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Is this statement correct? Tc99m

This is for people who understand isotopes and pharmaceuticals... Please help me ):

" The isotope Technetium-99m is a useful radionuclide as it is a pure gamma emitter with a short half-life. This means that it does not produce more damaging alpha and beta particles and its radioactivity disappears after a few hours. It is the lightest radioactive element known. With technetium-99m, there's a delay between its initial production and emission of gamma radiation further adding to the benefits of its use.

Technetium-99m is produced when molybdenum-99 nucleus decays through beta emission. After a few hours, Technetium-99m emits a gamma ray and becomes Technetium-99. Because Technetium-99m will decay into Technetium-99, regardless of use, it must be constantly replenished by the Nuclear Medicine department. "

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Original post by The Egg Militia
This is for people who understand isotopes and pharmaceuticals... Please help me ):

" The isotope Technetium-99m is a useful radionuclide as it is a pure gamma emitter with a short half-life. This means that it does not produce more damaging alpha and beta particles and its radioactivity disappears after a few hours. It is the lightest radioactive element known. With technetium-99m, there's a delay between its initial production and emission of gamma radiation further adding to the benefits of its use.

Technetium-99m is produced when molybdenum-99 nucleus decays through beta emission. After a few hours, Technetium-99m emits a gamma ray and becomes Technetium-99. Because Technetium-99m will decay into Technetium-99, regardless of use, it must be constantly replenished by the Nuclear Medicine department. "

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imo you could do more to link the half life to the properties which make it a desirable diagnostic tracer as well as causing difficulties - you need to be located near a nuclear medicine lab. possible marks lost for seeming to imply that the radioactivity goes to zero when they're probably looking for you to say it becomes negligible/insignificant in comparison with the background level.

you could do more to link the penetration of tissue by gamma to it's weak ionisation of tissue (i.e. damage) - a high proportion of the gamma produced emerges from the patient to be detected because so little of it ionises atoms on it's journey through the patient.

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