the localization of the PTV, the mean MU used for the treatment and its standard deviation, the mean treatment time per arc and its standard deviation, the mean passing rate and its standard deviation, the mean volume of the PTV and its standard deviation, and the mean field size by jaws and its standard deviation. The first three rows give the mean results for the different regions. The last three rows show the range of each region.

ISSN: 1748-717X