TABLE IV.

Imaging dose data for the Varian OBI system. Measurements were acquired for the full trajectory Pelvis protocol, full trajectory Thorax protocol, and half trajectory Spotlight protocol.

Varian OBI
		Pelvis		Thorax		Spotlight
			Additional 4 cm	Nominal	Additional 4 cm		Additional 4 cm
Location		Nominal thickness(cGy)	diameter (cGy)	thickness(cGy)	diameter (cGy)	Nominal thickness(cGy)	diameter (cGy)
Interior	Anterior	2.73 ± 0.11	1.91 ± 0.08	0.66 ± 0.03	0.48 ± 0.02	0.92 ± 0.04	0.78 ± 0.03
	Posterior	2.69 ± 0.11	2.07 ± 0.08	0.66 ± 0.03	0.48 ± 0.02	3.27 ± 0.13	2.67 ± 0.11
	Left	1.87 ± 0.08	1.42 ± 0.06	0.46 ± 0.02	0.33 ± 0.02	1.48 ± 0.06	1.10 ± 0.04
	Right	1.87 ± 0.08	1.50 ± 0.06	0.52 ± 0.02	0.37 ± 0.02	1.78 ± 0.07	1.56 ± 0.06
	Center	2.61 ± 0.11	1.95 ± 0.08	0.72 ± 0.03	0.48 ± 0.02	1.88 ± 0.06	1.52 ± 0.06
Surface	Anterior	2.93 ± 0.12	2.46 ± 0.10	0.72 ± 0.03	0.56 ± 0.02	0.42 ± 0.02	0.22 ± 0.02
	Posterior	2.94 ± 0.12	2.32 ± 0.09	0.71 ± 0.03	0.56 ± 0.02	3.88 ± 0.16	3.21 ± 0.10
	Left	1.68 ± 0.07	1.48 ± 0.09	0.40 ± 0.02	0.39 ± 0.02	1.07 ± 0.04	0.64 ± 0.02
	Right	1.60 ± 0.07	1.51 ± 0.06	0.42 ± 0.02	0.39 ± 0.02	1.79 ± 0.07	1.79 ± 0.07