What is the meaning of radionuclide scanning?? is it same with nuklir test??

Yes,: radionuclide scanning is the same thing as a nuclear medicine scan. There are a variety on isotopes used for various indications. The radioactive substance is injected into the body, and the scan is obtained with a camera sensitive too the photons released by the agent.

Same: Nuclear scans involve the ingestion, intravenous injection, inhalation, subcutaneous injection , instillation into the bladder of isotopes, radiotracers, in order to define function of various organs of the body, heart, lungs, bones, liver/spleen, stomach, thyroid gland, lymph system, kidneys, bladder, brain, parathyroid gland and gall bladder. Normal values for adults and children are known.

Bascially: radionucleide and nuclear refer to same imaging idea - inject an isotope and image where it goes. these tests are used to assess for coronary disease, heart function, damage assessment among other things