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Bioenvironmental Engineering Apprentice (BEA) Block 7 – Ionizing Radiation Practice Test

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In medical settings, X-rays are used for which purposes?
Correct Answer:
Diagnostic and Therapeutic
Explanation:
In medicine, X-rays serve both imaging and treatment roles. For diagnosis, X-rays provide internal pictures by passing through tissues and being detected to show differences in density—bones appear bright, soft tissues show as varying shades, and techniques like radiography, CT, and fluoroscopy reveal anatomy and pathology. For therapy, higher-energy X-rays are used to damage the DNA of cancer cells, delivering radiotherapy that targets tumors while sparing healthy tissue through careful planning and dosing. Imaging is often used to guide and verify treatment as well (image-guided radiotherapy). Because X-rays are used in both imaging and treatment in medical settings, the correct concept is diagnostic and therapeutic.

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