Medical imaging — X-rays, ultrasound, CT, MRI, PET — extends clinical vision into the body's interior, and each technology reveals different aspects of anatomy and function with different trade-offs in radiation exposure, cost, and resolution. Understanding which imaging study is appropriate for which question, what it can and cannot show, and what the limitations of image interpretation are helps patients participate more meaningfully in decisions about their care. The incidental finding — an abnormality discovered while looking for something else — is one of imaging's most common challenges, and knowing how to approach uncertainty in results is part of navigating it well.
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