In Vitro Quantitative Evaluation of Postprocessing Filter for Metal Artifact Reduction in Cone Beam Computed Tomography Images of Titanium and Zirconium Dioxide Implants

Table 1

Quantification mean (standard deviation) values of the artifact with titanium and zirconium dioxide implants.

Titanium implant			Zirconium dioxide
Filter	Mean	SD	Filter	Mean	SD
43			43
Filter 1x	6.4	0.3	Filter 1x	9.2	0.0
Filter 2x	6.3	0.2	Filter 2x	9.1	0.1
Filter BAR	5.7	0.0	Filter BAR	7.4	0.1
Multi-CDT NR	6.0	0.0	Multi-CDT NR	8.4	0.1
Nonfiltered	6.7	0.0	Nonfiltered	9.5	0.0
41			41
Filter 1x	6.6	0.1	Filter 1x	9.3	0.2
Filter 2x	6.5	0.2	Filter 2x	9.2	0.0
Filter BAR	5.7	0.1	Filter BAR	6.7	0.3
Multi-CDT NR	6.3	0.1	Multi-CDT NR	7.6	0.0
Nonfiltered	6.9	0.2	Nonfiltered	9.8	0.1
44			44
Filter 1x	6.6	0.2	Filter 1x	9.2	0.2
Filter 2x	6.5	0.2	Filter 2x	8.9	0.2
Filter BAR	5.1	0.0	Filter BAR	7.2	0.1
Multi-CDT NR	5.4	0.1	Multi-CDT NR	8.4	0.2
Nonfiltered	6.5	0.1	Nonfiltered	9.1	0.0
46			46
Filter 1x	6.4	0.3	Filter 1x	8.9	0.0
Filter 2x	6.0	0.2	Filter 2x	8.8	0.0
Filter BAR	5.1	0.1	Filter BAR	6.6	0.2
Multi-CDT NR	5.9	0.2	Multi-CDT NR	7.2	0.1
Nonfiltered	6.2	0.2	Nonfiltered	9.1	0.2

: number of scans; SD: standard deviation.