P3 Revision: Diagnosis using radioactive substances. (From the collins book)

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Radioactive Tracers.

  • A medical radioactive tracer is a radioactive substance that is either injected into, or swallowed by the patient.
  • Tracers are absorbed differently by different tissues.

How iodine-131 works.

  • Iodine-131 is a beta emittor with a half life of 8.1 days.
  • Iodine is injected into a patient with kidney problems


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