Rui Liu,Lin Fu,Bruno De Man et al.
Rui Liu et al.
Projection and backprojection operations are essential in a variety of image reconstruction and physical correction algorithms in CT. The distance-driven (DD) projection and backprojection are widely used for their highly sequential memory ...
Joint Reconstruction of Absorbed Optical Energy Density and Sound Speed Distributions in Photoacoustic Computed Tomography: A Numerical Investigation [0.03%]
基于数值模拟的光声层析成像中同时重建吸收光能密度和声速分布的研究
Chao Huang,Kun Wang,Robert W Schoonover et al.
Chao Huang et al.
Photoacoustic computed tomography (PACT) is a rapidly emerging bioimaging modality that seeks to reconstruct an estimate of the absorbed optical energy density within an object. Conventional PACT image reconstruction methods assume a consta...
Yi Zhang,Yan Xi,Qingsong Yang et al.
Yi Zhang et al.
Photon-counting detectors can acquire x-ray intensity data in different energy bins. The signal to noise ratio of resultant raw data in each energy bin is generally low due to the narrow bin width and quantum noise. To address this problem,...
Sampurna Biswas,Soura Dasgupta,Raghuraman Mudumbai et al.
Sampurna Biswas et al.
We consider the recovery of a matrix X, which is simultaneously low rank and joint sparse, from few measurements of its columns using a two-step algorithm. Each column of X is measured using a combination of two measurement matrices; one wh...
Efficient, Convergent SENSE MRI Reconstruction for Nonperiodic Boundary Conditions via Tridiagonal Solvers [0.03%]
基于三对角线求解器的非周期性边界条件有效收敛的SENSE MRI重建方法
Mai Le,Jeffrey A Fessler
Mai Le
Undersampling is an effective method for reducing scan acquisition time for MRI. Strategies for accelerated MRI such as parallel MRI and Compressed Sensing MRI present challenging image reconstruction problems with non-differentiable cost f...
Gabi Pragier,Ido Greenberg,Xiuyuan Cheng et al.
Gabi Pragier et al.
One of the primary challenges in single particle reconstruction with cryo-electron microscopy is to find a three-dimensional model of a molecule using its noisy two-dimensional projection-images. As the imaging orientations of the projectio...
Zhizhen Zhao,Yoel Shkolnisky,Amit Singer
Zhizhen Zhao
Cryo-electron microscopy nowadays often requires the analysis of hundreds of thousands of 2-D images as large as a few hundred pixels in each direction. Here, we introduce an algorithm that efficiently and accurately performs principal comp...
Alternating dual updates algorithm for X-ray CT reconstruction on the GPU [0.03%]
基于GPU的CT重建中交替的双变量更新算法
Madison G McGaffin,Jeffrey A Fessler
Madison G McGaffin
Model-based image reconstruction (MBIR) for X-ray computed tomography (CT) offers improved image quality and potential low-dose operation, but has yet to reach ubiquity in the clinic. MBIR methods form an image by solving a large statistica...
Daniel S Weller,Ayelet Pnueli,Gilad Divon et al.
Daniel S Weller et al.
This paper proposes a general framework for reconstructing sparse images from undersampled (squared)-magnitude data corrupted with outliers and noise. This phase retrieval method uses a layered approach, combining repeated minimization of a...
Comparison of SIRT and SQS for Regularized Weighted Least Squares Image Reconstruction [0.03%]
用于加权最小二乘图像重建的SIRT和SQS方法比较
Jens Gregor,Jeffrey A Fessler
Jens Gregor
Tomographic image reconstruction is often formulated as a regularized weighted least squares (RWLS) problem optimized by iterative algorithms that are either inherently algebraic or derived from a statistical point of view. This paper compa...