Which set of areas are correctly identified as shielded regions during radiographic exposure?

• A. Gonads, breasts, lens of the eye
• B. Heart, lungs, liver
• C. Kidneys, spleen, pancreas
• D. Muscles, bones, joints

Answer: (A)

Protecting radiosensitive tissues that are not part of the immediate diagnostic area is the goal of shielding during radiographic exposure. The gonads, breasts, and lens of the eye are among the tissues most sensitive to ionizing radiation, so shielding them helps reduce the risk of genetic effects, breast cancer risk, and cataracts, respectively. That’s why this set is identified as shielded regions—the three tissues in question are prioritized for shielding to minimize unnecessary dose while still obtaining a usable image.

Shields for the heart, lungs, or liver would interfere with the diagnostic image in that region, so shielding isn’t used there when those organs need to be evaluated. Shielding kidneys, spleen, or pancreas in abdominal exams would obscure important anatomy, so those aren’t considered shielded regions in standard practice. Muscles, bones, and joints aren’t typically shielded because they’re not as radiosensitive, and shielding them would degrade image quality without providing meaningful dose reduction.

In short, shielding focuses on highly radiosensitive tissues not essential to the diagnostic area, which is why gonads, breasts, and the lens of the eye are correctly identified as shielded regions.