A5004064690- Photoacoustic and Ultrasonic Imaging
- Thermography and Photoacoustic Techniques
- Ultrasound and Hyperthermia Applications
- Optical Imaging and Spectroscopy Techniques
- Underwater Acoustics Research
- Ultrasonics and Acoustic Wave Propagation
- Ultrasound Imaging and Elastography
- Electrostatics and Colloid Interactions
- Nanoplatforms for cancer theranostics
Pohang University of Science and Technology
2024
Pukyong National University
1998
Abstract Transparent ultrasound transducers (TUTs) can seamlessly integrate optical and components, but acoustic impedance mismatch prohibits existing TUTs from being practical substitutes for conventional opaque transducers. Here, we propose a transparent adhesive based on silicon dioxide-epoxy composite to fabricate matching backing layers with impedances of 7.5 4–6 MRayl, respectively. By employing these layers, develop an ultrasensitive, broadband TUT 63% bandwidth at single resonance...
Dual-mode photoacoustic/ultrasound endoscopy (ePAUS) is a promising tool for preclinical and clinical interventions. To be clinically useful, ePAUS must deliver high-performance ultrasound imaging comparable to commercial systems maintain high photoacoustic performance at long working distances. This requires transducer with an intact physical aperture coaxial alignment of acoustic optical beams within the probe, challenging integration task. We present probe miniaturized, optically...
In this study, a novel approach is presented to overcome the challenge of replacing conventional opaque ultrasound transducers (OUTs) with transparent (TUTs) that seamlessly integrate optical and components. TUTs offer design combines modalities, providing convenient solution challenges such as beam combiner or off-axis problems. However, their performance has been significantly limited due acoustic impedance mismatch. To address mismatch problem, composite-based matching backing layers are...
NIR-II window (1000–1700 nm) photoacoustic contrast agents offer deep tissue imaging potential. We examined whole-body perfusion kinematics monitoring in by dispersing the commercial dye IR-1048 using a transparent ultrasound transducer.
We develop materials for acoustic impedance matching of transparent ultrasound transducers (TUTs). Now, the performance TUT is equivalent to that opaque transducers, and photoacoustic tomography using surpasses existing technologies.
The forward propagation of two-dimensional ultrasonic fields through layered fluid media was investigated theoretically by the angular spectrum method combined with Rayleigh–Sommerfeld diffraction theory and experimentally measurement using a precise scanning system needle-point hydrophone. Two types transmitting transducers, one which is plane other concave type same frequency aperture, were used. In theoretical analysis incidence on boundary layer calculated those transmission throughout...