Kappa coefficients Observer 1 Observer 2 Observer 3 Emboss enhancement       Vixwin 2000 0.86 0.86 0.91      Dimaxis 0.81 0.81 0.67      Dr.Suni plus 0.70 0.70 0.89 Gray-scale reversed enhancement       Vixwin 2000 1.00 0.81 0.87      Dimaxis 0.96 0.86 0.75      Dr.Suni plus 0.99 0.69 0.95 Contrast-brightness enhancement          Vixwin 2000 0.96 0.85 0.89      Dimaxis 0.96 0.82 0.81      Dr.Suni plus 0.97 0.75 0.79

Table 1: Intraobserver kappa coefficients by enhanced digital radiograph of the 3 digital radiographic systems.