Catheter-mounted dual-frequency ultrasound transducers for intravascular contrast-enhanced superharmonic imaging

2019 ◽  
Vol 146 (4) ◽  
pp. 3031-3031
Author(s):  
Jinwook Kim ◽  
Sandeep Kasoji ◽  
Eric Markley ◽  
xiaoning jiang ◽  
Paul Dayton
Keyword(s):  
Ultrasound Transducers ◽  
Dual Frequency ◽  
Contrast Enhanced ◽  
Frequency Ultrasound

Dual-Frequency Ultrasound Transducers for the Detection of Morphological Changes of Deep-Layered Muscles

2018 ◽  
Vol 18 (4) ◽  
pp. 1373-1383 ◽  
Author(s):  
Xueli Sun ◽  
Xingchen Yang ◽  
Xiangyang Zhu ◽  
Honghai Liu
Keyword(s):  
Morphological Changes ◽  
Ultrasound Transducers ◽  
Dual Frequency ◽  
Frequency Ultrasound

scholarly journals Acoustic Angiography: A New Imaging Modality for Assessing Microvasculature Architecture

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Ryan C. Gessner ◽  
C. Brandon Frederick ◽  
F. Stuart Foster ◽  
Paul A. Dayton
Keyword(s):  
High Resolution ◽  
Imaging Modality ◽  
Dual Frequency ◽  
Contrast Imaging ◽  
3D Images ◽  
Tissue Integration ◽  
Contrast Enhanced ◽  
Imaging Approach ◽  
Microvascular Architecture ◽  
Frequency Ultrasound

The purpose of this paper is to provide the biomedical imaging community with details of a new high resolution contrast imaging approach referred to as “acoustic angiography.” Through the use of dual-frequency ultrasound transducer technology, images acquired with this approach possess both high resolution and a high contrast-to-tissue ratio, which enables the visualization of microvascular architecture without significant contribution from background tissues. Additionally, volumetric vessel-tissue integration can be visualized by using b-mode overlays acquired with the same probe. We present a brief technical overview of how the images are acquired, followed by several examples of images of both healthy and diseased tissue volumes. 3D images from alternate modalities often used in preclinical imaging, contrast-enhanced micro-CT and photoacoustics, are also included to provide a perspective on how acoustic angiography has qualitatively similar capabilities to these other techniques. These preliminary images provide visually compelling evidence to suggest that acoustic angiography may serve as a powerful new tool in preclinical and future clinical imaging.

Treatment of Murine Tumors Using Dual-Frequency Ultrasound in an Experimental in Vivo Model

2009 ◽  
Vol 35 (5) ◽  
pp. 756-763 ◽  
Author(s):  
Amir H. Barati ◽  
Manijhe Mokhtari-Dizaji ◽  
Hossein Mozdarani ◽  
S. Zahra Bathaie ◽  
Zuhair M. Hassan
Keyword(s):  
In Vivo Model ◽  
Dual Frequency ◽  
Murine Tumors ◽  
Frequency Ultrasound

scholarly journals The Efficacy and Safety of Dual-Frequency Ultrasound for Improving Skin Hydration and Erythema in Patients with Rosacea and Acne

2021 ◽  
Vol 10 (4) ◽  
pp. 834
Author(s):  
Young Jae Kim ◽  
Ik Jun Moon ◽  
Hae Woong Lee ◽  
Chong Hyun Won ◽  
Sung Eun Chang ◽  
...  
Keyword(s):  
Skin Diseases ◽  
Skin Barrier ◽  
Skin Hydration ◽  
Efficacy And Safety ◽  
Dual Frequency ◽  
Barrier Dysfunction ◽  
Inflammatory Skin Diseases ◽  
Facial Erythema ◽  
Frequency Ultrasound

Inflammatory skin diseases, such as rosacea and acne, are major causes of facial erythema and accompanying skin barrier dysfunction. Several methods to restore the impaired skin barrier and improve facial erythema, such as medication, radiofrequency, laser, and ultrasound therapy were attempted. This study evaluated the efficacy and safety of dual-frequency ultrasound with impulse mode, for improving skin hydration and erythema in Asian subjects with rosacea and acne. Twenty-six subjects with facial erythema received an ultrasound treatment once per week, for 4 weeks, over both cheeks. The erythema index and transepidermal water loss (TEWL) were measured at each visit. Clinicians assessed the erythema improvement and patients evaluated their satisfaction level. The average decrease in TEWL and erythema index at 6 weeks was 5.37 ± 13.22 g·h−1·m−2 (p = 0.020) and 39.73 ± 44.21 (p = 0.010), respectively. The clinician’s erythema assessment and the subject satisfaction questionnaire score significantly improved at final follow-up (p < 0.001; p = 0.003, respectively). No serious adverse effects were observed during the treatment and follow-up periods. The dual-frequency ultrasound with impulse mode appears to be effective and safe for improving skin hydration and erythema in patients with rosacea and acne.

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