Table 6.

Doses measured with a thermoluminescent dosimeter (TLD) in the thorax section of the Rando phantom ^a as compared with calculations by the Eclipse ^b analytical anisotropic algorithm (AAA)

		AAA		Pinnacle3
TLD location (Fig. 6)	Measured dose c (Gy)	Calculated dose (Gy)	%Diff d	Calculated dose (Gy)	%Diff d
1	$2.59\pm 2.2$	2.67	$-3.0$	2.63	$-1.2$
2	$2.57\pm 0.8$	2.63	$-2.3$	2.58	$-0.4$
3	$2.62\pm 1.8$	2.67	$-1.9$	2.58	1.8
4	$2.40\pm 1.7$	2.47	$-3.0$	2.46	$-2.5$
5	$2.24\pm 0.7$	2.29	$-2.2$	2.28	$-1.6$
6	$2.23\pm 0.4$	2.30	$-2.8$	2.24	$-0.3$
7	$1.98\pm 2.1$	2.00	$-0.5$	1.98	0.2
8	$2.10\pm 6.3$	2.20	$-5.0$	2.15	$-2.6$
9	$1.90\pm 1.8$	1.96	$-2.9$	1.89	0.5
10	$1.60\pm 2.4$	1.58	$-1.5$	1.57	2.0
11	$1.70\pm 1.3$	1.70	$-0.5$	1.67	2.3
12	$1.44\pm 2.8$	1.52	$-5.2$	1.45	$-0.6$
Mean difference			$-2.2$		$-0.2$
Maximum difference			$-5.2$		$-2.6$

^aThe Phantom Laboratory, Salem, NY.

^bVarian Medical Systems, Palo Alto, CA.

^cStandard deviation of three measurements.

^dDifferences are expressed as a percentage of the measured dose.