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Ruyi Zha (查如一) I am a 4th year PhD student at the Australian National University (ANU), advised by Prof. Hongdong Li. Previously, I obtained Bachelor of Engineering (First Class Honours) from ANU in 2020. My primary research interest lies in 3D computer vision, with a focus on 3D reconstruction, neural rendering, and medical imaging. Linkedin  /  Google Scholar  /  Github News [Jul. 2025] Finished Applied Scientist Intern at Amazon. [Jul. 2025] Our paper X2-Gaussian got accepted to ICCV 2025. [Feb. 2025] Our paper 4DRGS got accepted to IPMI 2025 (Oral). [Jan. 2025] Started as Applied Scientist Intern at Amazon. [Sep. 2024] Our paper R2-Gaussian got accepted to NeurIPS 2024 (Poster). [Jul. 2023] Our paper EnsoSurf got accepted to MICCAI 2023 (Oral). [Sep. 2022] Our paper NAF got accepted to MICCAI 2022 (Oral). Selected Publications X2-Gaussian: 4D Radiative Gaussian Splatting for Continuous-time Tomographic Reconstruction Weihao Yu, Yuanhao Cai, Ruyi Zha, Zhiwen Fan, Chenxin Li, Yixuan Yuan ICCV 2025 [Arxiv][Code] [Project] A 4D Gaussian Splatting method for dynamic CT reconstruction 4DRGS: 4D Radiative Gaussian Splatting for Efficient 3D Vessel Reconstruction from Sparse-View Dynamic DSA Images Zhentao Liu*, Ruyi Zha*, Huangxuan Zhao, Hongdong Li, Zhiming Cui IPMI 2025 (Oral) [Arxiv][Code] [Project] The first 3DGS framework for DSA vessel reconstruction R2-Gaussian: Rectifying Radiative Gaussian Splatting for Tomographic Reconstruction Ruyi Zha, Tao Jun Lin, Yuanhao Cai, Jiwen Cao, Yanhao Zhang, Hongdong Li NeurIPS 2024 (Poster) [Arxiv] [Code] [Project] The first 3DGS framework for fast CT reconstruction EndoSurf: Neural Surface Reconstruction of Deformable Tissues with Stereo Endoscope Videos Ruyi Zha*, Xuelian Cheng*, Hongdong Li, Mehrtash Harandi, Zongyuan Ge MICCAI 2023 (Oral, Top 3%) [Arxiv] [Code] A NeRF framework for endoscope reconstruction NAF: Neural Attenuation Fields for Sparse-View CBCT Reconstruction Ruyi Zha, Yanhao Zhang, Hongdong Li MICCAI 2022 (Oral, Top 3%) [Arxiv] [Code] A NeRF framework for fast CT reconstruction Website template from Jon Barron