Table 1.

Technical specifications of the 3D Accuitomo 170 (J. Morita Mfg. Corp., Kyoto, Japan) cone beam CT

Voltage	60–90 kVp
Tube current	1–8 mA (high-dose mode)
	1–10 mA (low-dose mode)
Exposure time	9.0 s (high-speed mode)
	17.5 s (standard mode)
	31.0 s (high-dose mode)
Exposure type	Continuous
Focal spot	0.5 mm
Filtration	≥3.1 mm Al
Beam angle	5°
Anode material	Tungsten
Half-value layer	60 kVp: 1.9 mmAl
	70 kVp: 2.1 mmAl
	80 kVp: 2.9 mmAl
	90 kVp: 3.2 mmAl
Field of view size	4 × 4, 6 × 6, 8 × 8, 10 × 5, 10 × 10, 14 × 5, 14 × 10, 17 × 5 and 17 × 12 cm
Source-to-isocentre distance	740–840 mm
Detector type	CsI-aSi flat panel detector
Reconstruction algorithm	Feldkamp et al12

Al, aluminium.