Joint Reconstruction of the Activity and the Attenuation in PET by Diffusion Posterior Sampling: a Feasibility Study

Autor:	Phung-Ngoc, Clémentine, Bousse, Alexandre, De Paepe, Antoine, Dang, Hong-Phuong, Saut, Olivier, Visvikis, Dimitris
Rok vydání:	2024
Předmět:	Physics - Medical Physics
Druh dokumentu:	Working Paper
Popis:	This study introduces a novel framework for joint reconstruction of the activity and attenuation (JRAA) in positron emission tomography (PET) using diffusion posterior sampling (DPS), which leverages diffusion models (DMs) to address activity-attenuation dependencies and mitigate crosstalk issues in non-time-of-flight (TOF) settings; experimental evaluations with 2-dimensional (2-D) XCAT phantom data show that DPS outperforms traditional maximum likelihood activity and attenuation (MLAA) methods, providing consistent, high-quality reconstructions even without TOF information. Comment: 5 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2412.11776 Zobrazit plný text záznamu View this record from Arxiv