Which term describes the process used to determine the presence, amount and location of radioactive material in the body?

Which term describes the process used to determine the presence, amount and location of radioactive material in the body?

• A. Bioassay
• B. Dosimetry
• C. Radiography
• D. Spectrometry

Answer: (A)

Bioassay is the process used to determine whether radioactive material is present in the body, how much is there, and where it is located. It covers both in vivo measurements, like counting radiation emitted from the body or monitoring specific organs, and in vitro analyses of excreta such as urine or feces to estimate intake and distribution. This is different from dosimetry, which focuses on calculating the radiation dose the body has received from exposure, not directly measuring body burden. Radiography uses X-ray imaging to view anatomy and does not quantify internal radionuclide contamination. Spectrometry identifies and measures isotopes in samples by their radiation energy, but it’s typically applied to laboratory samples rather than assessing the body's internal contamination directly. Bioassay provides the information needed to assess internal contamination, estimate intake, and infer potential dose.

Bioassay is the process used to determine whether radioactive material is present in the body, how much is there, and where it is located. It covers both in vivo measurements, like counting radiation emitted from the body or monitoring specific organs, and in vitro analyses of excreta such as urine or feces to estimate intake and distribution. This is different from dosimetry, which focuses on calculating the radiation dose the body has received from exposure, not directly measuring body burden. Radiography uses X-ray imaging to view anatomy and does not quantify internal radionuclide contamination. Spectrometry identifies and measures isotopes in samples by their radiation energy, but it’s typically applied to laboratory samples rather than assessing the body's internal contamination directly. Bioassay provides the information needed to assess internal contamination, estimate intake, and infer potential dose.