iodine-131

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iodine-131

[′ī·ə‚dīn ¦wən¦thərd·ē′wən]
(nuclear physics)
A radioactive, artificial isotope of iodine, mass number 131; its half-life is 8 days with beta and gamma radiation; used in medical and industrial radioactive tracer work; moderately radiotoxic.
References in periodicals archive ?
Four patients were thyrotoxic and were placed on propylthiouracil (PTU); three patients were already on PTU and did not receive I-131.
In a subset of 39 high-risk patients--defined as having I-131 uptakes in excess of 70%, marked signs and symptoms of hyperthyroidism, and markedly elevated free T4 or free T3 levels--I-131 treatment was well tolerated, and led to "marked clinical improvement.
There was a significant increase in levels of I-131 from about 8 to 80 kBq/L from 10 to 11 May, in parallel with the increase for both radiocaesium isotopes.
The activity concentrations of I-131, Cs-134 and Cs-137 in seawater close to the Fukushima Daiichi plant at the screen of Unit 2 have been measured every day since 2 April.
The concentrations of the relevant radionuclides, estimated from measurements, were 5400 MBq/L of I-131, 1800 MBq/L of Cs-134 and 1800 MBq/L of Cs-137.
Analytical results for 125 of the 129 samples for various vegetables, mushrooms, fruit (strawberry), pork, seafood, fresh milk and raw unprocessed milk indicated that I-131, Cs-134 and Cs-137 were either not detected or were below the regulation values set by the Japanese authorities.
In drinking water, I-131 or Cs-137 is detectable, but at levels below 1 Bq/L and in only a few prefectures.
radiolabeled antibodies) for the BEXXAR therapeutic dose using Iodine I-131 tositumomab.
From 15 to 17 April, I-131 was detected in only one prefecture on 15 April; with a reported value of 4.
For both I-131 and Cs-137, the depositions detected were below 20 Bq/m2 at all stations.
shipments of its recently approved radiotherapeutic product, a kit for the preparation of Sodium Iodide I-131 Capsules and Oral Solution.
In Ibaraki prefecture for samples taken on 11th April, one sample of seafood (sand lance) was above the regulation values set by the Japanese authorities for I-131 and one sample of spinach was above the regulation values set by the Japanese authorities for Cs-134/Cs-137.