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Paper Abstract and Keywords
Presentation 2026-03-05 13:54
Image Evaluation of a Whole-Body Whole Gamma Imaging System Using a Body Phantom -- Simulation-Based Performance Prediction --
Mizuki Miyahara (Chiba Univ.), Hideaki Tashima (QST), Mikio Suga (Chiba Univ.), Sodai Takyu, Go Akamatsu, Fumihiko Nishikido, Taiga Yamaya (QST) MI2025-73
Abstract (in Japanese) (See Japanese page) 
(in English) Whole gamma imaging (WGI) is a new nuclear medicine imaging method that combines PET and Compton imaging technologies. We have previously developed and evaluated small-animal-sized prototypes. In this study, we designed a clinical WGI system for human whole-body imaging. We evaluated the image quality characteristics of PET and Compton imaging through simulations using a body phantom containing $^{89}text{Zr}$. The results showed that 10 mm spheres were clearly visualized in the PET images. Conversely, in Compton images, distinguishing spheres of 22 mm or smaller was difficult due to the degradation of spatial resolution and increased noise resulting from the enlarged aperture. However, spheres of 28 mm or larger yielded contrast comparable to that of PET. These results demonstrate that, although Compton imaging presents lower image quality, it allows for the acquisition of information from different nuclides in addition to PET, offering a promising outlook for simultaneous multi-functional imaging.
Keyword (in Japanese) (See Japanese page) 
(in English) Whole gamma imaging / PET / Compton camera / Geant4 / Zr-89 / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 395, MI2025-73, pp. 55-58, March 2026.
Paper # MI2025-73 
Date of Issue 2026-02-26 (MI) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF MI2025-73

Conference Information
Committee MI  
Conference Date 2026-03-05 - 2026-03-06 
Place (in Japanese) (See Japanese page) 
Place (in English) OKINAWAKEN SEINENKAIKAN 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Medical Imaging, etc. 
Paper Information
Registration To MI 
Conference Code 2026-03-MI 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Image Evaluation of a Whole-Body Whole Gamma Imaging System Using a Body Phantom 
Sub Title (in English) Simulation-Based Performance Prediction 
Keyword(1) Whole gamma imaging  
Keyword(2) PET  
Keyword(3) Compton camera  
Keyword(4) Geant4  
Keyword(5) Zr-89  
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Keyword(7)  
Keyword(8)  
1st Author's Name Mizuki Miyahara  
1st Author's Affiliation Chiba University (Chiba Univ.)
2nd Author's Name Hideaki Tashima  
2nd Author's Affiliation National Institutes for Quantum Science and Technology (QST)
3rd Author's Name Mikio Suga  
3rd Author's Affiliation Chiba University (Chiba Univ.)
4th Author's Name Sodai Takyu  
4th Author's Affiliation National Institutes for Quantum Science and Technology (QST)
5th Author's Name Go Akamatsu  
5th Author's Affiliation National Institutes for Quantum Science and Technology (QST)
6th Author's Name Fumihiko Nishikido  
6th Author's Affiliation National Institutes for Quantum Science and Technology (QST)
7th Author's Name Taiga Yamaya  
7th Author's Affiliation National Institutes for Quantum Science and Technology (QST)
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Speaker Author-1 
Date Time 2026-03-05 13:54:00 
Presentation Time 13 minutes 
Registration for MI 
Paper # MI2025-73 
Volume (vol) vol.125 
Number (no) no.395 
Page pp.55-58 
#Pages 4 
Date of Issue 2026-02-26 (MI) 

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