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.

ra·di·o·tra·cer

(rā'dē-ō-trā'sĕr),

A radionuclide or radiolabeled chemical; a radioactive tracer.

Farlex Partner Medical Dictionary © Farlex 2012

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References in periodicals archive

After that, complete radiotracer is prepared for intravenous injection.

Normal Uptake of [sup. 11]C-Acetate in Pancreas, Liver, Spleen, and Suprarenal Gland in PET

Caption: Figure 2: Anterior planar nuclear images of the thorax (upper images) and abdomen (lower images) obtained after radiotracer administration with [sup.99m]Technetium-labeled albumin into the peritoneal cavity.

Nuclear Imaging to Detect Diaphragmatic Perforation as a Rare Complication of Microwave Ablation

(d) Anterior and posterior planar views from a postablation I-131 WBS show expected radiotracer uptake in the neck as well as an incidental focus of intense activity in the left lower thorax (arrow).

False Positive Findings on I-131 WBS and SPECT/CT in Patients with History of Thyroid Cancer: Case Series

Linear uptake in the posteromedial distal tibial aspects indicated medial tibial stress syndrome or shin splints and radiotracer accumulation at the insertion sites of major lower limb muscles was labeled as activity induced enthesopathy.

PATTERNS OF STRESS RELATED INJURIES OF LOWER LIMBS IN MILITARY SETUP ON SKELETAL SCINTIGRAPHY

The IMAkinib project includes several programs, the most advanced being the development of an EGFR kinase-targeting radiotracer. Mutations activating this kinase are responsible for non-small-cell lung adenocarcinoma, which accounts for 15% of lung cancers and affects almost 6,000 patients2 each year in France.

RADIOTRACER RECEIVES PRECLINICAL VALIDATION

Results showed that after follow-up, patients' SPECT scans revealed substantial decreases in radiotracer binding to the dopamine transport system in the nigrostriatal regions of the brain.

REM sleep disorder a sign of impending neurodegenerative disease

99mTc-DMSA scan revealed an inhomogeneous distribution of radiotracer in renal parenchyma, which was lower in the upper-medial part of the right kidney.

Dent's disease type 1 in a boy with severe hyperopia and mental dysfunction: a case report

A 123-I Meta-Iodobenzylguanidine (MIBG) scan was arranged demonstrating avid uptake of radiotracer to the right retroperitoneal mass only (Fig.

Largest pheochromocytoma reported in Canada: A case study and literature review