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Treatment Technologies

PET/CT Scan

PET/CT Scan Overview
The Positron Emission Tomography (PET)-Computed Tomography (CT) scanner is the most accurate diagnostic tool available in the proper staging of cancer — often making further surgeries unnecessary. Individually, PET and CT scans are both exceptional tools used to pinpoint diseased tissues in the body. By combining the two technologies, however, we can view the most detailed, accurate images available for the diagnosis and monitoring of cancer. With more traditional approaches to diagnosis and staging, tiny metastic lesions (cancer that has spread) may be overlooked. In fact, in 30% of the cases where PET/CT scanning was used to "re-diagnose" patients, the scheduled treatment of their disease changed dramatically.

PET Scan
The PET scan studies the function (metabolism) of tissue by using isotopes (glucose-based radioactive material), primarily FDG. All cells in the body use glucose to produce energy, but cancer cells use nineteen times more glucose than healthy cells. When FDG isotopes enter cancer cells, they give off more energy. The PET scanner detects this excess energy and an image is created. This image is then combined with the CT scan image to produce a very detailed, anatomic picture.

CT Scan
CT Scan (CAT scan), also known as a computed tomography scan, studies the structure of the body. This high-tech computer linked x-ray machine takes a detailed series of fine "slice" images of the body, offering information about the anatomy such as the size, shape and pinpointed location of a tumor.

Unique Benefits
In addition to diagnosis and staging, the PET/CT scan is essential in re-staging, or detecting remaining cancer cells after our patients have already undergone treatment. Other benefits include:

  • One image shows all organ systems

  • Provides earlier diagnosis of disease

  • Shows how the body responds to treatment

  • Reduces need for invasive procedures

  • Avoids needless pain to the patient

  • Monitors effects of therapy

  • Replaces multiple tests

  • Effectively differentiates between scar tissue and tumor recurrence

To learn more about this progressive diagnostic procedure please speak with your physician or visit www.radiologyinfo.org