Since its inception in 1895 by Roentgen, the field of diagnostic sciences has undergone constant development. In 1984 Dr. Frances Mouyens introduced digital radiography in dentistry. 10-20 % dental practitioners in North America use digital radiography and the numbers are on an increase. Digital radiography uses intraoral sensor replacing silver halide film. X-rays fall on the sensor and an image is formed on a computer screen instantaneously, avoiding time-consuming chemical processing of conventional radiography. Moreover, there is a 90% reduction in radiation dosage. A digital image can be manipulated in various ways. This article reviews the basic concept of digital radiography.