| radiodermatitis | A cutaneous inflammatory reaction occurring as a result of exposure to ionizing radiation. (12 Dec 1998) |
|---|---|
| radiodiagnosis | Diagnosis using X-rays; or, more broadly, diagnostic imaging, including radiology, ultrasound, and magnetic resonance. (05 Mar 2000) |
| radiodigital | Relating to the fingers on the radial or lateral side of the hand. (05 Mar 2000) |
| radioelectrophysiologram | The record obtained by means of the radioelectrophysiolograph. (05 Mar 2000) |
| radioelectrophysiolograph | Formerly, an apparatus carried by a mobile individual by means of which changes in electrical potential from the brain or heart can be picked up and radio-transmitted to an electroencephalograph or an electrocardiograph. See: telemeter. (05 Mar 2000) |
| radioelectrophysiolography | Formerly, recording the changes in the electrical potential of the brain or heart by means of the radioelectrophysiolograph. See: telemetry. (05 Mar 2000) |
| radioelement | Any element possessing radioactivity. (05 Mar 2000) |
| radioepidermitis | A cutaneous inflammatory reaction occurring as a result of exposure to ionizing radiation. (12 Dec 1998) |
| radioepithelitis | Destructive changes in epithelium produced by ionizing radiation. (05 Mar 2000) |
| radiofrequency | 1. Radiant energy of a certain frequency range; e.g., radio and television employ radiant energy having a frequency between 105-1011 Hz, while diagnostic X-rays have a frequency in the range of 3 × 1018 Hz. 2. In magnetic resonance imaging, the energy applied to switch or create a gradient in the magnetic field. (05 Mar 2000) |
| radiofrequency plugging | <radiobiology> Use of axial ponderomotive force to plug an open-ended device. First demonstrated on RFC-XX, Institute of Plasma Physics, Nagoya University, Nagoya, Japan, and later demonstrated in the Phaedrus device at the University of Wisconsin. (09 Oct 1997) |
| radiofrequency pulse | In nuclear magnetic resonance, a short electromagnetic signal used to change the direction of the magnetic field. See: sequence pulse. (05 Mar 2000) |
| radiofrequency trapping | <radiobiology> Use of RF waves to pitch angle scatter particles flowing axially into a magnetic mirror cell. The particles are scattered out of the loss cone and are trapped. (See entries for pitch angle scattering, magnetic mirror, loss cone.) (09 Oct 1997) |
| radiogallium | Gallium that is radioactive. See: gallium-67, gallium-68. (05 Mar 2000) |
| radiogenesis | The formation or production of radioactivity resulting from radioactive transformation or disintegration of radioactive substances. Origin: radio-+ G. Genesis, production (05 Mar 2000) |