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thallium
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thallium

Soft, bluish-white, malleable, metallic element, atomic number 81, relative atomic mass 204.38. It is a poor conductor of electricity. Its compounds are poisonous and are used as insecticides and rodent poisons; some are used in the optical-glass and infrared-glass industries and in photocells.

Discovered spectroscopically by its green line, thallium was isolated and named by William Crookes in 1861.



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When technetium--the gold standard for such heart studies--is in critically tight supply, as it now is in Divgi's hospital, physicians have been substituting a much older procedure that uses thallium-201.
Ribose facilitates thallium-201 redistribution in patients with coronary artery disease.
To determine if early (4-h) thallium-201 imaging with ribose infusion would enhance detection of thallium redistribution better than late (24-h) imaging without ribose infusion, 15 patients with coronary artery disease underwent thallium stress tests by both methods within 2 weeks.
 
 
 
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