Ammonia N-13

Ammonia N-13 is a type of radioisotope used in positron emission tomography (PET) scans. It is a radionuclide produced by cyclotrons and is used in medical imaging to assess the blood flow in the heart.

Production

Ammonia N-13 is produced by proton irradiation of water in a cyclotron. The process involves the bombardment of water with protons, which results in the production of oxygen-16 and a free neutron. This neutron then reacts with a nitrogen-14 atom to produce ammonia N-13.

Use in Medical Imaging

In medical imaging, Ammonia N-13 is used as a radiotracer in PET scans. It is injected into the patient's bloodstream and travels to the heart. The PET scanner then detects the gamma rays emitted by the decaying Ammonia N-13 and uses this information to create images of the heart. This allows doctors to assess the blood flow in the heart and detect any abnormalities.

Safety and Risks

As with any medical procedure, there are potential risks associated with the use of Ammonia N-13 in PET scans. These include allergic reactions to the radiotracer and exposure to radiation. However, the amount of radiation a patient is exposed to during a PET scan is typically low and is considered safe for most patients.

See Also

• Positron Emission Tomography
• Radioisotope
• Cyclotron
• Radiotracer