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radiolucent

(rā″dē-ō-lū′sĕnt) [″ + lucere, to shine] Penetrable by x-rays.

radiolus

(rā-dē′ō-lŭs) [L., a little ray] A sound or probe.

radiometer

(rā-dē-ŏm′ĕ-tĕr) [″ + Gr. metron, measure] An instrument for measuring the intensity of radiation.

radiomicrometer

(rā″dē-ō-mī-krŏm′ĕ-tĕr) [″ + Gr. mikros, + small, metron, measure] An instrument for measuring small changes in radiation.

radiomimetic

(rā″dē-ō-mĭm-ĕt′ĭk) [″ + Gr. mimetikos, imitation] Imitating the biological effects of radiation. Alkylating agents are examples of substances with this property. SEE: alkylating agent.

radiomuscular

(rā″dē-ō-mŭs′kū-lăr) Pert. to the radius or radial artery and the muscles of the arm.

radiomutation

(rā″dē-ō-mū-tā′shŭn) The permanent alteration of the genetic material of a cell caused by the effects of ionizing radiation.

radionecrosis

(rā″dē-ō-nĕ-krō′sĭs) [″ + Gr. nekrosis, state of death] The disintegration of tissue resulting from exposure to ionizing radiation.

radioneuritis

(rā″dē-ō-nū-rī′tĭs) [″ + Gr. neuron, sinew, + itis, inflammation] Inflammation of a nerve caused by exposure to radioactivity.

radionuclide

(rā″dē-ō-nū′klīd) An atom that disintegrates by emitting electromagnetic rays, known as gamma rays.

radiopacity

(rā″dē-ō-păs′ĭ-tē) Radiodensity.

radiopaque

(rād″-ē-ō-pāk′) Impenetrable to x-rays or other forms of radiation. SYN: radiodense.

radiopathology

(rā″dē-ō-pă-thŏl′ō-jē) [″ + Gr. pathos, disease, suffering, + logos, word, reason] The study of radiation injuries.

radiopelvimetry

(rā″dē-ō-pĕl-vĭm′ĕt-rē) [″ + pelvis, basin, + Gr. metron, measure] Measurement of the pelvis by use of x-rays.

radiopharmaceutical

(rād″ē-ō-far″mă-soot′ĭ-kăl) A radioactive chemical or drug (such as an isotope of technetium or iodine) that has a specific affinity for a particular body tissue or organ. It can be used in nuclear medicine to obtain images of structures, or to treat radiation-sensitive diseases.

Image not available. Radiopharmaceuticals must be handled in accordance with prescribed methods to prevent the patient or those treating the patient from being exposed to unnecessary ionizing radiation.

SYN: radiotracer.

radiophosphorus

(rā″dē-ō-fŏs′fō-rŭs) A radioactive isotope of phosphorus. 32P is used in medical studies.

radiopotassium

(rā″dē-ō-pō-tăs′ē-ŭm) A radioactive isotope of potassium. 42K is used in medical studies.

radiopotentiation

(rā″dē-ō-pō-tĕn″shē-ā′shŭn) [″ + potentia, power] The augmentation of the effect of radiation. This may be produced by certain drugs and by oxygen.

radioreaction

(rā″dē-ō-rē-ăk′shŭn) The reaction of the body to radiation.

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