Results 21 to 30 of about 71,330 (257)

Overview of Ultrasound Detection Technologies for Photoacoustic Imaging

Micromachines, 2020
Ultrasound detection is one of the major components of photoacoustic imaging systems. Advancement in ultrasound transducer technology has a significant impact on the translation of photoacoustic imaging to the clinic.
Rayyan Manwar, Karl Kratkiewicz, Kamran Avanaki   +2 more
doaj   +1 more source

Thermal Ablation and High-Resolution Imaging Using a Back-to-Back (BTB) Dual-Mode Ultrasonic Transducer: In Vivo Results

Sensors, 2021
We present a back-to-back (BTB) structured, dual-mode ultrasonic device that incorporates a single-element 5.3 MHz transducer for high-intensity focused ultrasound (HIFU) treatment and a single-element 20.0 MHz transducer for high-resolution ultrasound ...
Hae Gyun Lim, Hyunhee Kim, Kyungmin Kim, Jeongwoo Park, Yeonggeun Kim, Jinhee Yoo, Dasom Heo, Jinhwan Baik, Sung-Min Park, Hyung Ham Kim   +9 more
doaj   +1 more source

The Influence of Air Pressure on the Dynamics of Flexural Ultrasonic Transducers

Sensors, 2019
The flexural ultrasonic transducer comprises a piezoelectric ceramic disc bonded to a membrane. The vibrations of the piezoelectric ceramic disc induce flexural modes in the membrane, producing ultrasound waves. The transducer is principally utilized for
Andrew Feeney, Lei Kang, William E. Somerset, Steve Dixon   +3 more
doaj   +1 more source

Design and Fabrication of Double-Focused Ultrasound Transducers to Achieve Tight Focusing

Sensors, 2016
Beauty treatment for skin requires a high-intensity focused ultrasound (HIFU) transducer to generate coagulative necrosis in a small focal volume (e.g., 1 mm3) placed at a shallow depth (3–4.5 mm from the skin surface).
Jihun Jang, Jin Ho Chang
doaj   +1 more source

Ultrasound Hypotension Protocol Time-motion Study Using the Multifrequency Single Transducer Versus a Multiple Transducer Ultrasound Device

Western Journal of Emergency Medicine, 2021
Introduction: Ultrasound hypotension protocols (UHP) involve imaging multiple body areas, each with different transducers and imaging presets. The time for task switching between presets and transducers to perform an UHP has not been previously studied ...
Linda Sabbadini, Rocco Germano, Emily Hopkins, Jason S. Haukoos, John L. Kendall   +4 more
doaj   +1 more source

A 3D-printed passive ultrasound phase-interference compensator for reduced wave degradation in cancellous bone – an experimental study in replica models

Journal of Tissue Engineering, 2018
The current ‘active’ solution to overcome the impediment of ultrasound wave degradation associated with transit-time variation in complex tissue structures, such as the skull, is to vary the transmission delay of ultrasound pulses from individual ...
Christian M Langton, Saeed M AlQahtani, Marie-Luise Wille   +2 more
doaj   +1 more source

Circulating microRNA signatures of cachexia and cancer in Canis familiaris as a comparative oncology model for human disease

Molecular Oncology, EarlyView.
Circulating microRNAs as biomarkers of cachexia and sex‐specific cancer in senior dogs. In 25 client‐owned dogs, four circulating miRNAs (miR‐15a, miR‐15b, miR‐16, miR‐140) were downregulated in cachexia, with miR‐16 the strongest individual biomarker (AUC = 0.899).
Soon‐Seok Park, Kyongman An, Gyeonghwa Kim, Soo‐Nyun Choi, Hong‐Ki Lee, Keun Hur, Kyu‐Shik Jeong   +6 more
wiley   +1 more source

Integration of porous graphene and 3D-printed piezopolymer for flexible ultrasound transducers

Materials & Design
Ultrasound technology is crucial in diagnostic imaging, making it widely used in medical applications. However, traditional ultrasound transducers face limitations in flexibility and ease of fabrication, leading to the exploration of thin-film and ...
Shirin Movaghgharnezhad, Ehsan Ansari, Clayton A. Baker, Ahmed A Bashatah, Dulcce A. Valenzuela, Pilgyu Kang, Parag V. Chitnis   +6 more
doaj   +1 more source

Localizing a target inside an enclosed cylinder with a single chaotic cavity transducer augmented with supervised machine learning

AIP Advances, 2021
Ultrasound is employed in, e.g., non-destructive testing and environmental sensing. Unfortunately, conventional single-element ultrasound probes have a limited acoustic aperture.
Tom Sillanpää, Krista Longi, Joni Mäkinen, Timo Rauhala, Arto Klami, Ari Salmi, Edward Hæggström   +6 more
doaj   +1 more source

Somatostatin receptor 4 (SSTR4) is a tumor suppressor in cutaneous and head & neck squamous cell carcinomas

Molecular Oncology, EarlyView.
This study identifies somatostatin receptor 4 (Sstr4) as a critical tumor suppressor against skin and head/neck cancers (HNSCC, cSCC, and BCC). The loss of Sstr4 removes a check on cell growth, causing hyperactivation of the MAPK‐ERK signaling pathway (↑).
Ali Taqvi, Tuan Khang Huynh, Adway Kadam, Zahra Kardan, Yue Yan, Amina Jamal Laham, Sampath Kumar Loganathan   +6 more
wiley   +1 more source