Fluoroscopy is an imaging modality that uses X-rays to obtain real-time visualization or live image of structures and functions of internal organs. All contrast procedures are carried out in the fluoroscopic room. It is also called the special procedures room. In this room, the fluoroscopic machine is there which is used to see inside the body. The X-rays passes through the body and image is then produced on the film or monitor. Fluoroscopy is a special imaging device which was invented by Thomas Edison in 1896. Fluoroscopy is similar to radiography. The differences is that the radiography gives still images on X-ray film whereas fluoroscopy provides live moving pictures on fluoroscopic monitor. The principal advantage of image-intensified fluoroscopy over earlier types of fluoroscopy is increased image brightness. Just as it is much more difficult to read a book in dim illumination than in bright illumination, it is much harder to interpret a dim fluoroscopic image than a bright one. During fluoroscopy, maximum image detail is desired; this requires high levels of image brightness. The image intensifier was developed mainly to replace the conventional fluorescent screen, which had to be viewed in a darkened room and then only after 15 minutes of dark adaptation the image intensifier raises illumination into the cone vision region, where visual acuity is greatest. During fluoroscopy, the cassette is placed in a lead-lined shroud so it is not unintentionally exposed and spot film is taken when desired. Fluoroscopy plays an important role in radiology to perform contrast studies.