what are the properties of radionuclides used for imaging purposes?

Answer 1

The complete answer to this question is indeed complicated but the basics are as follows.

A radioactive material used for nuclear medicine imaging should:
• emit a radiation that can be detected outside the body (usually x-rays or gamma rays)
• be relatively affordable
• be able to be put into the body easily (injection, inhalation, ingestion)
• mimic behavior of a biological material or be able to be ‘stuck to’ a biological material for a specific test (labeling)
• be nontoxic and nonallergenic or as low a toxicity as possible
• deliver the smallest possible dose to the body or target organ while delivering useful information (see next few items for dose minimization)
• be eliminated from the body as rapidly as possible (short biological half life) but not be a contamination problem
• decay quickly (short physical half life) but long enough to be produced and delivered to the exam site

Answer 2

I beleive they are different radioactive isotopes. Isotopes that may be used for imaging may also be used for therapy.

Here are some useful terms:
http://www.medicalimaging.org/about/glossary.cfm

And by properties, do you mean which radionuclides are used for imaging? Most radionuclides or isotopes have something called a half life, how much time till the energy being released is cut in half, then in half again, and so on. We need an x-ray tech to answer this question for you... good luck

Answer 3

Biological Properties Of Radionuclides

Answer 4

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Answer 5

your question demands a very long answer and is the matter of radiobiology course
However i would remark

The radionuclde must be specific of an organ. Example : Iodine is absorbed by thyroid so the radioisotope I131 can be used to scan the thyroid

The radioisotope must have a half life which is not too long ,since as radiations are harmful a long half life is damaging for healthy tissues
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