Results 51 to 60 of about 239,453 (286)

Computerized electrocardiogram data transformation enables effective algorithmic differentiation of wide QRS complex tachycardias

Annals of Noninvasive Electrocardiology, Volume 28, Issue 1, January 2023., 2023
Accurate automatic wide QRS complex tachycardia (WCT) differentiation may be accomplished through the use of novel parameters derived from computerized data of the (i) WCT electrocardiogram (ECG) alone and (ii) paired WCT and baseline ECGs. Once automated WCT differentiation models are integrated into commercially available computerized ECG ...
Anthony H. Kashou, Sarah LoCoco, Preet A. Shaikh, Bhavesh B. Katbamna, Ojasav Sehrawat, Daniel H. Cooper, Sandeep S. Sodhi, Phillip S. Cuculich, Marye J. Gleva, Elena Deych, Ruiwen Zhou, Lei Liu, Abhishek J. Deshmukh, Samuel J. Asirvatham, Peter A. Noseworthy, Christopher V. DeSimone, Adam M. May   +16 more
wiley   +1 more source

Focal-plane wavefront sensing with high-order adaptive optics systems

, 2014
We investigate methods to calibrate the non-common path aberrations at an adaptive optics system having a wavefront-correcting device working at an extremely high resolution (larger than 150x150).
Doelman, Niek, Keller, Christoph U., Kenworthy, Matthew, Korkiakoski, Visa, Otten, Gilles, Verhaegen, Michel   +5 more
core   +4 more sources

The Infrared Imaging Spectrograph (IRIS) for TMT: Instrument Overview [PDF]

, 2014
We present an overview of the design of IRIS, an infrared (0.84 - 2.4 micron) integral field spectrograph and imaging camera for the Thirty Meter Telescope (TMT). With extremely low wavefront error (
Aliado, Ted, Bauman, Brian, Brims, George, Canfield, John, Chen, Shaojie, Dekany, Richard, Delacroix, Alex, Do, Tuan, Dunn, Jennifer, Ellerbroek, Brent, Herriot, Glen, Ikenoue, Bungo, Johnson, Chris, Larkin, James E., Meyer, Elliot, Moore, Anna M., Obuchi, Yoshiyuki, Pazder, John, Phillips, Andrew C., Reshetov, Vladimir, Riddle, Reed, Saito, Sakae, Simard, Luc, Smith, Roger, Sohn, Ji Man, Suzuki, Ryuji, Uraguchi, Fumihiro, Usuda, Tomonori, Wang, Eric, Wang, Lianqi, Weiss, Jason, Wooff, Robert, Wright, Shelley A., Zhang, Kai   +33 more
core   +1 more source

Ophthalmic imaging in diabetic retinopathy: A review

Clinical &Experimental Ophthalmology, Volume 50, Issue 9, Page 1082-1096, December 2022., 2022
Abstract Retinal imaging has been a key tool in the diagnosis, evaluation, management and documentation of diabetic retinopathy (DR) and diabetic macular oedema (DMO) for many decades. Imaging technologies have rapidly evolved over the last few decades, yielding images with higher resolution and contrast with less time, effort and invasiveness.
Onnisa Nanegrungsunk, Direk Patikulsila, Srinivas R. Sadda   +2 more
wiley   +1 more source

Experimental Research on the Correction of Vortex Light Wavefront Distortion

Photonics
Wavefront distortion occurs when vortex beams are transmitted in the atmosphere. The turbulence effect greatly affects the transmission of information, so it is necessary to use adaptive optical correction technology to correct the wavefront distortion ...
Yahang Ge, Xizheng Ke
doaj   +1 more source

Performance Comparison of Wavefront-Sensorless Adaptive Optics Systems by Using of the Focal Plane

International Journal of Optics, 2015
The correction capability and the convergence speed of the wavefront-sensorless adaptive optics (AO) system are compared based on two different system control algorithms, which both use the information of focal plane.
Huizhen Yang, Zhen Zhang, Jian Wu
doaj   +1 more source

Study on Aberration Correction of Adaptive Optics Based on Convolutional Neural Network

Photonics, 2021
The existence of aberrations has always been an important limiting factor in the imaging field. Especially in optical microscopy imaging, the accumulated aberration of the optical system and the biological samples distorts the wavefront on the focal ...
Jin Li, Luwei Wang, Yong Guo, Yangrui Huang, Zhigang Yang, Wei Yan, Junle Qu   +6 more
doaj   +1 more source

Tempestas ex machina: A review of machine learning methods for wavefront control [PDF]

arXiv, 2023
As we look to the next generation of adaptive optics systems, now is the time to develop and explore the technologies that will allow us to image rocky Earth-like planets; wavefront control algorithms are not only a crucial component of these systems, but can benefit our adaptive optics systems without requiring increased detector speed and sensitivity
arxiv  

Improved wavefront correction for coherent image restoration

Optics Express, 2017
Coherent imaging has a wide range of applications in, for example, microscopy, astronomy, and radar imaging. Particularly interesting is the field of microscopy, where the optical quality of the lens is the main limiting factor. In this article, novel algorithms for the restoration of blurred images in a system with known optical aberrations are ...
Claudius Zelenka, Reinhard Koch
openaire   +3 more sources

The coronagraphic Modal Wavefront Sensor: a hybrid focal-plane sensor for the high-contrast imaging of circumstellar environments [PDF]

, 2016
The raw coronagraphic performance of current high-contrast imaging instruments is limited by the presence of a quasi-static speckle (QSS) background, resulting from instrumental non-common path errors (NCPEs).
Keller, Christoph U., Korkiakoski, Visa, Pietrow, Alexander G. M., Snik, Frans, Wilby, Michael J.   +4 more
core   +3 more sources