Results 41 to 50 of about 536,964 (293)

Signal-to-Noise Ratio Model and Imaging Performance Analysis of Photonic Integrated Interferometric System for Remote Sensing

Remote Sensing
Photonic integrated interferometric imaging systems (PIISs) provide a compact solution for high-resolution Earth observation missions with stringent size, weight, and power (SWaP) constraints.
Chuang Zhang, Yan He, Qinghua Yu
doaj   +1 more source

A Noise Reduction Method for Photoacoustic Imaging In Vivo Based on EMD and Conditional Mutual Information

IEEE Photonics Journal, 2019
Photoacoustic tomography is a technique to reconstruct the image of light energy absorption distribution in tissues based on the detected photoacoustic signals. In recent years, this research field has been greatly developed, and its application range is
Meng Zhou, Haibo Xia, Hongtao Zhong, Jiayao Zhang, Fei Gao   +4 more
doaj   +1 more source

Theoretical investigation of the quantum noise in ghost imaging

, 2004
Ghost imaging is a method to nonlocally image an object by transmitting pairs of entangled photons through the object and a reference optical system respectively. We present a theoretical analysis of the quantum noise in this imaging technique.
Cheng, Jing, Han, Shensheng
core   +1 more source

A Novel Application of Non-Destructive Readout Technology to Localisation Microscopy. [PDF]

, 2017
The fitting precision in localisation microscopy is highly dependent on the signal to noise ratio. To increase the quality of the image it is therefore important to increase the signal to noise ratio of the measurements.
Barnett, S.F., Cadby, A.J., Hunter, C.N., Juárez, M.A., Snape, M.   +4 more
core   +1 more source

Experimental Quantum Imaging exploiting multi-mode spatial correlation of twin beams

, 2010
Properties of quantum states have disclosed new and revolutionary technologies, ranging from quantum information to quantum imaging. This last field is addressed to overcome limits of classical imaging by exploiting specific properties of quantum states ...
Alice Meda, Giorgio Brida, I. Ruo-Berchera, Ivano Ruo Berchera, L. Mandel, Marco Genovese   +5 more
core   +1 more source

A Dual-Transducer Approach for High-Resolution and High-Precision Shear Wave Elasticity Imaging

Sensors
Shear wave elasticity imaging, an ultrasound-based method for imaging tissue elasticity, has been widely accepted in both preclinical studies and clinical practices for diagnosing various diseases.
Jingfei Liu, Stanislav Y. Emelianov
doaj   +1 more source

Size-optimized 32-channel brain arrays for 3 T pediatric imaging [PDF]

, 2011
Size-optimized 32-channel receive array coils were developed for five age groups, neonates, 6 months old, 1 year old, 4 years old, and 7 years old, and evaluated for pediatric brain imaging.
Almli, de Zwart, Evans, Griswold, Hayes, Kellman, Kumar, Nellhaus, O'Shaughnessy, Poldrack, Pruessmann, Reykowski, Roche, Roemer, Schmitt, Vanderby, Vasanawala, Waber, Wald, Wiggins, Wiggins, Yerys   +21 more
core   +2 more sources

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

FEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Advanced Denoising for X-ray Ptychography [PDF]

, 2019
The success of ptychographic imaging experiments strongly depends on achieving high signal-to-noise ratio. This is particularly important in nanoscale imaging experiments when diffraction signals are very weak and the experiments are accompanied by ...
Chang, Huibin, Enders, Bjoern, Enfedaque, Pablo, Marchesini, Stefano, Reinhardt, Juliane, Schroer, Christian G., Shapiro, David, Yu, Young-Sang, Zeng, Tieyong, Zhang, Jie   +9 more
core   +4 more sources

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

FEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho, Shin Morioka, Junko Sasaki, Takehiko Sasaki   +3 more
wiley   +1 more source