BioMed Research International / 2017 / Article / Tab 3

Research Article

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

Table 3

Low contrast value for each detector.

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

Standard11.75 (0.91)8.23 (0.94)7.22 (0.10)7.29 (0.19)16.50 (0.15)9.86 (0.19)
Half8.31 (0.63)6.62 (0.74)6.05 (0.22)5.95 (0.15)16.50 (0.07)10.20 (0.16)
One-tenth4.76 (0.66)5.08 (0.67)5.48 (0.18)5.36 (0.27)5.30 (0.23)4.47 (0.09)

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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