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Why choose Geisinger for a PET/CT scan?

A PET/CT scan combines positron emission tomography (PET) and low dose computed tomography (CT) into a single imaging exam. A PET scan reveals how your tissues and organs are functioning, while a CT scan produces detailed images of your body's internal structures. Together, they give your care team a more complete picture — helping identify disease earlier, support accurate diagnoses and guide the right treatment plan.

Our radiology specialists use PET/CT imaging to evaluate a variety of complex conditions, including cancer, inflammatory conditions and neurological disorders. The exam is noninvasive and provides highly detailed images, helping your providers see changes that may not be visible with other imaging tests alone. 

Results are reviewed quickly and shared across your care team, so your providers can act on them right away. To get started, you’ll need to get a referral from your doctor.

Conditions we help diagnose

Related specialties

FAQs

What’s a PET/CT scan?

A PET/CT scan combines 2 imaging technologies into 1 exam. The PET component uses a small amount of radioactive tracer to show how your tissues and organs are functioning. The CT component uses X-rays to produce detailed images of structures inside your body. Together, they provide a more complete picture to help your care team diagnose and monitor disease.

What’s the difference between a PET scan and a CT scan?

A CT scan shows detailed images of organs, bones and other structures. A PET scan shows how tissues and organs are functioning by visualizing uptake of the radioactive tracer. When combined in a PET/CT scan, doctors can see both structure and function in a single exam.

Why do I need a PET/CT scan?

Your doctor may order a PET/CT scan to diagnose a condition, determine if a disease has spread, monitor treatment response or evaluate changes in your health. PET/CT scans are commonly used for cancer care and certain neurological conditions.

What happens during a PET/CT scan?

Before the scan, you'll receive a radiotracer (a short-lived, low-energy radioactive material), usually through an IV. You'll wait while the tracer travels through your body. During the scan, you'll lie on a table that moves through the imaging machine while images are taken. Your care team will give you specific instructions before your appointment.

Do I need a referral for a PET/CT scan?

Yes, a referral from your provider is required before you can schedule a PET/CT scan. Once you have a referral, you can call to schedule your appointment.

PET/CT scans at Geisinger 

Our radiology specialists use advanced technology and work closely with providers across specialties to support accurate diagnoses and personalized treatment planning. We offer:

  • Accredited imaging services: Our imaging facilities and procedures are accredited through the American College of Radiology, reflecting nationally recognized standards for quality and safety.
  • Advanced imaging technology: The digital imaging systems we use yield detailed images that help providers diagnose and monitor complex conditions with greater precision.
  • Imaging close to home: You shouldn't have to travel far for advanced imaging. Our PET/CT services are available at multiple convenient locations in central, northeastern and western Pennsylvania.