Improved localization of a "hot spot" in the lungs for an array of four HPGe detectors - The simultaneous use of two gamma energies

O. Pelled; S. Tsroya; U. German; A. Abraham; Z. B. Alfassi

doi:10.1016/j.nima.2005.06.056

Improved localization of a "hot spot" in the lungs for an array of four HPGe detectors - The simultaneous use of two gamma energies

O. Pelled, S. Tsroya, U. German, A. Abraham, Z. B. Alfassi

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Significant errors in the determination of radioactivity in lungs are caused by the usual assumption of homogeneous distribution, while actually the radioactive contamination can be in the form of a "hot spot". Modern Lung Counter systems use several HPGe detectors, and the ratio of the different count rates of the detectors can be used to locate the "hot spot" and apply correction algorithms for activity calculation. An average error of only 9.5%, can be obtained when using this information for detection of a natural uranium point source in the lungs, when the analysis is based on either the 186 or the 92 keV peaks. In the present paper it is shown that the uncertainty can be further reduced to about 3.8%, if the two gamma energy peaks (186 and 92 keV) are analyzed simultaneously for the localization of the uranium point source.

Original language	English
Pages (from-to)	553-562
Number of pages	10
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	551
Issue number	2-3
DOIs	https://doi.org/10.1016/j.nima.2005.06.056
State	Published - 11 Oct 2005

Keywords

Location
Lung Counter
Lungs
Point source
Test of similarity
Uranium

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

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10.1016/j.nima.2005.06.056

Cite this

Pelled, O., Tsroya, S., German, U., Abraham, A., & Alfassi, Z. B. (2005). Improved localization of a "hot spot" in the lungs for an array of four HPGe detectors - The simultaneous use of two gamma energies. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 551(2-3), 553-562. https://doi.org/10.1016/j.nima.2005.06.056

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abstract = "Significant errors in the determination of radioactivity in lungs are caused by the usual assumption of homogeneous distribution, while actually the radioactive contamination can be in the form of a {"}hot spot{"}. Modern Lung Counter systems use several HPGe detectors, and the ratio of the different count rates of the detectors can be used to locate the {"}hot spot{"} and apply correction algorithms for activity calculation. An average error of only 9.5%, can be obtained when using this information for detection of a natural uranium point source in the lungs, when the analysis is based on either the 186 or the 92 keV peaks. In the present paper it is shown that the uncertainty can be further reduced to about 3.8%, if the two gamma energy peaks (186 and 92 keV) are analyzed simultaneously for the localization of the uranium point source.",

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Pelled, O, Tsroya, S, German, U, Abraham, A & Alfassi, ZB 2005, 'Improved localization of a "hot spot" in the lungs for an array of four HPGe detectors - The simultaneous use of two gamma energies', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 551, no. 2-3, pp. 553-562. https://doi.org/10.1016/j.nima.2005.06.056

Improved localization of a "hot spot" in the lungs for an array of four HPGe detectors - The simultaneous use of two gamma energies. / Pelled, O.; Tsroya, S.; German, U. et al.
In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 551, No. 2-3, 11.10.2005, p. 553-562.

Research output: Contribution to journal › Article › peer-review

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AU - Pelled, O.

AU - Tsroya, S.

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AU - Abraham, A.

AU - Alfassi, Z. B.

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AB - Significant errors in the determination of radioactivity in lungs are caused by the usual assumption of homogeneous distribution, while actually the radioactive contamination can be in the form of a "hot spot". Modern Lung Counter systems use several HPGe detectors, and the ratio of the different count rates of the detectors can be used to locate the "hot spot" and apply correction algorithms for activity calculation. An average error of only 9.5%, can be obtained when using this information for detection of a natural uranium point source in the lungs, when the analysis is based on either the 186 or the 92 keV peaks. In the present paper it is shown that the uncertainty can be further reduced to about 3.8%, if the two gamma energy peaks (186 and 92 keV) are analyzed simultaneously for the localization of the uranium point source.

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Pelled O, Tsroya S, German U, Abraham A, Alfassi ZB. Improved localization of a "hot spot" in the lungs for an array of four HPGe detectors - The simultaneous use of two gamma energies. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2005 Oct 11;551(2-3):553-562. doi: 10.1016/j.nima.2005.06.056

Improved localization of a "hot spot" in the lungs for an array of four HPGe detectors - The simultaneous use of two gamma energies

Abstract

Keywords

ASJC Scopus subject areas

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