radioactive tracer

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tracer

 [trās´er]
1. a means or agent by which certain substances or structures can be identified or followed, as a radioactive tracer.
2. a mechanical device by which the outline of an object or the direction and extent of movement of a part may be graphically recorded; see also tracing.
3. a dissecting instrument for isolating vessels and nerves.
radioactive tracer a radioactive isotope replacing a stable chemical element in a compound (said to be radiolabeled) and so able to be followed or tracked through one or more reactions or systems by means of a radiation detector; used especially for such a compound that is introduced into the body for study of the compound's metabolism, distribution, and passage through the body.

radioactive tracer

a molecule containing a radioactive atom, which can be followed through a physiological system with radiation detectors.

radioactive tracer,

n a molecule to which a radioactive atom has been attached so that it can be followed through a physiologic system with radiation detectors.

radioactive

characterized by radioactivity.

radioactive decay
spontaneous decomposition of the nuclei of the atoms of radioactive substances. Measured as the proportion of the atoms in a radionuclide that decompose per unit of time, usually stated as the half-life of that particular isotope.
radioactive fallout
dissemination of radioactive substances through the atmosphere and deposition on the environment generally; causes radiation injury.
radioactive isotope
radionuclide. A radioactive nuclide, e.g. radioactive iodine or strontium.
radioactive tracer
see radioactive tracer.

tracer

a means by which something may be followed, as (1) a mechanical device by which the outline or movements of an object can be graphically recorded, or (2) a material by which the progress of a compound through the body may be observed.

radioactive tracer
a radioactive isotope replacing a stable chemical element in a compound introduced into the body, enabling its metabolism, distribution and elimination to be followed in the living animal.
References in periodicals archive ?
Intraoperative radioactive tracing and blue-dye injections are complementary, he noted.
Her study of 70 patients included 41 women who had SLN mapping with intracervical blue dye injection alone and another 29 patients who had both blue dye injection and radioactive tracing with lymphoscintigraphy.
Lymphoseek is a proprietary radioactive tracing agent being developed for use in connection with gamma detection devices in pre-operative lymphoscintigraphy imaging and in a surgical procedure known as Intraoperative Lymphatic Mapping.
Lymphoseek is a proprietary radioactive tracing agent being developed for use with gamma detection devices in a surgical procedure known as Intraoperative Lymphatic Mapping (ILM).
The system utilizes a radioactive tracing agent, which is injected directly into the tumor site.
SLNB begins when a patient is injected at the site of the main tumor with a commercially available radioactive tracing agent.

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