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01-06-2010 | Technical Note

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

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

Published in: Annals of Nuclear Medicine | Issue 5/2010

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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Title: Point-like radioactive source with multiple absorber capsules for evaluating PET scanners
Authors: Tomoyuki Hasegawa
Eiji Yoshida
Yasushi Sato
Keiichi Oda
Yasuhiro Wada
Takahiro Yamada
Taiga Yamaya
Hideo Murayama
Kyoko Saito
Publication date: 01-06-2010
Publisher: Springer Japan
Published in: Annals of Nuclear Medicine / Issue 5/2010
Print ISSN: 0914-7187
Electronic ISSN: 1864-6433
DOI: https://doi.org/10.1007/s12149-010-0350-5

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Springer Medicine

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

Abstract

Objective

Methods

Results

Conclusion

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Objective

Methods

Results

Conclusion

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