Which of the following types of personal dosimetry is direct/immediate read?

Pocket dosimetry is a type of personal dosimetry that provides direct or immediate reading of radiation exposure. This type of dosimeter resembles a small pen and contains a crystal that reacts to radiation exposure. When the dosimeter is used, the ionization caused by incoming radiation results in a visible change in the crystal, which indicates the level of exposure.

Several factors contribute to the effectiveness of pocket dosimetry. The immediate availability of data enables radiation workers to quickly assess their current exposure and make informed decisions about their safety. Additionally, pocket dosimeters are sensitive to a wide range of radiation levels, making them useful in environments where radiation exposure may vary.

In contrast, thermoluminescence dosimetry, optically stimulated dosimetry, and bioassay are not designed for immediate readings. Thermoluminescence dosimetry and optically stimulated dosimetry require processing and analysis of the dosimeter after exposure has occurred to determine the amount of radiation absorbed, which would take additional time to provide accurate results. Bioassay involves analyzing biological samples to determine the uptake of radioactive materials, and it too does not yield immediate feedback on radiation exposure.

Therefore, pocket dosimetry is the clear choice for personal dosimetry when