BioMed Research International / 2017 / Article / Tab 2

Research Article

Numerical Evaluation of Image Contrast for Thicker and Thinner Objects among Current Intraoral Digital Imaging Systems

Table 2

Contrast-to-noise ratio for each detector.

DoseDigoraVistaScanMegadixel
Pb (−)Pb (+)Pb (−)Pb (+)Pb (−)Pb (+)
mean (SD)mean (SD)mean (SD)mean (SD)mean (SD)mean (SD)

Standard0.31 (0.48)2.63 (1.07)5.46 (0.60)5.63 (1.42)10.70 (0.06)10.28 (0.09)
Half0.64 (0.47)2.23 (1.27)4.26 (0.26)4.48 (0.98)7.51 (0.10)7.48 (0.19)
One-tenth0.27 (0.29)1.20 (0.52)2.16 (0.17)1.94 (0.07)4.79 (0.20)6.11 (0.33)

Each dose for CCD (Megadixel) is half of that for PSP (Digora and VistaScan).
Pb shows the existence of lead during exposure. (−) and (+) mean without and with lead.

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