Guide To Positron Emission Tomography Scans (PET Scans)
Risks Of A PET Scan
Positron emission tomography scans have fewer risks associated with them than those of MRI scans, CT scans, and standard x-rays. A minimal amount of radiation exposure will occur during a positron emission tomography scan because a radiotracer chemical is used. Radiotracer chemicals may also be referred to as radionuclides, radiopharmaceuticals, or radioactive tracers. Radiotracers used in positron emission tomography scans are a molecule that contains glucose and an attached radioactive component.
A patient can have an allergic reaction to the substances used as the radioactive tracer. Individuals who are allergic to aspartame, saccharin, and iodine are at a greater risk of experiencing problems during their positron emission tomography scan. Asthma, heart disease, dehydration, and kidney disease patients at a greater risk of experiencing complications from a PET scan. This also applies to those who take beta-blockers, nonsteroidal anti-inflammatories, or interleukin-2.
PET Scans And Pregnancy
In the vast majority of cases, the benefits of positron emission tomography scans outweigh the risks associated with them. However, this may not be the case for many pregnant women. Many doctors say that the radioactive material used in these scans can negatively affect the unborn baby. Thus, pregnant women often do not undergo positron emission tomography scans except in extremely specific circumstances.
The effect of the radioactive material on babies is also why women must take precautions when they are breastfeeding. In some cases, doctors will order a positron emission tomography scan for a woman who is breastfeeding. These women often need to pump and discard their breast milk until the radioactive material is gone. Women need to consult their doctor on the timing of this. Finally, some patients who have gotten a positron emission tomography scan will need to avoid pregnant women and small children for a few hours. Once again, they should ask their doctor about this.
