| 释义 |
radioactive tracer
radioactive tracer n (Medicine) med See tracer3
radioactive tracer
radioactive tracer[¦rād·ē·ō′ak·tiv ′trā·sər] (nucleonics) A radioactive isotope which, when attached to a chemically similar substance or injected into a biological or physical system, can be traced by radiation detection devices, permitting determination of the distribution or location of the substance to which it is attached. Also known as radiotracer. radioactive tracer
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.ThesaurusSeetracer |