Certified Healthcare Constructor (CHC) Exam 2025 – 400 Free Practice Questions to Pass the Exam

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What type of radiation is used in a positron emission tomography (PET) scan for imaging?

X-rays

Ultrasound waves

Intravenous radioactive materials

Positron emission tomography (PET) scans utilize intravenous radioactive materials, commonly referred to as radiotracers. These materials are injected into the patient's bloodstream and emit positrons as they decay. When these positrons encounter electrons in the body, they annihilate each other and produce gamma rays. The PET scanner detects these gamma rays and uses the information to create detailed images of metabolic processes in the body.

This modality is highly effective for diagnosing and monitoring conditions such as cancer, as it highlights areas of increased metabolic activity, which often correspond to tumors. The use of radioactive materials is essential for the operation of PET scans, making them distinct from other imaging techniques like X-rays, ultrasounds, or magnetic resonance imaging, which rely on different physical principles for imaging.

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Magnetic resonance imaging

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