Ultrasound-Mediated Ocular Drug Delivery: From Physics and Instrumentation to Future Directions

B Duncan, R Al-Kassas, G Zhang, D Hughes, Y Qiu - Micromachines, 2023 - mdpi.com
Drug delivery to the anterior and posterior segments of the eye is impeded by anatomical
and physiological barriers. Increasingly, the bioeffects produced by ultrasound are being …

Optically transparent focused transducers for combined photoacoustic and ultrasound microscopy

S Park, S Kang, JH Chang - Journal of Medical and Biological …, 2020 - Springer
Purpose Photoacoustic (PA) microscopy has emerged as a useful tool in biomedical
imaging applications such as visualization of microvasculature and hemoglobin oxygen …

Reverberant optical coherence elastography using multifocal acoustic radiation force

T Mekonnen, AW Schill, C Zevallos-Delgado… - Optics Letters, 2023 - opg.optica.org
In this study, we introduce a multifocal acoustic radiation force source that combines an
ultrasound transducer and a 3D-printed acoustic lens for application in reverberant optical …

Electrical impedance matching networks based on filter structures for high frequency ultrasound transducers

JY Moon, J Lee, JH Chang - Sensors and Actuators A: Physical, 2016 - Elsevier
An electrical impedance matching (EIM) network is proposed to achieve the broad
bandwidth of a high frequency ultrasound transducer and to improve the signal-to-noise …

A 35 MHz/105 MHz dual-element focused transducer for intravascular ultrasound tissue imaging using the third harmonic

J Lee, JY Moon, JH Chang - Sensors, 2018 - mdpi.com
The superharmonic imaging of tissue has the potential for high spatial and contrast
resolutions, compared to the fundamental and second harmonic imaging. For this technique …

A transparent ultrasound array for real-time optical, ultrasound, and photoacoustic imaging

H Chen, S Agrawal, M Osman, J Minotto, S Mirg… - BME …, 2022 - spj.science.org
Objective and Impact Statement. Simultaneous imaging of ultrasound and optical contrasts
can help map structural, functional, and molecular biomarkers inside living subjects with …

Wideband multimode excitation by a double-parabolic-reflector ultrasonic transducer

K Chen, T Irie, T Iijima, T Morita - IEEE transactions on …, 2020 - ieeexplore.ieee.org
This research presents double-parabolic-reflector wave-guided ultrasonic transducers in
order to realize wideband (0-2.5 MHz), multiharmonic mode excitations (over 20 modes) …

Increased light penetration due to ultrasound-induced air bubbles in optical scattering media

H Kim, JH Chang - Scientific reports, 2017 - nature.com
Light is an attractive tool for high spatial-and contrast-resolution imaging, highly sensitive
molecular imaging, and target-selective therapy, and it does not exhibit the risks associated …

Endoscopic probe for ultrasound-assisted photodynamic therapy of deep-lying tissue

J Kim, H Kim, JH Chang - Ieee Access, 2020 - ieeexplore.ieee.org
Endoscopic photodynamic therapy (PDT) has attracted much attention as a minimally
invasive, minimally toxic treatment. PDT can selectively destroy cancer cells by reactive …

[HTML][HTML] Nonreciprocity of backward volume spin wave beams excited by the curved focusing transducer

M Madami, Y Khivintsev, G Gubbiotti, G Dudko… - Applied Physics …, 2018 - pubs.aip.org
The focusing effect for spin waves excited by a curved micrometer-sized coplanar
waveguide transducer on top of a 5-μm-thick epitaxial yttrium iron garnet film is studied by …