X-rays define Radiology as the medical specialty dealing with imaging. It is a branch of medicine concerned with X-rays, ultrasounds and other imaging techniques. Radiology is the study of images of the human body. Radiology is both a diagnostic and therapeutic tool. Radiology includes a number of different modalities, such as plain radiography, CT Scanning, magnetic resonance imaging, ultrasound, and nuclear medicine, to identify disease and other conditions within the Human body. 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 patients. Radiology interpretation is dependent on the ability to make observations and interpret them within a framework of knowledge. Radiographs are two-dimensional, images generated by the interaction of X-rays and the tissues, which depict variation in the types and nature of structure (influenced by atomic number, density and thickness), permanently recorded in the emulsion that is been supported by a plastic base. The first part of this statement is fact: as a complete statement, its truth is dependent on as series of procedure carried out correctly.