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 ?
But, the new method is non-invasive, relatively inexpensive, and does not use radioactive tracers.
Contract award: Short lived positron emitting radioactive tracer 18F-Fluorodeoxyglucose (FDG) to GMP std.
But when Perlstein and his team gave the cells a low dose of sertraline labeled with a radioactive tracer, the drug accumulated inside membranes that surround the yeast cells and their organelles.
PET (positron emission tomography) scans use a radioactive tracer to produce images based on bodily functions such as blood flow, oxygen use and glucose uptake.
Lymphatic mapping involves injecting a breast tumor with blue dye and/or a radioactive tracer.
A special technique was used in the last stage of the gas injection pilot, whereby an environment- friendly radioactive tracer material, known as tritiated methane, was injected with the gas at the start-up.
Unlike mammography, the SonoCine AWBU procedure requires no breast compression or x-ray radiation, and unlike MRI and MBI/BSGI, it requires neither a contrast agent, nor a radioactive tracer.
The CMA has cleared Alliance s acquisition of the assets of the IBA business used to produce a radioactive tracer for cancer diagnosis.
In experiments in the lab, Pierce used a radioactive tracer to show that the slugs were making the pigment, called chlorophyll a, themselves and not simply relying on chlorophyll reserves stolen from the algae.
The CMA has provisionally cleared the completed acquisition by Alliance of assets of the IBA business used to produce a radioactive tracer for cancer diagnosis.

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