Which test exposes patients to more radiation? Is it PET scan or CT scan?

It depends. on the technical parameters of the scans, particularly the CT scan. The exposure from the CT scan could potentially be more, about the same, or lass than a PET scan.

Related Questions

Is Full body PET scan or CT scan better for diagnosing Lymphoma? Which uses less radiation?

Both. The actual diagnosis of lymphoma requires tissue, usually excisional biopsy of an entire lymph node. Staging to see where other sites of disease could be is done with a combined PET/CT. The staging used to matter more many years ago when they would often give XRT or do surgery, it doesn't matter as much as it used to because almost everybody gets systemic chemotherapy for both Hodkins and non H. Read more...