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    PET-CT Guided Radiotherapy

    A positron emission tomography (PET) scan is a diagnostic tool utilised to visualise the metabolic or biochemical functioning of tissues and organs. This imaging technique involves the administration of a radioactive compound to highlight normal and abnormal metabolic activities.

    PET-CT scans are indispensable for individuals with cancer as they offer intricate images helping doctors in discerning the most optimal treatment strategies. These scans are known to be extremely precise tests. They help doctors deliver radiation directly to tumours, avoiding harm to healthy tissue. This technology is vital for ensuring cancer patients get the best treatments with fewer side effects.

    At Apollo Cancer Centre, Hyderabad, we are proud to be a leading choice for PET-CT scans. Our experienced doctors are dedicated to delivering the best outcomes for you.

    Which Medical Device Is Utilised in This Procedure?

    A PET scanner is used for this procedure. It resembles a large machine with a round, donut-shaped hole, akin to a CT or MRI unit.

    • Inside the PET scanner, multiple rings of detectors record energy emissions from the radiotracer in your body.
    • The CT scanner is typically a large, donut-shaped machine with a short tunnel where you lie on a narrow table.
    • The x-ray tube and electronic x-ray detectors rotate around you in a ring called a gantry.
    • The computer workstation, situated in a separate control room, processes imaging information while the technologist operates the scanner and monitors your exam.
    • The technologist communicates with you using a speaker and microphone.
    • Combined PET/CT scanners resemble both PET and CT scanners.
    • Images are created by a computer using data from the gamma camera. 

    Benefits of PET-CT Radiotherapy

    • Detect cancer and/or make a diagnosis.
    • Determine cancer spread in the body.
    • Assess treatment effectiveness.
    • Identify cancer recurrence post-treatment.
    • Evaluate prognosis.
    • Assess tissue metabolism and viability.
    • Determine the effects of a heart attack (myocardial infarction) on heart areas.
    • Identify heart muscle areas for angioplasty or coronary artery bypass surgery (with a myocardial perfusion scan).
    • Evaluate brain abnormalities, including tumours, memory disorders, seizures, and other central nervous system issues.
    • Map normal human brain and heart function.

    Pre-Procedure Care

    • Abstain from eating for four hours before diagnosis.
    • Refrain from intense physical activity for a few days before the scan.
    • Inform the medical team about any past medical issues, including allergic reactions, diabetes, pregnancy, or breastfeeding.

    Procedure for PET-CT Radiotherapy

    • You will recline on a slim, comfortable table and will gently slide into the scanner, resembling a doughnut hole.
    • Radioactive tracers will be introduced into your body, usually via an IV.
    • Afterward, there will be a brief wait for the tracer to spread throughout your body.
    • The scanner will revolve around you, capturing detailed internal images.
    • Typically, a PET-CT scan lasts about 30 minutes.

    Why Is PET-CT Important in Treatment Planning?

    Spotting Targeted Regions: PET-CT aids in pinpointing regions requiring radiation, allowing doctors to customise treatment plans. Additionally, it assists in identifying areas to avoid during radiation therapy, thereby minimising potential side effects.

    Track Advancement: PET-CT enables doctors to track their patient’s treatment progress and make adjustments as needed during therapy. This ensures treatment effectiveness while reducing potential side effects.

    Bring Dosage Level: By combining PET and CT scans, doctors can accurately calculate dosage levels for treatment plans tailored to each patient’s needs. This ensures that dose levels are low enough to be safe but high enough to treat cancer cells effectively.

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    FAQ's

    Potential risks include: ● Radiation exposure to an unborn baby if pregnant. ● Radiation exposure to a breastfeeding child. ● Rare possibility of an allergic reaction.

    ● Nuclear medicine procedures can be time-consuming, often taking several hours to days for the radiotracer to accumulate in the area of interest. ● Imaging may also require several hours to perform, but newer equipment can reduce procedure times significantly.

    PET-CT scans are generally safe for people of all ages and medical backgrounds. Talking about your medical history with your doctor is important since some medical conditions or medications may need particular consideration.
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