文献类型： 会议论文
第一作者： M. Savanier
作者： M. Savanier 1 ; V. Gautier 2 ; N. J. Pinton 3 ; C. Comtat 1 ; F. Sureau 1 ;
作者机构： 1.BioMaps, Université Paris-Saclay, CEA, CNRS, Inserm, SHFJ, Orsay, France
2.CREATIS, INSA Lyon, Université Claude Bernard Lyon 1, CNRS, Inserm, Univ Lyon, Lyon, France
3.LaTIM, INSERM, Université de Bretagne Occidentale, Brest, France
关键词： Microwave integrated circuits;Semiconductor detectors;Magnetic resonance imaging;Resonance;Convex functions;Positron emission tomography;Image reconstruction
会议名称：
主办单位：
页码： 1-1
摘要： Dual modality Positron Emission Tomography (PET)/Magnetic Resonance Imaging (MRI) systems provide seamless hardware-based image coregistration, making MRI-guided PET reconstruction a natural approach. In this work, we investigate the adaptability of the plug-and-play (PnP) paradigm for MRI-guided PET reconstruction. Inspired by proximal optimization algorithms and fixed point theory, the PnP approach proposes to replace the proximity operator of the regularization with a more general denoiser. Precisely, we integrate a deep denoiser - a DRUnet - into the Alternating Direction Method of Multipliers (ADMM) algorithm such that convergence of the iterates to a controlled set of fixed points is ensured. Results on simulated [18F]-FDG PET scans demonstrate that multibranch architectures are more compatible with the PnP framework than multichannel architectures and that the PnP fixed-point solutions have high likelihood and a lower mean squared error than the reconstruction obtained with a classical MRI-guided Bowsher regularization and without MRI guidance.
分类号： r312
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Deep Equilibrium for Hyperparameter Estimation in Dynamic PET Reconstruction
作者：A. Chazottes;É. Chouzenoux;J.-C. Pesquet;F. Sureau
关键词：Protocols;Semiconductor detectors;Noise;Oncology;Parametric statistics;Positron emission tomography;Radiotracer
