The 1-mm lead shield reduces the dose to female reproductive organs by about what percent?

The 1-mm lead shield reduces the dose to female reproductive organs by about what percent?

• A. 10%
• B. 50%
• C. 90 to 95%
• D. 100%

Answer: (B)

Shielding works by attenuating photons, reducing the amount of radiation that reaches sensitive tissues. In diagnostic imaging, most dose to female reproductive organs during pelvic or abdominal exams comes from scattered photons after the primary beam has interacted with the patient. A 1-millimeter lead shield blocks a substantial portion of those scattered photons, but not all of them, because scatter comes from multiple directions and some photons reach the organs around the shield’s edges or circumvent the shield. For typical exam energies and setups, this level of shielding yields about a 50% reduction in gonadal dose. Higher shielding thickness can increase attenuation, but practical factors like beam geometry, scatter distribution, and image quality prevent achieving near-total reduction.

Shielding works by attenuating photons, reducing the amount of radiation that reaches sensitive tissues. In diagnostic imaging, most dose to female reproductive organs during pelvic or abdominal exams comes from scattered photons after the primary beam has interacted with the patient. A 1-millimeter lead shield blocks a substantial portion of those scattered photons, but not all of them, because scatter comes from multiple directions and some photons reach the organs around the shield’s edges or circumvent the shield. For typical exam energies and setups, this level of shielding yields about a 50% reduction in gonadal dose. Higher shielding thickness can increase attenuation, but practical factors like beam geometry, scatter distribution, and image quality prevent achieving near-total reduction.