What is Radiology?
Radiology is the study of image of the human body. A Radiologist is a physcian who has become a specialist in Radiology - a medical doctor who has taken additional training in the interpretation of medical images.
This training usually takes 5 - 6 additional years after completing Medical School.
Although Radiology began with the use of X-Rays and large flat sheets of photographic films, the modern Radiologist now has a variety of tools for "taking pictures" of living patients. Many of these newer tools create an image with a computer (CT - computed tomography) and some do not use any X-Rays, nor radiation of any kind - such as MR and Ultrasound.