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   Articles with "ring array" as a keyword



High-efficiency solar laser pumping by a modified ring-array concentrator

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recommendations! Published in 2018 at "Optics Communications"

DOI: 10.1016/j.optcom.2018.03.027

Abstract: Abstract To considerably improve solar laser efficiency, a 5.5 mm diameter 20 mm length Nd:YAG single-crystal rod can be efficiently pumped by highly concentrated solar radiation through a modified ring-array concentrator. Composed of several coaxial… read more here.

Keywords: array concentrator; solar laser; ring array; concentrator ... See more keywords

NO2 Sensor Based on Faraday Rotation Spectroscopy Using Ring Array Permanent Magnets.

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recommendations! Published in 2023 at "Analytical chemistry"

DOI: 10.1021/acs.analchem.2c04821

Abstract: Faraday rotation spectroscopy (FRS) exploits the magneto-optical effect to achieve highly selective and sensitive detection of paramagnetic molecules. Usually, a solenoid coil is used to provide a longitudinal magnetic field to produce the magneto-optical effect.… read more here.

Keywords: faraday rotation; spectroscopy; ring array; magnetic field ... See more keywords
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Stable white photoluminescence from Mn-contained organic lead bromide perovskite ring arrays formed from 2D colloidal crystal templates

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recommendations! Published in 2020 at "New Journal of Chemistry"

DOI: 10.1039/d0nj02381g

Abstract: Metal halide perovskites have proven to be reliable white light-emitting materials from a single component. Ordered metal halide perovskite arrays have drawn much attention because of their applications in lasing and displays. However, perovskite arrays… read more here.

Keywords: perovskite ring; colloidal crystal; stable white; ring array ... See more keywords

Time-domain reconstruction of the speed of sound in ring-array ultrasound computed tomography with randomized super-shots

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recommendations! Published in 2025 at "Applied Physics Letters"

DOI: 10.1063/5.0296596

Abstract: Ring-array ultrasound computed tomography has recently achieved sufficient maturity for clinical applications like breast imaging. Image reconstruction is achieved with state of the art iterative algorithms, full-waveform inversion in the frequency domain. Equivalent iterative techniques… read more here.

Keywords: reconstruction; ring array; time domain; array ultrasound ... See more keywords

Generating and monitoring mild hyperthermia using a ring array ultrasound transducer

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recommendations! Published in 2024 at "International Journal of Hyperthermia"

DOI: 10.1080/02656736.2024.2376681

Abstract: Abstract Objective To demonstrate the feasibility of using a ring array ultrasound (US) transducer, guided by ultrasound tomography (UST), for generating and monitoring mild hyperthermia (MHTh). Methods In silico and in vitro experiments were designed… read more here.

Keywords: using ring; array transducer; hyperthermia; ring array ... See more keywords

Perfect acoustic-vortexes constructed by the Fourier transform of quasi-Bessel beams based on the simplified ring-array of sectorial planar transducers.

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recommendations! Published in 2023 at "IEEE transactions on ultrasonics, ferroelectrics, and frequency control"

DOI: 10.1109/tuffc.2023.3277854

Abstract: Benefiting from the independence of the vortex-radius on the topological charge (TC), the perfect acoustic-vortex (PAV) with an angular phase gradient exhibits important perspectives in acoustic applications. However, the practical implementation is still restricted by… read more here.

Keywords: transform quasi; perfect acoustic; fourier transform; ring array ... See more keywords

A Comparison of Image Reconstruction Methods for Ring-Array Photoacoustic Computed Tomography

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recommendations! Published in 2025 at "IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control"

DOI: 10.1109/tuffc.2025.3600372

Abstract: This work compares the effectiveness of four image reconstruction techniques for a ring-array photoacoustic computed tomography (PACT) system: the delay-and-sum (DAS), the interpolated model matrix inversion (IMMI), the frequency-domain model-based (FDMB), and the time-reversal (TR)… read more here.

Keywords: time; image; reconstruction; array photoacoustic ... See more keywords

Concentric-ring arrays for forward-viewing ultrasound imaging

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recommendations! Published in 2022 at "Journal of Medical Imaging"

DOI: 10.1117/1.jmi.9.6.065002

Abstract: Abstract. Purpose Current ultrasound (US)-image-guided needle insertions often require an expertized technique for clinicians because the performance of tasks in a three-dimensional space using two-dimensional images requires operators to cognitively maintain the spatial relationships between… read more here.

Keywords: ring array; array configuration; transducer elements; forward viewing ... See more keywords

One- and two-dimensional ring array formed by birefringence in tandem with conical refraction: theoretical analysis.

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recommendations! Published in 2025 at "Optics express"

DOI: 10.1364/oe.550561

Abstract: This study proposes a method to create a ring array using birefringence (BR) and conical refraction (CR), where a circularly polarized beam is first divided into 2m sub-beams in m BR crystals and then transformed… read more here.

Keywords: birefringence; conical refraction; ring array; array ... See more keywords

Dual-Wavelength Photoacoustic Computed Tomography with Piezoelectric Ring-Array Transducer for Imaging of Indocyanine Green Liposomes Aggregation in Tumors

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recommendations! Published in 2022 at "Micromachines"

DOI: 10.3390/mi13060946

Abstract: Recently, indocyanine green (ICG), as an FDA-approved dye, has been widely used for phototherapy. It is essential to obtain information on the migration and aggregation of ICG in deep tissues. However, existing fluorescence imaging platforms… read more here.

Keywords: aggregation; indocyanine green; piezoelectric ring; ring array ... See more keywords

Research on the Multi-Element Synthetic Aperture Focusing Technique in Breast Ultrasound Imaging, Based on the Ring Array

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recommendations! Published in 2022 at "Micromachines"

DOI: 10.3390/mi13101753

Abstract: As a widely clinical detection method, ultrasonography (US) has been applied to the diagnosis of breast cancer. In this paper, the multi-element synthetic aperture focusing (M-SAF) is applied to the ring array of breast ultrasonography… read more here.

Keywords: synthetic aperture; aperture; breast; aperture focusing ... See more keywords