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McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a branch of radiotherapy that is concerned with the theory and practice of therapeutically using X rays generated on an X-ray tube at a voltage of 20–60 kilo-volts (kV) and a skin-focal distance of 3–7 cm (short-range roentgenotherapy) or at a voltage of 180–400 kV and a skin-focal distance of 30–150 cm (long-range roentgenotherapy). Roentgenotherapy is used primarily in the treatment of superficial tumors and some other diseases.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.