Category: R

Inflammation of the nerve roots, meninges, and spinal cord.  

Inflammation of the posterior spinal roots and their ganglia.  

A device for radiating heat or light.  

The administration of high-energy x-ray photons, electrons, or nuclear emissions for the cure of cancer or palliation of symptoms.  

Illness due to overexposure to harmful electromagnetic waves, usually x-rays or gamma rays. Mild acute illness is manifested by anorexia, headache, nausea, vomiting, and diarrhea. Delayed effects resulting from repeated or prolonged exposure may result in skin ulcers, alopecia, proctitis, enteritis, amenorrhea, sterility, disturbances in blood cell formation, cataract formation, premature aging, and cancer.  …

An international symbol used to indicate radioactive sources, containers for radioactive materials, and areas where radioactive materials are stored and used. The presence of this symbol (a magenta or black propeller on a yellow background) on a sign denotes the need for caution to avoid contamination with or undue exposure to atomic radiation. The wording…

Prophylaxis against injury from ionizing radiation. The only effective preventive measures are shielding the source and the operator, handlers, and patients; maintaining appropriate distance from the source; and limiting the time and amount of exposure. In general, the use of drugs to protect against radiation is not practical because of their toxicity. An exception is…

Ionizing radiation that passes through the part being examined to make the radiographical image.  

A unit of angular measurement equivalent to 57.295 degrees. It is subtended at the center of a circle by an arc the length of the radius of the circle.  

The capability of being penetrated readily by ionizing radiation,