thallium

(redirected from thallium-201)
Also found in: Thesaurus, Medical, Acronyms, Encyclopedia.

thal·li·um

 (thăl′ē-əm)
n. Symbol Tl
A soft, malleable, highly toxic metallic element, used in photocells, infrared detectors, low-melting glass, and formerly in rodent and ant poisons. A radioactive isotope, Tl-201, is used in medical imaging. Atomic number 81; atomic weight 204.38; melting point 304°C; boiling point 1,473°C; specific gravity 11.85 (20°C); valence 1, 3. See Periodic Table.

[thall(o)- (from its green spectral line) + -ium.]

thallium

(ˈθælɪəm)
n
(Elements & Compounds) a soft malleable highly toxic white metallic element used as a rodent and insect poison and in low-melting glass. Its compounds are used as infrared detectors and in photoelectric cells. Symbol: Tl; atomic no: 81; atomic wt: 204.3833; valency: 1 or 3; relative density: 11.85; melting pt: 304°C; boiling pt: 1473±10°C
[C19: from New Latin, from Greek thallos a green shoot; referring to the green line in its spectrum]

thal•li•um

(ˈθæl i əm)

n.
a soft, malleable, rare, bluish white metallic element: used in the manufacture of alloys and, in the form of its salts, in rodenticides. Symbol: Tl; at. wt.: 204.37; at. no.: 81; sp. gr.: 11.85 at 20°C.
[1861; < Greek thall(ós) green stalk + -ium2; after the green line in its spectrum]

thal·li·um

(thăl′ē-əm)
Symbol Tl A soft, easily shaped, very poisonous metallic element that has a low melting temperature. It is used in photography, in making low-melting and highly refractive glass, and in treating skin infections. Atomic number 81. See Periodic Table.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.thallium - a soft grey malleable metallic element that resembles tin but discolors on exposure to airthallium - a soft grey malleable metallic element that resembles tin but discolors on exposure to air; it is highly toxic and is used in rodent and insect poisons; occurs in zinc blende and some iron ores
metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
blende, sphalerite, zinc blende - an ore that is the chief source of zinc; consists largely of zinc sulfide in crystalline form
Translations
таллий
thallium
thallium
talio
tallium
tallium
תליום
talij
tallium
þallín
タリウム
thallium
talis
thallium
tal
taliu
thallium
talij
tallium
talyum
tali

thallium

[ˈθælɪəm] Ntalio m

thallium

n (Chem) → Thallium nt

thallium

n talio
References in periodicals archive ?
Radioguided Surgery in Brain Tumors with Thallium-201.
Magnetic resonance imaging, thallium-201 SPET scanning, and laboratory analyses for discrimination of cerebral lymphoma and toxoplasmosis in AIDS.
MPI SPECT with thallium-201, Tc-99m sestamibi or tetrafosmin and PET imaging with F-18 flourodeoxyglucose (FDG) have an essential role in localising viable myocardium.
Using knowledge already garnered, a test was developed whereby a patient walked on a treadmill or pedaled on an exercise bicycle in an effort to "stress" the heart, after which Thallium-201 (Tl-201) was injected into a vein and circulated throughout the body, including the heart where it could then be seen using a SPECT (single photon emission computed tomography) camera.
Thallium-201 brain SPECT of lymphoma in AIDS patients: Pitfalls and technique optimization.
5 mCi of thallium-201, followed 30 minutes later by a stress test.
All patients underwent thallium-201 myocardial single-photon-emission computerized tomography at rest, using a gamma camera (Starport 400AT; General Electric) interfaced with an ADAC computer (DPS 3300).
Exercise thallium-201 scintigraphy in the diagnosis and prognosis of coronary artery disease.
Comparison of adenosine and exercise thallium-201 SPECT myocardial perfusion imaging.
Radioactive waste can be a common isotope such as technetium-99m or thallium-201.