How is technetium 99m detected?

Technetium-99m can be readily detected in the body by medical equipment because it emits 140.5 keV gamma rays (these are about the same wavelength as emitted by conventional X-ray diagnostic equipment), and its half-life for gamma emission is six hours (meaning 94\% of it decays to 99Tc in 24 hours).

What is the difference between TC-99 and Tc-99m?

Technetium-99 is produced during nuclear reactor operation, and is a byproduct of nuclear weapons explosions. 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 are the properties of technetium 99m?

The favorable physical characteristics (Fig. 1) of technetium 99m consist of a short, but not too short, physical half-life of six hours, the emission of a clean 140 kev gamma ray, and the absence of primary particle radiation. The energy deposition in tissue is thus extremely small.

Is Tc-99m safe?

Technetium-99m has a photopeak of gamma-ray emission of 140.5 keV, making it a very minimal risk of toxicity. [3] The short six-hour half-life and rapid excretion from the body limit toxic effects and give enough time to perform its diagnostic imaging, all while limiting radiation exposure to the patient.

How is technetium 99m administered?

When administered by intravenous injection, Technetium Tc 99m Sulfur Colloid is taken up by the reticuloendothelial system (RES), allowing RES rich structures to be imaged.

What is U 233 used for?

Uranium-233 (233U) is a fissile isotope of uranium that is bred from thorium-232 as part of the thorium fuel cycle. Uranium-233 was investigated for use in nuclear weapons and as a reactor fuel. It has been used successfully in experimental nuclear reactors and has been proposed for much wider use as a nuclear fuel.

How is technetium 99m made?

Technetium -99m is produced by bombarding molybdenum 98Mo with neutrons. The resultant 99Mo decays with a half-life of 66 hours to the metastable state of Tc . This process permits the production of 99mTc for medical purposes.

What is the color of technetium?

Silvery grey metallic
Basic Information

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