The coronavirus — Coronaviruses are a family of viruses common both in people and animals. Second, differences in the structure of the parent compound and the radiotracer will alter the fidelity with which the tracer measures utilization of the parent compound, and this relationship between tracer and tracee can vary under different metabolic conditions.18, In addition to categorizing metabolic radiotracers based on their ability to trace metabolic pathways accurately and completely, they can also be grouped according to whether they are single photon–emitting or positron-emitting radiotracers (Table 2-1). Our doctors define difficult medical language in easy-to-understand explanations of over 19,000 medical terms. Evidence of the former existence, influence, or action of an object, phenomenon, or event. Images are visually assessed for defects in tracer uptake representing areas of hypoperfusion. Tracer sind künstliche, mit radioaktiven Stoffen versetzte Substanzen, die aus körpereigenen oder körperfremden Substanzen bestehen. Although there are methods to measure regional CBF in absolute terms with these tracers (i.e., ml per min per gram of tissue), they are infrequently used, typically in research applications. Tracer kinetic methods provide unique and accurate methods for measuring rates of physiologic, biochemical, and pharmacokinetic processes. "what does "uptake" mean on a bone scan as in "mildly increased uptake involving the right c6-c7 facet joint?" In addition, the amount of radioactive material to be added as a marker can be kept extremely small. It has been supplanted by 99mTc-labeled tracers and is no longer commercially available in the US. As noted below, the lack of light absorbance of the biotin tracer in living embryos can be used to advantage in some experiments. That is about all one can say with regard to … But it sounds like it means that there is increased bone metabolism at that location. 99mTc-hexamethylpropylene amine oxime (99mTc-HMPAO) has been widely used. (It is still possible to acquire a DMSA scan 24 hours after tracer injection.) The emissions of radiations by such atoms allow to follow the path or the metabolism of these tracers in the body. Proper usage and audio pronunciation (plus IPA phonetic transcription) of the word tracer. However, the cortical uptake is significantly reduced in comparison to Tc99m-DMSA, with 40% to 65% of the isotope being excreted into the bladder via the urine. [ trās´er] 1. a means or agent by which certain substances or structures can be identified or followed, as a radioactive tracer. In analytical terms, a trace amount is an amount that is detectable but not able to be quantified. Incident reports by nursing staff and nosocomial infections are examples of the functioning of the tracer condition concept. As a result, FDG becomes trapped in the cell. 99mTc is more easily obtained than 123I and has more favorable physical characteristics for imaging. 2-5). Any of several instruments used in making tracings or in imprinting designs by tracing. It is often called the “new” or “novel” coronavirus, because it hasn’t been widespread before in humans. Refers to investment trusts which are populated by corporate bonds. trace - pursue or chase relentlessly; "The hunters traced the deer into the woods"; "the detectives hounded the suspect until they found him" Evidence or an indication of the former presence or existence of something; a vestige: left without a trace of having been there. Source(s): The Web site of the National Cancer Institute (http://www.cancer.gov/) "what does "uptake" mean on a bone scan as in "mildly increased uptake involving the right c6-c7 facet joint?" An extremely small amount or barely discernible indication of something. For example, the anesthetized dog is more sensitive to inotropic stimulation; in contrast, it requires much higher doses of adenosine to elicit the same effect on coronary flow. Top answers from doctors based on your search: Disclaimer. A German–English medical dictionary comes in handy for foreigners seeking German healthcare services. Abscess: A tender, fluid-filled pocket that forms in tissue, usually due to infection. trace, vestige, tincture, shadow (noun) an indication that something has been present. Medical Term Ablation is defined as Ablation Erosive process is performed surgically to eliminate or remove Medical Terminology: Sometimes people may not be familiar with medical terms because they are very specific to one branch of medicine. Trace: Trace means a little bit. 2. trace, hint, suggestion (noun) a just detectable amount "he speaks French with a trace of an accent" trace, vestige, tincture, shadow (noun) A medical tracer must have a short half-life because this will minimize the harm done to the cells of the body. Local tissue radioactivity is normalized, i.e., expressed in relation to the whole brain average or to a brain area assumed not to be involved in the disease process, such as cerebellum. MedTerms online medical dictionary provides quick access to hard-to-spell and often misspelled medical definitions through an extensive alphabetical listing. Ask doctors free. tracer. trace. The term "skip" (as a noun) refers to the person being searched for, and is derived from the idiomatic expression "to skip town", meaning to depart (perhaps in a rush), leaving minimal clues behind to "trace" the "skip" to a new location. Medical terms. First, as demonstrated earlier, these tracers only provide information about a portion of a given metabolic pathway. What does TRACER stand for in Technology? Medical definition, of or relating to the science or practice of medicine: medical history; medical treatment. In broad terms all diagnostic nuclear medicine methods are tracer studies. Lehman Brothers launched a similar product, Targeted Return Index Securities (Trains) in January 2002. Such tracers have to show the same physical and chemical behavior in the system under observation as the material that is actually observed. "there wasn't a trace of evidence for the claim"; "a tincture of condescension". 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