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branch of medicine specializing in the use of X rays, gamma rays, radioactive isotopes, and other forms of radiation in the diagnosis and treatment of disease. X ray machines and fluoroscopes are essential in diagnosing bone fractures, tumors, and other abnormalities of the internal organs. The computerized axial tomography (CAT) scan uses computer technology to focus X rays on precise sections of the body. Magnetic resonance imaging (MRI) utilizes supercooled magnets to concentrate and focus radiation in very small areas of the body, rendering sharp detail. Radioactive isotopes are also employed in diagnosis, e.g. iodine–131 is used to confirm cases of suspected thyroid disorder. In radiotherapy, X rays, gamma rays, and other radiation sources are used in the treatment of cancercancer,
in medicine, common term for neoplasms, or tumors, that are malignant. Like benign tumors, malignant tumors do not respond to body mechanisms that limit cell growth.
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 and related diseases.



the medical science that studies the theory and practical use of ionizing radiation in the diagnosis and treatment of disease; it also studies the biological effects of ionizing radiation.

Radiology developed at the turn of the 20th century as a result of the discovery of X rays in 1895 and natural radioactivity in 1896. Its development as an independent discipline was related to advances in physics, chemistry, technology, and biology. In its initial stage, when X rays of low intensity and natural radioactive isotopes were used, the principles and methods common to both radiology and radiobiology were formulated; these sciences were later to become differentiated. The foundations for radiodiagnostics and radiotherapy, in the form of roentgenotherapy and curietherapy, were also established at this time.

The discovery of artificial radioactivity in 1934 and the development of atomic energy led to the creation of new scientific areas of study and branches of radiology including the following: the clinical aspects and therapy of radiation injuries; radiation hygiene, which studies the effect of ionizing radiation on human health; various methods of protecting the environment against contamination by radioactive substances and ensuring the safety of the population against radiation; and radioisotope diagnosis, which utilizes artificial radioisotopes and their compounds to study complex biochemical, physiological, and pathophysiologic processes in the body. Teletherapy was developed, which uses powerful gamma-ray sources with linear accelerators, betatrons, and such isotopes as 60Co and 137Cs. Medicinal preparations in the form of solutions, needles, beads, and applicators containing 198Au, 60Co, and 99Y were also developed, as were methods of proton, neutron, and meson therapy.

Usage of a particular treatment is based on differences in the distribution of a radiation dose in irradiated tissue and the relative biological effectiveness of the treatment in that area. The large number of differing sources of ionizing radiation used in therapy has been responsible for the improvement of clinical dosimetry. Dosimetry is aimed at substantiating the physical parameters of radiotherapy, which take into account the nature of the reaction of living tissue to irradiation. The theories and methods of radiology are used in different branches of medicine and often influence diagnosis and therapy.

In the USSR and some other countries, radiology and roentgenology are viewed as independent disciplines; and separate institutes, university subdepartments, societies, and journals are devoted to each discipline. In many countries, radiology includes roentgenology. Radiation therapy is often referred to as radiotherapy, and radioisotope diagnosis, as nuclear medicine.

The leading radiology research centers include the Institute of Medical Radiology of the Academy of Medical Sciences of the USSR, the Central Scientific Research Institute of Roentgenology and Radiology of the Ministry of Public Health of the USSR, and the Moscow Scientific Research Institute of Roentgenology and Radiology of the Ministry of Public Health of the RSFSR. Radiology research centers outside the USSR include the Gustave Roussy Institute and the Radium Institute (France) and Anderson Hospital and the Cancer Institute (USA). In the USSR, medical radiology is taught in the roentgenology and radiology subdepartments of medical institutes. Journals on radiology include Meditsinskaia radiologiia (Medical Radiology; founded 1956) and Vestnik rentgenologii i radiologii (Journal of Roentgenology and Radiology; founded 1920).


Kozlova, A. V. Luchevaia terapiia zlokacheslvennykh opukholei. Moscow, 1971.
Pereslegin, I. A., and Iu. Kh. Sarkisian. Klinicheskaia radiologiia. Moscow, 1973.
Bases physiques de la radiothérapie et de la radiobiologie. Paris, 1963.
Radiation Dosimetry. Edited by G. I. Hine and G. L. Brownell. New York, 1956.
Glocker, R., and E. Macheranuch. Röntgen- und Kernphysik für Mediziner und Biophysiker, 2nd. ed. Stuttgart, 1965.



The medical science concerned with radioactive substances, x-rays, and other ionizing radiations, and the application of the principles of this science to diagnosis and treatment of disease.


the use of X-rays and radioactive substances in the diagnosis and treatment of disease
References in periodicals archive ?
com/research/94eff1/european_markets_f) has announced the addition of Frost & Sullivan's new report "European Markets for Interventional Radiology and Cardiology" to their offering.
and completed his Vascular and Interventional Radiology fellowship training at the Johns Hopkins Medical Institutions.
Christine Rullo, Publishing Director at Elsevier, states, "Elsevier is delighted to be working with the Society of Interventional Radiology to help extend the dissemination of information published in the Journal of Vascular and Interventional Radiology both domestically and internationally.
Total quantity or scope: Sterile Medicinal technical measures 116 packages for Invasive Diagnostics Laboratory of Cardiovascular and Interventional Radiology Laboratory of Regional Hospital in Elblag.
About the Society of Interventional Radiology Interventional radiologists are physicians who specialize in minimally invasive, targeted treatments.
We are excited to collaborate with them on new quality publications that show how interventional radiology harnesses image-guided therapies to develop breakthrough treatments, change medical practice, and improve the standard of patient care.
28-March 5 in Atlanta, GA, will mark nearly 50 years of interventional radiology education.
We are very interested in pioneering the evaluation of Optical Biopsy in Interventional Radiology procedures as the HEGP is a center of excellence in Interventional Oncology and has always been at the forefront of innovation," added Prof.
JVIR's Web site has been redesigned and includes many new features, such as improved navigation; access to current articles, features and issues; and the most up-to-date information on research and other interventional radiology news.
The new Interventional Radiology Suite, made possible by OFID grant, will replace the old machine currently at use at the Center and will provide faster processing time, dual x-rays, and high-resolution imaging capabilities.
As a company, Cook remains committed to innovating devices that streamline procedures for interventional radiologists," said Dan Sirota, vice president and global leader of Cook Medical's Interventional Radiology and Critical Care divisions.
Researchers will have the opportunity to advance the field of image-guided interventions by sharing their basic science results, device and procedure innovations and clinical outcomes research at SIR 2016-the world's most comprehensive interventional radiology meeting, which attracts more than 5,000 attendees from around the globe.

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