Kappa coefficients Observer 1 and 2 Observer 1 and 3 Observer 2 and 3 Emboss enhancement            Vixwin 2000 0.69 0.74 0.68 Dimaxis 0.63 0.60 0.69      Dr.Suni plus 0.61 0.60 0.71 Gray-scale reversed enhancement            Vixwin 2000 0.90 0.69 0.70 Dimaxis 0.84 0.86 0.82 Dr.Suni plus 0.87 0.76 0.77 Contrast-brightness enhancement          Vixwin 2000 0.79 0.66 0.66      Dimaxis 0.72 0.75 0.71      Dr.Suni plus 0.66 0.65 0.61

Table 2: Interobserver kappa coefficients by enhanced digital radiograph of the 3 digital radiographic systems.