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

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…