LCD 4.0 is the first commercially available dental application program to take advantage of DICOM to allow the dentist to perform analyses and diagnoses on images from widely different sensors (CCD, CMOS and PSP technologies). LCD 4.0 interoperability with DICOM images from 11 different dental vendors involved in manufacture or display of digital grayscale images has been demonstrated. LCD interoperability with DICOM images sent over the Internet has also been demonstrated with private practice dentists.