What is the half-life of TC 99?

6 hours
Technetium-99m is a short-lived form of Tc-99 that is used as a medical diagnostic tool. It has a short half-life (6 hours) and does not remain in the body or the environment for long.

What is Sulphur colloid scan?

Sulfer colloid is taken up by special cells in lymph tissue, and in the liver, spleen, and bone marrow after it is injected. A machine or probe that detects radioactivity is used to find where the technetium Tc 99m-sulfur colloid is in the body. Also called Tc 99m sulfur colloid and Tc-99m SC.

What is the location of Tc 99m sulfur colloid concentration when injected subcutaneously?

Following oral ingestion, Technetium Tc 99m Sulfur Colloid is distributed primarily through the gastrointestinal tract. In the average patient 80 to 90% of the injected collodial particles are phagocytized by the Kupffer cells of the liver, 5 to 10% by the spleen and the balance by the bone marrow.

What is sulfur colloid used for?

CIS-Sulfur Colloid Kit for Preparation of Technetium Tc99m Sulfur Colloid Injection is a diagnostic aid used for imaging areas of functioning reticuloendothelial cells in the liver, spleen and bone marrow; for esophageal transit studies, gastroesophageal reflux scintigraphy, and for the detection of pulmonary …

Is technetium-99m injected?

Technetium Tc 99m oxidronate injection is used to help your doctor see an image of your bones to help diagnose bone problems. This medicine is to be given only by or under the direct supervision of a doctor with specialized training in nuclear medicine.

Is technetium 99m injected?

Is there any risk using technetium 99m?

Technetium and Health. Technetium-99 can pose a health risk when it enters the body. Once in the human body, Tc-99 concentrates in the thyroid gland and the gastrointestinal tract. However, the body constantly gets rid of Tc-99 in feces.

What is the half-life of technetium 99?

Molybdenum-99, with a half-life of 65.94 hours, decays into technetium-99 through beta decay. While technetium has never been found to occur naturally on earth, its spectral lines have been observed in S-, M- and N-type stars. Technetium’s most stable isotope, technetium-98, has a half-life of about 4,200,000 years.

What is the formula for half life problems?

The formula for calculation of half-life (T1/2) requires the knowledge of the initial concentration (C1), and the subsequent concentration (C2) obtained an amount of time later (t). The formula is: T1/2 = t / [log2(C1/C2)] Today, there are computer programs that will allow the numbers to be plugged in and the half-life result returned.

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