Positron and computed tomography dual-scan - PET CT
Positron emission tomography-computed tomography (PET-CT), or simply "positron scan," combines positron emission tomography and computed tomography techniques to detect early-stage cancerous lesions, assess the size, distribution, activity, and spread of cancer cells. It can also be applied to neurological diseases such as primary brain tumors, Alzheimer's disease, and epilepsy.
Positron emission tomography (PET) scans can reveal changes in cellular metabolism. Because cancer cells absorb more glucose than normal cells, medical staff inject patients with a radioactive isotope drug called fluorodeoxyglucose (FDG) before the examination. The PET receiver detects the radiation-induced image, revealing cells that have absorbed more FDG. On the other hand, CT scans use X-rays to capture and collect data on body structures from different angles, producing high-resolution images. Therefore, combining the signals and images from PET and CT scans helps doctors accurately determine the location and condition of lesions.
Positron emission tomography (PET) scanning is suitable for most tumors because it has extremely high sensitivity to cellular metabolism, thus effectively identifying early-stage cancerous lesions and is widely used in cancer diagnosis.
Find out where the cancer is
- Determining the stage of cancer
- Determine if the tumor has spread
- Assist doctors in planning patient treatment plans, such as radiation therapy and chemotherapy.
- Evaluate treatment effectiveness
- Monitor for signs of recurrence
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