3 papers
cs.CV2026
ProSAC-CT: Progressive Spectral-Anatomical Co-Guided Multi-Stage Diffusion Model for Low-Dose CT Denoising
Xuepeng Liu, Zetong Liu, Renyiming Li +5
Low-dose computed tomography (LDCT) reduces radiation exposure but introduces stronger quantum noise, streak artifacts, and local texture degradation, which can obscure anatomical…
cs.CV2026
AnF-DiffPET: Anatomy- and Frequency-Guided Diffusion for PET/CT Denoising
Xuepeng Liu, Ruili Li, Zetong Liu +5
Positron emission tomography (PET) provides essential functional information for disease assessment, however reducing injected activity or acquisition time produces low-dose (LD) P…
cs.CV2023
Deep Metric Learning Assisted by Intra-variance in A Semi-supervised View of Learning
Liu Pingping, Liu Zetong, Lang Yijun +2
Deep metric learning aims to construct an embedding space where samples of the same class are close to each other, while samples of different classes are far away from each other.…