Acoustic microscopy
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Ultrasound Localization Microscopy and Super-Resolution: A State of the Art Open
Because it drives the compromise between resolution and penetration, the diffraction limit has long represented an unreachable summit to conquer in ultrasound imaging. Within a few years after the introduction of optical localization micro…
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Acoustic wave sparsely activated localization microscopy (AWSALM): Super-resolution ultrasound imaging using acoustic activation and deactivation of nanodroplets Open
Photo-activated localization microscopy (PALM) has revolutionized the field of fluorescence microscopy by breaking the diffraction limit in spatial resolution. In this study, “acoustic wave sparsely activated localization microscopy (AWSAL…
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Advanced ultrasonic NDT for weak bond detection in composite-adhesive bonded structures Open
Weak bond detection in composite-adhesive joints is a highly challenging task in the non-destructive testing (NDT) community. This paper aims to evaluate the bonding quality in composite-adhesive bonded structures with high-frequency high-…
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Performance Characterization of a Switchable Acoustic Resolution and Optical Resolution Photoacoustic Microscopy System Open
Photoacoustic microscopy (PAM) is a scalable bioimaging modality; one can choose low acoustic resolution with deep penetration depth or high optical resolution with shallow imaging depth. High spatial resolution and deep penetration depth …
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Convolutional neural network for resolution enhancement and noise reduction in acoustic resolution photoacoustic microscopy Open
In acoustic resolution photoacoustic microscopy (AR-PAM), a high numerical aperture focused ultrasound transducer (UST) is used for deep tissue high resolution photoacoustic imaging. There is a significant degradation of lateral resolution…
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Scanning Acoustic Microscopy (SAM): A Robust Method for Defect Detection during the Manufacturing Process of Ultrasound Probes for Medical Imaging Open
The main aim of this paper is to provide the feasibility of non-destructive testing (NDT) method, such as scanning acoustic microscopy (SAM), for damage detection in ultrasound (US) probes for medical imaging during the manufacturing proce…
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All-optical optoacoustic microscopy based on probe beam deflection technique Open
Optoacoustic (OA) microscopy using an all-optical system based on the probe beam deflection technique (PBDT) for detection of laser-induced acoustic signals was investigated as an alternative to conventional piezoelectric transducers. PBDT…
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A Novel Quantitative 500-MHz Acoustic Microscopy System for Ophthalmologic Tissues Open
This novel SAM was shown to be capable of measuring mechanical properties of soft biological tissues at microscopic resolution; it is currently the only system that allows simultaneous measurement of K, ρ, and attenuation in large lateral …
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Optical-Resolution Photoacoustic Microscopy Using Transparent Ultrasound Transducer Open
The opacity of conventional ultrasound transducers can impede the miniaturization and workflow of current photoacoustic systems. In particular, optical-resolution photoacoustic microscopy (OR-PAM) requires the coaxial alignment of optical …
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Skull acoustic aberration correction in photoacoustic microscopy using a vector space similarity model: a proof-of-concept simulation study Open
Skull bone represents a highly acoustical impedance mismatch and a dispersive barrier for the propagation of acoustic waves. Skull distorts the amplitude and phase information of the received waves at different frequencies in a transcrania…
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Spatially resolving lithium-ion battery aging by open-hardware scanning acoustic imaging Open
The internal mechanical condition of a lithium-ion battery is often disregarded but delivers essential information about the battery performance and lifetime. This work presents a method to measure the internal mechanical condition of lith…
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Optically Transparent Focused Transducers for Combined Photoacoustic and Ultrasound Microscopy Open
Purpose Photoacoustic (PA) microscopy has emerged as a useful tool in biomedical imaging applications such as visualization of microvasculature and hemoglobin oxygen saturation, single-cell, and label-free imaging of organs including cance…
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Acoustic subsurface-atomic force microscopy: Three-dimensional imaging at the nanoscale Open
The development of acoustic subsurface atomic force microscopy, which promises three-dimensional imaging with single-digit nanometer resolution by the introduction of ultrasound actuations to a conventional atomic force microscope, has com…
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Physical and mechanical characterization of irradiated uranium dioxide with a broad burnup range and different dopants using acoustic microscopy Open
Scanning acoustic microscopy is a non-destructive technique that allows determining the local material elastic properties by measuring the velocity of acoustic waves propagating in matter. High frequency acoustic waves are generated by a p…
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Structured ultrasound microscopy Open
We present a form of acoustic microscopy, called Structured Ultrasound Microscopy (SUM). It creates a volumetric image by recording reflected echoes of ultrasound waves with a structured phase front using a moving single-element transducer…
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The cluster architecture of carbon in polymer nanocomposites observed by impulse acoustic microscopy Open
The high‐resolution ultrasonic technique (impulse acoustic microscopy) was applied for observing the bulk microstructure of nanocomposites with various types of carbon nanoparticles as filler. It was shown that ultrasonic methods are excel…
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Study on Damage Evaluation and Machinability of UD-CFRP for the Orthogonal Cutting Operation Using Scanning Acoustic Microscopy and the Finite Element Method Open
Owing to high specific strength and designability, unidirectional carbon fiber reinforced polymer (UD-CFRP) has been utilized in numerous fields to replace conventional metal materials. Post machining processes are always required for UD-C…
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Acoustic Emission of Deformation Twinning in Magnesium Open
The Acoustic Emission of deformation twinning in Magnesium is investigated in this article. Single crystal testing with combined full field deformation measurements, as well as polycrystalline testing inside the scanning electron microscop…
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The dance of the nanobubbles: detecting acoustic backscatter from sub-micron bubbles using ultra-high frequency acoustic microscopy Open
Detection of the motion of individual nanobubbles and microbubbles in an agarose gel using an ultra-high frequency acoustic microscope.
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Combination of virtual point detector concept and fluence compensation in acoustic resolution photoacoustic microscopy Open
We propose a hybrid approach to image enhancement in acoustic resolution photoacoustic microscopy. The developed technique is based on compensation for nonuniform spatial sensitivity of the optoacoustic (OA) system in both optical and acou…
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Omnidirectional microscopy by ultrasonic sample control Open
Omnidirectional microscopy (OM) is an emerging technology capable of enhancing the three-dimensional (3D) microscopy widely applied in life sciences. In OM, the precise position and orientation control of the sample are required. However, …
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Simulation and Experimental Verification of Edge Blurring Phenomenon in Microdefect Inspection Based on High-Frequency Ultrasound Open
Acoustic micro-imaging based on high-frequency ultrasound has been widely and effectively used for microdefect detection in microelectronic packages. With the miniaturization of microelectronic devices and the reduction of defects, edge bl…
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Investigation and Analysis of Acoustojets by Spectral Element Method Open
In this study, acoustic wave scattering in a homogeneous media by an obstacle is examined in the case of plane wave excitation and the formation of acoustic jets is explored. Spectral element method (SEM) is employed for the approximate so…
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Passive ultrasound aided acoustic resolution photoacoustic microscopy imaging for layered heterogeneous media Open
Photoacoustic imaging reconstructions usually assume a known speed-of-sound (SOS) distribution; however, in most cases, the SOS distribution is not revealed and is difficult to estimate from photoacoustic signals. In this paper, we propose…
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Preparation and characterization of EVA/ZnO composites as piezoelectric elements for ultrasonic transducers Open
Films of EVA/ZnO composites prepared to be piezoelectric active elements for ultrasonic transducers. These films are prepared by solvent casting technique. Different ZnO percentages were used (1, 2, 3 and 4%). The EVA/ZnO composites were c…
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Material Properties of Human Ocular Tissue at 7-µm Resolution Open
Quantitative assessment of the material properties of ocular tissues can provide valuable information for investigating several ophthalmic diseases. Quantitative acoustic microscopy (QAM) offers a means of obtaining such information, but f…
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Real-time imaging of acoustic waves in bulk materials with X-ray microscopy Open
The dynamics of lattice vibrations govern many material processes, such as acoustic wave propagation, displacive phase transitions, and ballistic thermal transport. The maximum velocity of these processes and their effects is determined by…
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High-Frequency Time-Resolved Scanning Acoustic Microscopy for Biomedical Applications Open
High-frequency focused ultrasound has emerged as a powerful modality for both biomedical imaging and elastography. It is gaining more attention due to its capability to outperform many other imaging modalities at a submicron resolution. Be…
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Acoustic Force Elastography Microscopy Open
AFEM is a promising technique to quantify elastic properties of scaffolds for tissue engineering and will be applied to provide new insights for exploring elastic changes of cell-laden scaffolds for tissue engineering and material science.
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Subwavelength far-field ultrasound drug-delivery Open
The theoretical diffraction-limit of resolution for ultrasound imaging has recently been bypassed in-vitro and in-vivo. However, in the context of ultrasound therapy, the precision of therapeutic beams remains bound to the half-wavelength …