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Paper Abstract and Keywords
Presentation 2026-07-03 15:35
Sequential Selection of CT Projection Angles based on Statistical Anisotropy: Dose Reduction via Variance-Driven Exploration
Shunta Nonaga, Koji Tabata (Hokkaido Univ.), Junya Honda (Kyoto Univ.), Hiroyuki Kudo (University of Tsukuba), Wataru Yashiro (Tohoku Univ.), Tamiki Komatsuzaki (Hokkaido Univ.) NC2026-15 IBISML2026-15
Abstract (in Japanese) (See Japanese page) 
(in English) We propose ``SAVER'' (Stochastic Adaptive Variance-Driven Exploration and Reconstruction), an adaptive acquisition framework that sequentially optimizes projection angles to achieve both radiation dose reduction and high-quality image reconstruction in Computed Tomography (CT). By estimating an object's structural anisotropy in real time from the statistical variance of acquired data, SAVER prioritizes selecting informative projection directions via a Softmax-based stochastic scheduling scheme with simulated annealing. Numerical experiments demonstrate that the proposed method achieves significantly lower reconstruction error and requires fewer exposures than conventional protocols. Furthermore, the framework exhibits robust performance even under significant measurement noise, marking a shift toward data-driven, personalized CT acquisition.
Keyword (in Japanese) (See Japanese page) 
(in English) Computed Tomography / Stochastic Scheduling / Data-Driven Exploration / / / / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 91, IBISML2026-15, pp. 69-76, July 2026.
Paper # IBISML2026-15 
Date of Issue 2026-06-25 (NC, IBISML) 
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 NC2026-15 IBISML2026-15

Conference Information
Committee NC IBISML IPSJ-BIO IPSJ-MPS  
Conference Date 2026-07-01 - 2026-07-03 
Place (in Japanese) (See Japanese page) 
Place (in English) OIST 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To IBISML 
Conference Code 2026-07-NC-IBISML-BIO-MPS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Sequential Selection of CT Projection Angles based on Statistical Anisotropy: Dose Reduction via Variance-Driven Exploration 
Sub Title (in English)  
Keyword(1) Computed Tomography  
Keyword(2) Stochastic Scheduling  
Keyword(3) Data-Driven Exploration  
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1st Author's Name Shunta Nonaga  
1st Author's Affiliation Hokkaido University (Hokkaido Univ.)
2nd Author's Name Koji Tabata  
2nd Author's Affiliation Hokkaido University (Hokkaido Univ.)
3rd Author's Name Junya Honda  
3rd Author's Affiliation Kyoto University (Kyoto Univ.)
4th Author's Name Hiroyuki Kudo  
4th Author's Affiliation University of Tsukuba (University of Tsukuba)
5th Author's Name Wataru Yashiro  
5th Author's Affiliation Tohoku University (Tohoku Univ.)
6th Author's Name Tamiki Komatsuzaki  
6th Author's Affiliation Hokkaido University (Hokkaido Univ.)
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Speaker Author-1 
Date Time 2026-07-03 15:35:00 
Presentation Time 25 minutes 
Registration for IBISML 
Paper # NC2026-15, IBISML2026-15 
Volume (vol) vol.126 
Number (no) no.90(NC), no.91(IBISML) 
Page pp.69-76 
#Pages 8 
Date of Issue 2026-06-25 (NC, IBISML) 

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