Which of the following devices have the disadvantage of 'no permanent record' of radiation exposure? 1) pocket ionization chamber 2) film badge 3) thermoluminescent dosimeter (TLD)

• A. 1 and 2
• B. 1 and 3
• C. 2 and 3
• D. 1, 2, and 3

Answer: (B)

Understanding which dosimeters provide a permanent record of exposure is essential for keeping an accurate dose history. A pocket ionization chamber gives an immediate dose reading at the time of use, but it does not store a long-term, built-in record of past exposures unless someone manually logs it. A thermoluminescent dosimeter is read out later with a reader and then reset; the device itself doesn’t hold a persistent dose history, and the permanent record is maintained by the dosimetry program, not by the device. In contrast, a film badge develops into a physical record that can be archived and reviewed over time, providing a permanent record of exposure. Therefore, the devices without a built-in permanent record are the pocket dosimeter and the thermoluminescent dosimeter.