scholarly journals High frequency ultrasound assesses transient changes in cartilage under osmotic loading

2020 ◽  
Vol 17 (5) ◽  
pp. 5190-5211
Author(s):  
Jana Zatloukalova ◽  
◽  
Kay Raum ◽  
◽  
Keyword(s):  
High Frequency ◽  
High Frequency Ultrasound ◽  
Osmotic Loading ◽  
Frequency Ultrasound

Extraction of Mechanical Properties of Articular Cartilage From Osmotic Swelling Behavior Monitored Using High Frequency Ultrasound

2006 ◽  
Vol 129 (3) ◽  
pp. 413-422 ◽  
Author(s):  
Q. Wang ◽  
Y. P. Zheng ◽  
H. J. Niu ◽  
A. F. T. Mak
Keyword(s):  
Mechanical Properties ◽  
Articular Cartilage ◽  
High Frequency ◽  
Weight Bearing ◽  
Ultrasound Measurement ◽  
High Frequency Ultrasound ◽  
Water Fraction ◽  
Layer Interface ◽  
Osmotic Loading ◽  
Frequency Ultrasound

Articular cartilage is a biological weight-bearing tissue covering the bony ends of articulating joints. Negatively charged proteoglycan (PG) in articular cartilage is one of the main factors that govern its compressive mechanical behavior and swelling phenomenon. PG is nonuniformly distributed throughout the depth direction, and its amount or distribution may change in the degenerated articular cartilage such as osteoarthritis. In this paper, we used a 50MHz ultrasound system to study the depth-dependent strain of articular cartilage under the osmotic loading induced by the decrease of the bathing saline concentration. The swelling-induced strains under the osmotic loading were used to determine the layered material properties of articular cartilage based on a triphasic model of the free-swelling. Fourteen cylindrical cartilage-bone samples prepared from fresh normal bovine patellae were tested in situ in this study. A layered triphasic model was proposed to describe the depth distribution of the swelling strain for the cartilage and to determine its aggregate modulus Ha at two different layers, within which Ha was assumed to be linearly dependent on the depth. The results showed that Ha was 3.0±3.2, 7.0±7.4, 24.5±11.1MPa at the cartilage surface, layer interface, and deep region, respectively. They are significantly different (p<0.01). The layer interface located at 70%±20% of the overall thickness from the uncalcified-calcified cartilage interface. Parametric analysis demonstrated that the depth-dependent distribution of the water fraction had a significant effect on the modeling results but not the fixed charge density. This study showed that high-frequency ultrasound measurement together with triphasic modeling is practical for quantifying the layered mechanical properties of articular cartilage nondestructively and has the potential for providing useful information for the detection of the early signs of osteoarthritis.

Arterial Thrombus Dissolution In Vivo Using a Transducer-Tipped, High-Frequency Ultrasound Catheter and Local Low-Dose Urokinase Delivery

2001 ◽  
Vol 8 (3) ◽  
pp. 282-290 ◽  
Author(s):  
Shaul Atar ◽  
Huai Luo ◽  
Tomoo Nagai ◽  
Roger A. Sahm ◽  
Michael C. Fishbein ◽  
...  
Keyword(s):  
High Frequency ◽  
Low Dose ◽  
High Frequency Ultrasound ◽  
Arterial Thrombus ◽  
Frequency Ultrasound

scholarly journals Effectiveness of high frequency ultrasound on pressure ulcer

Medicine ◽  
2019 ◽  
Vol 98 (37) ◽  
pp. e17111 ◽  
Author(s):  
Xiang-qin Gao ◽  
Xiao-mei Xue ◽  
Jian-kang Zhang ◽  
Fei Yan ◽  
Qiu-xia Mu
Keyword(s):  
Pressure Ulcer ◽  
High Frequency ◽  
High Frequency Ultrasound ◽  
Frequency Ultrasound

scholarly journals Corneal Biomechanics Assessment Using High Frequency Ultrasound B-Mode Imaging

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Hassan M. Ahmed ◽  
Walid Al-Atabany ◽  
Nancy M. Salem
Keyword(s):  
High Frequency ◽  
Corneal Biomechanics ◽  
High Frequency Ultrasound ◽  
Frequency Ultrasound

Evaluation of frontal fibrosing alopecia with ultra‐high‐frequency ultrasound

2021 ◽  
Author(s):  
Carolina Ávila de Almeida ◽  
Simone Guarçoni ◽  
Bruna Duque Estrada ◽  
Maria Carolina Zafra Páez ◽  
Clarissa Canella
Keyword(s):  
High Frequency ◽  
High Frequency Ultrasound ◽  
Ultra High Frequency ◽  
Frequency Ultrasound

scholarly journals Morphologic Features of Cutaneous T-Cell Lymphomas Using Dermoscopy and High Frequency Ultrasound

2020 ◽  
Vol 10 (1) ◽  
pp. 17
Author(s):  
Iris Wohlmuth-Wieser ◽  
Joel M. Ramjist ◽  
Neil Shear ◽  
Raed Alhusayen
Keyword(s):  
T Cell ◽  
High Frequency ◽  
Early Stage ◽  
Skin Lesions ◽  
Diagnostic Tools ◽  
Skin Thickness ◽  
High Frequency Ultrasound ◽  
T Cell Lymphomas ◽  
Standardized Parameters ◽  
Frequency Ultrasound

The diagnosis of cutaneous T-cell lymphomas (CTCL) is frequently delayed by a median of three years and requires the clinical evaluation of an experienced dermatologist and a confirmatory skin biopsy. Dermoscopy and high-frequency ultrasound (HFUS) represent two non-invasive diagnostic tools. While dermoscopy is inexpensive and widely used for the diagnosis of melanoma and non-melanoma skin cancers, HFUS of skin lymphomas represents a novel diagnostic approach that is not yet implemented in the routine dermatologic practice. The aim of our study was to prospectively assess skin lesions of patients with either CTCL patches or plaques with dermoscopy and HFUS and to compare the findings with atopic dermatitis (AD) and psoriasis. Thirteen patients with an established diagnosis of CTCL, psoriasis, or AD were studied: Dermoscopy features including spermatozoa-like structures and the presence of white scales could assist in differentiating between early-stage CTCL and AD. HFUS measurements of the skin thickness indicated increased epidermal-, thickness in CTCL, and psoriasis compared with AD. Our results support the use of dermoscopy as a useful tool to diagnose CTCL. HFUS could augment the dermatologic assessment, but further studies will be needed to define standardized parameters.

Utility of high‐frequency ultrasound in assessing cutaneous edema in venous ulcer patients

2021 ◽  
Author(s):  
Shakthi Pragasam ◽  
Rashmi Kumari ◽  
Malathi Munisamy ◽  
Devinder Mohan Thappa
Keyword(s):  
High Frequency ◽  
Venous Ulcer ◽  
High Frequency Ultrasound ◽  
Frequency Ultrasound
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