AccScience Publishing / IJB / Online First / DOI: 10.36922/ijb.5102
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REVIEW

Projection algorithm and its optimizations for computed axial lithography: A review

Jian-Su Sun1,2 ,  Di Wang3 ,  Xue Zhang1,2 ,  Haiyue Jiang3* ,  Maobin Xie4* ,  Jia-Qi Lü1,2*
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1 Center for Advanced Laser Technology, Hebei University of Technology, Tianjin, China
2 Hebei Key Laboratory of Advanced Laser Technology and Equipment, Hebei University of Technology, Tianjin, China
3 Plastic Surgery Hospital of Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
4 The Fourth Affiliated Hospital of Guangzhou Medical University, School of Biomedical Engineering, Guangzhou Medical University, Guangzhou, Guangdong, China
IJB, 5102 https://doi.org/10.36922/ijb.5102
Submitted: 9 October 2024 | Accepted: 15 November 2024 | Published: 19 November 2024
© 2024 by the Author(s). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution 4.0 International License ( https://creativecommons.org/licenses/by/4.0/ )
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Abstract

Volumetric additive manufacturing (AM) is a novel AM method that offers advantages such as fast printing speed and isotropic mechanical properties. As an important branch of volumetric AM, computed axial lithography (CAL) based on azimuthal projections and rotational printing has attracted great attention and has been widely used in recent years. Here, we focus on the projection algorithms of CAL, which is critical to the printing quality, including its fidelity and accuracy. Different optimization methods, including iterative optimization of projection space and objective model, optimization for the optical influences of materials, and optimizations with hardware upgrades, are summarized. The features and advantages of different projection optimization algorithms are also analyzed and discussed, which could promote the application and development of volumetric AM.

Graphical abstract
Keywords
Computed axial lithography
Radon transform
3D bioprinting
Volumetric additive manufacturing
Funding
This work was supported by the National Natural Science Foundation of China (82371796; 82402936).
Conflict of interest
The authors declare no conflict of interest.
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International Journal of Bioprinting, Electronic ISSN: 2424-8002 Print ISSN: 2424-7723, Published by AccScience Publishing
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