Which imaging technique visualizes physiologic performance of the body, including metabolic processes?

Which imaging technique visualizes physiologic performance of the body, including metabolic processes?

• A. Skull X-Ray
• B. Magnetic Resonance Imaging (MRI)
• C. Myelography
• D. Positron Emission Tomography (PET Scan)

Answer: (D)

This question is about imaging that shows how the body is actually functioning, including metabolic processes. PET scanning uses radiolabeled tracers that participate in cellular metabolism; tissues with higher metabolic activity take up more tracer and emit signals that are detected to create images of metabolic function. This lets you see physiologic performance, such as areas of high glucose uptake in tumors, brain activity, or viable heart tissue, rather than just structure. Skull X-rays show bone anatomy, MRI primarily provides detailed anatomical images (with functional MRI offering some functional data but not the standard metabolic view), and myelography maps the spinal canal with contrast. So PET scan is the best fit for visualizing physiologic performance and metabolic processes.

This question is about imaging that shows how the body is actually functioning, including metabolic processes. PET scanning uses radiolabeled tracers that participate in cellular metabolism; tissues with higher metabolic activity take up more tracer and emit signals that are detected to create images of metabolic function. This lets you see physiologic performance, such as areas of high glucose uptake in tumors, brain activity, or viable heart tissue, rather than just structure. Skull X-rays show bone anatomy, MRI primarily provides detailed anatomical images (with functional MRI offering some functional data but not the standard metabolic view), and myelography maps the spinal canal with contrast. So PET scan is the best fit for visualizing physiologic performance and metabolic processes.