Results 41 to 50 of about 6,648 (171)

Effects of apodization smoothing and denoising on spectral fitting

, 2020
Visual review of individual spectra in magnetic resonance spectroscopic imaging (MRSI) data benefits from the application of spectral smoothing; however, if this processing step is applied prior to spectral analysis this can impact the accuracy of the ...
Goryawala, Mohammed, Maudsley, Andrew A, Sullivan, Molly   +2 more
core   +1 more source

First order surface grating fiber coupler under the period chirp and apodization functions variations effects [PDF]

, 2022
The paper has demonstrated the first order surface grating fiber coupler under the period chirp and apodization functions variations effects. The Fiber coupler transmittivity/reflectivity, the fiber coupler grating index change and the fiber coupler mesh
Sunil Lavadiya2 ,, Alsharef Mohammad1 ,, Mahmoud M. A. Eid1 ,, Vishal Sorathiya2 ,, Ahmed Nabih Zaki Rashed5, Alzaidi, Mohammed S., Mohammad, Alsharef, Mohammed S. Alzaidi1 ,, Patel, Shobhit K., Lavadiya, Sunil, Shobhit K. Patel3,4 ,, Eid, Mahmoud M. A., Rashed, Ahmed Nabih Zaki, Sorathiya, Vishal   +13 more
core   +1 more source

Focusing of light beams by the phase apodization pupil [PDF]

Компьютерная оптика, 2018
We investigated reduction of the size of the illuminated beam in the focal region produced by the optical systems of NA = 0.99 has been. The intensity distributions of polarized light field in the focal volume for the phase apodization pupil have been ...
Andra Naresh Kumar Reddy, Manuel Martinez-Corral, Svetlana Khonina, Sergei Karpeev   +3 more
doaj   +1 more source

An IEEE single-precision arithmetic based beamformer architecture for phased array ultrasound imaging system

Engineering Science and Technology, an International Journal, 2021
Ultrasound imaging is a largely used medical imaging system as it is safe, non-invasive, and capable of real-time imaging. In ultrasound imaging, different beamforming methods are used to obtain the image of the field of view.
Mayur Agarwal, Abhishek Tomar, Navneet Kumar   +2 more
doaj   +1 more source

Geometry‐Driven Whispering‐Gallery Modes in Self‐Assembled Phosphorescent Organic Microtubes

Advanced Optical Materials, EarlyView.
Micelles encapsulating tris(2‐phenylpyridine)iridium(III) self‐assemble into a hollow hexagonal microtube stabilized by a surface passivation layer. The hexagonal cross‐section confines circulating light along its facets, sustaining sharp whispering‐gallery resonances that guide photoluminescence emission under laser excitation.
Do Wan Kim, Seokho Kim, Jinho Choi, Sang‐hun Lee, Seongwan Bae, Jongho Kim, Sangjun Lee, Junseok Heo, Sangin Kim, Kyusang Lee, Dong Hyuk Park   +10 more
wiley   +1 more source

Generation of optical signals carrying OAM based on vortex fiber-optic periodic structures

Физика волновых процессов и радиотехнические системы, 2020
In this article, author considers the process of generation of fiber modes carrying orbital angular momentum (vortex modes) using chiral fiber Bragg gratings; in this context, the formation of vortex modes is carried out by converting thefundamental mode
Azat R. Gizatulin
doaj   +1 more source

Chlorine‐Functionalized Silane‐Modified Copper Electrocatalyst for Enhanced CO2 Reduction to Multi‐Carbon Products

Advanced Science, EarlyView.
A chlorine‐functionalized silane modifier (CPTMS) is introduced to cooperatively regulate CO2 reduction to C2+ products on Cu‐based catalysts. Dual‐functional interface sequentially enhances CO2 activation, intermediates protonation and C─C coupling, delivering a 5‐fold increase in C2+ faradaic efficiency (FE, 75% vs.
Ying Ying Ch'ng, Sankhadip Saha, Ming Zhang, Shujie Zhou, Lixue Jiang, Putri Ramadhany, Jitraporn Vongsvivut, Adrian Cernescu, Priyank Vijaya Kumar, Yihao Shan, Zhipeng Ma, Xiaoxuan Luo, Rahman Daiyan, Zhaojun Han, Rose Amal   +14 more
wiley   +1 more source

Multi-Focal Diffractive Lens by Apodized Phase Photon Sieves

Gazi Üniversitesi Fen Bilimleri Dergisi
As a result of the invention of photon sieves and the implementation of apodization to these sieves, significant design freedom has been achieved in diffractive optical elements (DOEs).
Ahmet Ünal
doaj   +1 more source

Multimodal Imaging of Hypoxia, Metabolism and pH in Feline Sarcoma Using Hyperpolarized 13C MRI and PET

Advanced Science, EarlyView.
This work presents a clinically deployable simultaneous PET/MRI workflow which integrates hyperpolarized 13C imaging of metabolism and extracellular pH with [18F]FMISO PET to characterize hypoxia, acidosis, and metabolic reprogramming in feline sarcoma.
Martin Grashei, Tanja Groll, Stephanie Kahl, Silke Baer, Elisabeth Bliemsrieder, Frits H. A. van Heijster, Andre Wendlinger, Pascal Wodtke, Jorge Cabello, Susan Notohamiprodjo, Christian Lohrmann, Markus Schwaiger, Wolfgang A. Weber, Katja Steiger, Andrea Meyer‐Lindenberg, Johannes Hirschberger, Christine Baumgartner, Franz Schilling   +17 more
wiley   +1 more source

Real‐Time Multicolor Fluorescence Microscopy via Cross‐Channel Acquisition and Deep‐Learning‐Based Inference

Advanced Intelligent Discovery, EarlyView.
Sequential multicolor fluorescence imaging in dynamic microsystems is constrained by acquisition speed and excitation dose. This study introduces a real‐time framework to reconstruct spectrally separated channels from reduced cross‐channel acquisitions (frames containing mixed spectral contributions).
Juan J. Huaroto, Yuxin Jin, Nicholas Roy, Sarthak Misra   +3 more
wiley   +1 more source