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Development of sealed 22Na phantoms for PET system QA/QC: uniformity and stability evaluation

https://repo.qst.go.jp/records/79960
https://repo.qst.go.jp/records/79960
dcb91dec-9ad9-4fa3-b5e8-9bf1fc1eebff
Item type 会議発表論文 / Conference Paper(1)
公開日 2020-05-14
タイトル
タイトル Development of sealed 22Na phantoms for PET system QA/QC: uniformity and stability evaluation
言語
言語 eng
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_5794
資源タイプ conference paper
アクセス権
アクセス権 metadata only access
アクセス権URI http://purl.org/coar/access_right/c_14cb
著者 Akamatsu, Go

× Akamatsu, Go

WEKO 867451

Akamatsu, Go

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Yoshida, Eiji

× Yoshida, Eiji

WEKO 867452

Yoshida, Eiji

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Mikamoto, Takahiro

× Mikamoto, Takahiro

WEKO 867453

Mikamoto, Takahiro

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Maeda, Takamasa

× Maeda, Takamasa

WEKO 867454

Maeda, Takamasa

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Wakizaka, Hidekatsu

× Wakizaka, Hidekatsu

WEKO 867455

Wakizaka, Hidekatsu

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Tashima, Hideaki

× Tashima, Hideaki

WEKO 867456

Tashima, Hideaki

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Wakitani, Yuichiro

× Wakitani, Yuichiro

WEKO 867457

Wakitani, Yuichiro

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Matsumoto, Mikio

× Matsumoto, Mikio

WEKO 867458

Matsumoto, Mikio

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Yamaya, Taiga

× Yamaya, Taiga

WEKO 867459

Yamaya, Taiga

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Akamatsu, Go

× Akamatsu, Go

WEKO 867460

en Akamatsu, Go

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Yoshida, Eiji

× Yoshida, Eiji

WEKO 867461

en Yoshida, Eiji

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Maeda, Takamasa

× Maeda, Takamasa

WEKO 867462

en Maeda, Takamasa

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Wakizaka, Hidekatsu

× Wakizaka, Hidekatsu

WEKO 867463

en Wakizaka, Hidekatsu

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Tashima, Hideaki

× Tashima, Hideaki

WEKO 867464

en Tashima, Hideaki

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Yamaya, Taiga

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WEKO 867465

en Yamaya, Taiga

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抄録
内容記述タイプ Abstract
内容記述 Sodium-22 is a radioisotope which is typically used as a calibration point source for PET. Its half-life of 2.6 years is suitably long enough while its positron range is as small as that of 18 F. However, the use of 22 Na has been limited to a point-like shape. In this work, with the help of the Japan Radioisotope Association, we proposed a wider variety of 22Na sealed phantoms. As examples, we developed three types of 22 Na phantoms: a 5-cm cylinder, a 60-cm flexible tube and a Derenzo-like multi-rod phantom. These were designed for PET system quality assurance and quality control (QA/QC) and performance measurements. At first, in this work, we evaluated uniformity and long-term stability of radioactivity distributions of these phantoms. These phantoms were scanned by the Biograph mCT Flow PET/CT scanner four times during 446 days. The uniformity of radioactivity distributions was evaluated by visual qualitative assessment and region-of-interest (ROI)-based quantitative assessment. In the case of the Derenzo-like phantom, we additionally scanned the phantom using the helmet-type PET prototype and Inveon small-animal PET system. In addition, we measured the radioactivity of these phantoms using the dose calibrator (Atomlab 500) six times during 300 days and we compared the measured and ideal decay curves. As a result, we found the variability of radioactivity distributions was lower than the 5% variation for the cylinder and tube phantoms. The Inveon PET visualized the smallest hot rod (1.6 mm diameter) of the Derenzo-like phantom and the radioactivity seemed to be uniformly distributed. The measured decay curves of all phantoms almost followed their respective ideal decay curve. We confirmed these phantoms have good uniformity and enough stability for PET system evaluation. They enable to evaluate and calibrate PET systems without radioactive solutions (ex. 18F).
書誌情報 2019 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)

発行日 2020-04
出版者
出版者 IEEE
ISSN
収録物識別子タイプ ISSN
収録物識別子 2577-0829
ISBN
識別子タイプ ISBN
関連識別子 978-1-7281-4164-0
DOI
識別子タイプ DOI
関連識別子 10.1109/NSS/MIC42101.2019.9059761
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