What is an “Abnormal Glow Curve” and what causes it to show up on my Dose Report?
Cody Miles | July 4, 2018
Badges are read by heating internal phosphors until the absorbed energy from ionizing radiation is released in the form of light. The light that is emitted is then converted into dose by a computer algorithm. An image of the light output is stored in our database as a glow curve. If any contaminant, such as oil or debris, has reached the phosphor, it will emit light, giving the glow curve an image that is not typical of ionizing radiation. When this happens, the reading is flagged on the Dose Report. While it is apparent that a badge has been exposed to a contaminant, it is impossible to determine how much of the light output is from the contamination, and how much is from ionizing radiation. The dose is reported based on the total emitted light, but is flagged on the Dose Report as an “estimate” due to the abnormal glow curve. This affords the customer the opportunity to evaluate a wearer’s history and provide an estimated dose if applicable.
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