575 citations · 929 across the 52 of their papers we have counts for
3 papers · 1 filter
Simultaneous activity and attenuation estimation in TOF-PET with TV-constrained nonconvex optimization
Zhimei Ren, Emil Y. Sidky, Rina Foygel Barber +2
An alternating direction method of multipliers (ADMM) framework is developed for nonsmooth biconvex optimization for inverse problems in imaging. In particular, the simultaneous es…
Estimating the spectrum in computed tomography via Kullback-Leibler divergence constrained optimization
Wooseok Ha, Emil Y. Sidky, Rina Foygel Barber +2
We study the problem of spectrum estimation from transmission data of a known phantom. The goal is to reconstruct an x-ray spectrum that can accurately model the x-ray transmission…
Three material decomposition for spectral computed tomography enabled by block-diagonal step-preconditioning
Emil Y. Sidky, Rina Foygel Barber, Taly Gilat-Schmidt +1
A potential application for spectral computed tomography (CT) with multi-energy-window photon-counting detectors is quantitative medical imaging with K-edge contrast agents. Image…