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PET Scans for Lymphoma: What Patients Need to Know
Published: Sep 17, 2024
Positron Emission Tomography (PET) scans are a powerful tool for diagnosing and monitoring lymphoma. Understanding how they work can help patients feel more prepared for this important test.
What is a PET Scan?
A PET scan is an imaging test that uses a special dye with radioactive tracers. These tracers are injected into a vein and are absorbed by organs and tissues. The PET scanner detects the radiation given off by the tracers, creating detailed 3D images of the inside of your body. For lymphoma, PET scans are often combined with CT scans for even more detailed images.
How PET Scans Help with Lymphoma
PET scans are particularly useful for lymphoma because they can show areas of active cancer cells. This helps doctors determine the stage of the lymphoma and how far it has spread. PET scans are also used to monitor how well treatment is working and to check for any remaining cancer after treatment is completed.
Preparing for a PET Scan
Before a PET scan, you'll need to avoid eating for several hours. You may also need to avoid strenuous exercise and certain medications. The scan itself is painless, but you'll need to lie still for about 30 minutes. The entire process, including preparation and waiting time, can take 2-3 hours.
Understanding PET Scan Results
PET scan results are usually available within a few days. Areas of high tracer uptake appear brighter on the scan and may indicate active cancer cells. However, not all bright areas are cancer - inflammation or infection can also cause increased tracer uptake. Your doctor will interpret the results in context with your other tests and symptoms.
Frequently Asked Questions
Yes, the radiation exposure is low and considered safe for most people.
It varies, but typically at diagnosis, during treatment, and for follow-up.
Most types are visible, but some slow-growing lymphomas may not show up well.
Drink plenty of water to flush the tracer from your system.
Most insurance plans cover PET scans for cancer diagnosis and monitoring.
The Bottom Line
PET scans are a valuable tool in the fight against lymphoma, providing crucial information to guide your care.
References
- Cheson BD, et al. Recommendations for initial evaluation, staging, and response assessment of Hodgkin and non-Hodgkin lymphoma: the Lugano classification. J Clin Oncol 2014; 32:3059.
- Barrington SF, et al. Role of imaging in the staging and response assessment of lymphoma: consensus of the International Conference on Malignant Lymphomas Imaging Working Group. J Clin Oncol 2014; 32:3048.
- Weiler-Sagie M, et al. (18)F-FDG avidity in lymphoma readdressed: a study of 766 patients. J Nucl Med 2010; 51:25.
This article has been reviewed for accuracy by one of the licensed medical doctors working for Doctronic. Always discuss health information with your healthcare provider.
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