AI Article Synopsis
- The paper outlines a method to estimate the levels of 241Am and 239Pu in human tissue using a portable High Purity Germanium detector (HPGe) by measuring the contaminant's depth.
- It explains how to calculate photopeak counts with a collimator and discusses the limitations of Minimum Detectable Activities (MDA) when using different detector configurations.
- Two specific methods for estimating the presence of 239Pu alongside 241Am are detailed, alongside a proposed optimal monitoring period for detecting low intake levels relevant to treatment procedures.
Article Abstract
This paper describes a procedure for the estimation of 241Am and 239Pu activity present in the human tissue by measuring the depth of contaminant using a portable Planar High Purity Germanium detector (HPGe). The ratios of photopeak counts of X-rays or gammas obtained with the detector coupled to collimator are calculated for the estimation of depth of the contaminant and the optimum one is determined. Since Minimum Detectable Activities (MDA) for the detector coupled to a collimator are higher than that of bare detector, activity must be estimated using bare detector, after locating the contaminant. Two methods are described for the estimation of plutonium coexisting with 241Am: (i) Abundance and isotopic correction for 239Pu (ii) and 239Pu:241Am ratio. The procedure to estimate 239Pu when plutonium isotopes alone are present is also established. An optimum monitoring period to detect the minimum value of intake for both radionuclides corresponding to chelation therapy and excision is also derived.
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| http://dx.doi.org/10.1093/rpd/ncae105 | DOI Listing |
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