Diagnostic Imaging

Abstract

Since W. C. Roentgen discovered X-rays in 1895, screen-film systems have been used in diagnostic imaging for a long period. Appearance of digital systems has led to major changes in the diagnostics area. In this paper, I describe the following things such as analog and digital images, the purpose of the image evaluation, relationship between sensitivity and image quality of medical imaging, evaluation using the concept of signal-to-noise ratio (SNR), and computer aided diagnosis (CAD).