Effects of Exposure Parameters and Voxel Size for Cone-Beam Computed Tomography on the Image Matching Accuracy with an Optical Dental Scan Image: An In Vitro Study

Table 1

Mean and standard deviation of image registration error between the optical scan and 3D-reconstructed radiological images derived from different combinations of tube voltage, tube current, and voxel size of cone-beam computed tomography.

Combination	Tube voltage (kVp)	Tube current (mA)	Voxel size (μm)	(μm)
1	60		100
2		6	200
3			300
4			100
5		8	200
6			300
7	80		100
8		6	200
9			300
10			100
11		8	200
12			300
13	100		100
14		6	200
15			300
16			100
17		8	200
18			300

The field of view (FOV) of  mm with a scanning time of 24 s was used for all cone-beam computed tomography scans.