Diagnostic RadiologyRadiology is the branch of medical science dealing with medical imaging. It may use x-ray machines or other such radiation devices. It also uses techniques that do not involve radiation, such as MRI and ultrasound.
As a medical specialty, radiology can refer to two sub-fields, diagnostic radiology and therapeutic radiology.
Diagnostic radiology -is concerned with the use of various imaging modalities to aid in the diagnosis of disease. Diagnostic radiology can be further divided into multiple sub-specialty areas. Interventional radiology, one of these sub-specialty areas, uses the imaging modalities of diagnostic radiology to guide minimally invasive surgical procedures.
Therapeutic radiology—or, as it is now called, radiation oncology uses radiation to treat diseases such as cancer using a form of treatment called radiation therapy.
Radiographs are image created with X-rays, and used for the evaluation of many bony and soft tissue structures. Fluoroscopy and angiography are special applications of X-ray imaging. Fluoroscopy is a technique where a fluorescent screen or image intensifying tube is connected to a closed-circuit television system to image internal structures of the body. Angiography uses methods to demonstrate the internal structure of blood vessels, highlighting the presence and extent of obstruction to the vessel, if any. In medical imaging, contrast media are substances that are administered into the body, usually injected or swallowed, to help delineate the anatomy of blood vessels, the genitourinary tract, the gastrointestinal tract, etc. Contrast media, which strongly absorb X-ray radiation, in conjunction with the real-time imaging ability of fluoroscopy and angiography help to demonstrate dynamic processes, such as the peristalsis of the digestive tract or blood flow.
The Radiology report is the most critical component of the service provided by a radiologist. It constitutes the formal documentation and communication of the results of a radiologic study or procedure. The reports are usually dictated by a trained radiologist, but reports may vary greatly in style, format, and effectiveness.