Table 1:

Acquisition and reconstruction protocols and effective radiation dose for cochlear implant imaging on 64-section scanners

Variable	Aquilion 64	Brilliance 64	LightSpeed 64	Sensation 64
Acquisition protocol
Tube voltage, kV	120	140	140	120
Tube current, mA	200	200	335	135
Beam collimation, mm	4 × 0.5	2 × 0.55	32 × 0.625	12 × 0.6
Pitch	0.75	0.5	0.531	0.45
Rotation time, s	0.5	0.5	0.6	1.0
Scan FOV	240	500	320	500
Dose of acquisition protocol
Effective dose, mSv	1.4	2.0	1.8	1.3
Reconstruction protocol
Section thickness, mm	0.5	0.55	0.6	0.6
Section interval, mm	0.3	0.3	0.3	0.3
Kernel	FC84	Filter D	BonePlus	U90u
Reconstruction matrix	512²	768²	512²	512²
Recon FOV PMMA phantom, mm	100
Recon FOV PSF phantom, mm	50
Recon FOV cadaver head, mm	80

Note:—FOV indicates field of view; PMMA, polymethylmethacrylate; PSF, point spread function.