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how do radionuclides used for diagnostic purposes differ from radionuclides used

ID: 536317 • Letter: H

Question

how do radionuclides used for diagnostic purposes differ from radionuclides used for therapeutic purpose?



5. Using complete sentences, describe the difference between fusion and fission. Thi main 6. Identify two sources of naturally occurring radioactivity and two examples of synthetic radioactivity 7. How do radionuclides used for diagnostic purposes differ form radionuclides used for therapeutic purposes? 8. List alpha, beta and gamma radiation in order of increasing penetrating power 9. What is the difference between a PET and a CAT scan? 10. List and define three common units of radiation. If possible include why that particular unit is useful.

Explanation / Answer

The radioisotope that generates the radiation can be localised in the required organ in the same way it is used for diagnosis – through a radioactive element following its usual biological path, or through the element being attached to a suitable biological compound. For therapy, or killing certain cells strong beta emitter with gamma rays(for image) is used.

The diagnostics isotopes emit gamma only for tagging. Most common being technetium-99