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What is a PET-CT Scan?

East Nagoya Imaging Diagnosis Center has about ten years of experience of positron emission tomography (PET) scanning. We recommend that you take cancer screening exams before there are any symptoms. A PET scan will help to find cancer at the earlier stage. The earlier the cancer is detected, the better the prognosis.

  A PET scan is mostly used in the diagnosis of cancer, especially lung cancer, colorectal cancer, head and neck cancers and lymphoma. It is also effective for dementia detection.

PET is "metabolic imaging" -- it detects changes in cells as they use energy to grow. It is good at identifying rapidly growing cells, such as cancer cells. PET scans can show cancers before anatomical changes are visible and can distinguish scar tissue from active tumors.

A PET scan is performed by injecting patients with a glucose-like substance called FDG, a radioactive tracer. The tracer is absorbed into tissues gradually. A PET camera detects the radiation coming from the patients’ body and malignancies light up as “hot spots” on the three-dimensional images constructed by a computer.

While a PET scan is used to examine activity of the cells, a CT and an MRI scan is used to evaluate the shape of organs and enable doctors to find abnormalities.

PET-CT system, MRI, ultrasonography and an endoscope examination will enable doctors to more accurately diagnose diseases.