Results 71 to 80 of about 574,951 (322)

Regularization Methods for Phase Retrieval and Phase Contrast Tomography

Abstract and Applied Analysis, 2015
Phase contrast tomography is a high sensitivity medical imaging technique. Several regularization methods have been used in the literature to obtain stable solutions for the phase retrieval or the phase contrast tomography problems.
Bruno Sixou
doaj   +1 more source

Autofocusing Algorithm for Pixel-Super-Resolved Lensfree On-Chip Microscopy

Frontiers in Physics, 2021
In recent years, lensfree on-chip microscopy has developed into a promising and powerful computational optical microscopy technique that allows for wide-field, high-throughput microscopic imaging without using any lenses.
Yumin Wu, Yumin Wu, Yumin Wu, Yumin Wu, Linpeng Lu, Linpeng Lu, Linpeng Lu, Linpeng Lu, Jialin Zhang, Jialin Zhang, Jialin Zhang, Jialin Zhang, Zhuoshi Li, Zhuoshi Li, Zhuoshi Li, Zhuoshi Li, Chao Zuo, Chao Zuo, Chao Zuo, Chao Zuo   +19 more
doaj   +1 more source

Phase Retrieval via Randomized Kaczmarz: Theoretical Guarantees

, 2017
We consider the problem of phase retrieval, i.e. that of solving systems of quadratic equations. A simple variant of the randomized Kaczmarz method was recently proposed for phase retrieval, and it was shown numerically to have a computational edge over ...
Tan, Yan Shuo, Vershynin, Roman
core   +1 more source

Inhibition of CDK9 enhances AML cell death induced by combined venetoclax and azacitidine

Molecular Oncology, EarlyView.
The CDK9 inhibitor AZD4573 downregulates c‐MYC and MCL‐1 to induce death of cytarabine (AraC)‐resistant AML cells. This enhances VEN + AZA‐induced cell death significantly more than any combination of two of the three drugs in AraC‐resistant AML cells.
Shuangshuang Wu, Jianlei Zhao, Aaban Asfar Azmi, Avanti Gupte, Jenna Thibodeau, Shuang Liu, Jinli Yang, Guan Wang, Holly Edwards, Lisa A. Polin, Juiwanna Kushner, Sijana H. Dzinic, Kathryn White, Julie Boerner, Maik Hüttemann, Jay Yang, Yue Wang, Jeffrey W. Taub, Yubin Ge   +18 more
wiley   +1 more source

Multi frame holograms batched optimization for binary phase spatial light modulators

Scientific Reports
Phase retrieval methods used in computer generated holograms such as Gerchberg-Saxton and gradient descent give results which are prone to noise and other defects.
Jinze Sha, Antoni Wojcik, Benjamin Wetherfield, Jianghan Yu, Timothy D. Wilkinson   +4 more
doaj   +1 more source

Higher Order Transport of Intensity Equation Methods: Comparisons and Their Hybrid Application for Noise Adaptive Phase Imaging

IEEE Photonics Journal, 2019
As a non-interferometric method, the transport of intensity equation (TIE) method suits for quantitative phase imaging with the commercial microscope platform, especially those higher order TIE approaches which can realize precise phase retrieval by ...
Junbao Hu, Qi Wei, Yan Kong, Zhilong Jiang, Liang Xue, Fei Liu, Dug Young Kim, Cheng Liu, Shouyu Wang   +8 more
doaj   +1 more source

Complete phase retrieval of photoelectron wavepackets

New Journal of Physics, 2020
Coherent, broadband pulses of extreme ultraviolet light provide a new and exciting tool for exploring attosecond electron dynamics. Using photoelectron streaking, interferometric spectrograms can be generated that contain a wealth of information about ...
L Pedrelli, P D Keathley, L Cattaneo, F X Kärtner, U Keller   +4 more
doaj   +1 more source

Fast Phase Retrieval from Local Correlation Measurements

, 2016
We develop a fast phase retrieval method which can utilize a large class of local phaseless correlation-based measurements in order to recover a given signal ${\bf x} \in \mathbb{C}^d$ (up to an unknown global phase) in near-linear $\mathcal{O} \left( d \
Iwen, Mark, Viswanathan, Aditya, Wang, Yang   +2 more
core   +2 more sources

A synthetic benzoxazine dimer derivative targets c‐Myc to inhibit colorectal cancer progression

Molecular Oncology, EarlyView.
Benzoxazine dimer derivatives bind to the bHLH‐LZ region of c‐Myc, disrupting c‐Myc/MAX complexes, which are evaluated from SAR analysis. This increases ubiquitination and reduces cellular c‐Myc. Impairing DNA repair mechanisms is shown through proteomic analysis.
Nicharat Sriratanasak, Bodee Nutho, Worawat Wattanathana, Narumon Phaonakrop, Bunnatut Panasawatwong, Katharina Erlenbach‐Wuensch, Sittiruk Roytrakul, Regine Schneider‐Stock, Pithi Chanvorachote   +8 more
wiley   +1 more source

Low-Bit-Depth Detection for Phase Retrieval with Higher Efficiency in Holographic Data Storage

Photonics
In the past, comprehensive information was imperative for image processing, prompting a preference for high-depth cameras. However, in our research, we discovered that the abundance of image details may impede phase retrieval.
Hongjie Liu, Shujun Zheng, Yongkun Lin, Haiyang Song, Xianmiao Xu, Xiong Li, Jihong Zheng, Qiang Cao, Xiao Lin, Xiaodi Tan   +9 more
doaj   +1 more source