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01.06.2010 | Technical Note

Point-like radioactive source with multiple absorber capsules for evaluating PET scanners

verfasst von: Tomoyuki Hasegawa, Eiji Yoshida, Yasushi Sato, Keiichi Oda, Yasuhiro Wada, Takahiro Yamada, Taiga Yamaya, Hideo Murayama, Kyoko Saito

Erschienen in: Annals of Nuclear Medicine | Ausgabe 5/2010

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Abstract

Objective

Radioactive sources for evaluating sensitivity and uncertainty in the radioactivity measurements performed using PET scanners must be equipped with absorber materials that ensure the annihilation of positrons. Attenuation and scattering owing to the absorber materials produce uncertainty in the performance evaluation. The aim of this study is to propose a point-like radioactive source with multiple absorber capsules, for which evaluation can be independent of scatter and attenuation owing to the source absorbers.

Methods

The point-like source consists of a small spherical radioactive part and a set of successively sized cylindrical aluminum absorber capsules. Data were collected for different total absorber thicknesses. By an extrapolation technique, the effects of the source absorbers were eliminated. Sensitivity and uncertainty in the radioactivity measurements of PET scanners were evaluated with this technique.

Results

Sensitivity and uncertainty of radioactivity measurement to the point-like radioactive source were evaluated successfully with this method.

Conclusion

The proposed point-like radioactive source is useful for evaluating performance characteristics of PET scanners in a way that is independent of the effects of the source absorbers.

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Titel: Point-like radioactive source with multiple absorber capsules for evaluating PET scanners
verfasst von: Tomoyuki Hasegawa
Eiji Yoshida
Yasushi Sato
Keiichi Oda
Yasuhiro Wada
Takahiro Yamada
Taiga Yamaya
Hideo Murayama
Kyoko Saito
Publikationsdatum: 01.06.2010
Verlag: Springer Japan
Erschienen in: Annals of Nuclear Medicine / Ausgabe 5/2010
Print ISSN: 0914-7187
Elektronische ISSN: 1864-6433
DOI: https://doi.org/10.1007/s12149-010-0350-5

Klimawandel und Gesundheit: Was Sie in der Hausarztpraxis wissen müssen und tun können

Springer Medizin

Point-like radioactive source with multiple absorber capsules for evaluating PET scanners

Abstract

Objective

Methods

Results

Conclusion

Klimawandel und Gesundheit: Was Sie in der Hausarztpraxis wissen müssen und tun können

Springer Medizin

Abstract

Objective

Methods

Results

Conclusion

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