Table 3.

Average DOI difference (standard deviation in mm) of the calibrated depths between different DOI calibration methods for each crystal surface and geometry tested.

	Without energy filter			With energy filter
	Difference between different DOI calibration methods
Crystal type	Collimated–internal	Collimated–flood	Flood–internal	Collimated–internal	Collimated–flood	Flood–internal
1.5 × 20 mm rough cut	0.23	0.56	0.69	0.64	0.25	0.78
1.5 × 20 mm 30 μ finish	0.26	0.51	0.67	0.53	0.33	0.76
1.5 × 20 mm 12 μ finish	0.85	0.38	1.00	0.42	0.39	0.29
1.5 × 20 mm 9 μ finish	0.28	0.50	0.63	0.67	0.36	0.92
1.5 × 20 mm 5 μ finish	0.79	0.87	0.13	0.89	0.51	0.44
1.5 × 20 mm 0.5 μ finish	2.45	2.33	0.16	2.56	1.24	1.42
1.5 × 30 mm rough cut	0.25	0.54	0.72	0.55	0.26	0.70
1.5 × 20 mm 30 μ finish	0.30	0.56	0.78	0.30	0.28	0.48
1.5 × 20 mm 12 μ Finish	0.30	0.51	0.72	0.60	0.44	0.89
1.5 × 20 mm 9 μ finish	0.54	0.28	0.75	0.35	0.49	0.73
1.5 × 20 mm 5 μ finish	1.30	0.19	1.21	0.82	0.73	0.37
1.5 × 20 mm 0.5 μ finish	0.92	0.25	0.74	0.19	1.08	1.01
1.5 × 30 mm rough cut	0.53	0.33	0.75	0.35	0.38	0.62
2 × 30 mm rough cut	0.62	0.28	0.76	0.29	0.42	0.54
2 × 40 mm rough cut	0.74	0.69	0.45	1.09	0.35	1.22