Dual frequency ultrasound measurement of bone ‐ a technique for elimination of soft tissue effects on pulse‐echo measurements

2008 ◽  
Vol 123 (5) ◽  
pp. 3631-3631
Author(s):  
Ossi Riekkinen ◽  
Mikko Hakulinen ◽  
Juha Töyräs ◽  
Jukka Jurvelin
Keyword(s):  
Soft Tissue ◽  
Ultrasound Measurement ◽  
Dual Frequency ◽  
Tissue Effects ◽  
Pulse Echo ◽  
Frequency Ultrasound

Performance of dual-frequency ultrasound measurement based on DBR fiber laser hydrophone

2017 ◽  
Vol 266 ◽  
pp. 101-110
Author(s):  
Chengang Lyu ◽  
Shuai Zhang ◽  
Gan Fang ◽  
Jin Jie ◽  
Xugeng Zhang ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Ultrasound Measurement ◽  
Dual Frequency ◽  
Frequency Ultrasound

Dual frequency ultrasound‐ A pulse‐echo technique for analysis of layered material

2008 ◽  
Vol 123 (5) ◽  
pp. 3697-3697
Author(s):  
Ossi Riekkinen ◽  
Mikko Hakulinen ◽  
Juha Töyräs ◽  
Jukka Jurvelin
Keyword(s):  
Layered Material ◽  
Dual Frequency ◽  
Pulse Echo ◽  
Frequency Ultrasound

Dual-frequency ultrasound technique minimizes errors induced by soft tissue in ultrasound bone densitometry

2008 ◽  
Vol 49 (9) ◽  
pp. 1038-1041 ◽  
Author(s):  
J. Karjalainen ◽  
J. Töyräs ◽  
T. Rikkonen ◽  
J.S. Jurvelin ◽  
O. Riekkinen
Keyword(s):  
Soft Tissue ◽  
Tissue Composition ◽  
Dual Frequency ◽  
Ultrasound Technique ◽  
Bone Ultrasound ◽  
Soft Tissue Composition ◽  
Transmission Measurements ◽  
Frequency Ultrasound

Background: Most bone ultrasound devices are designed for through-transmission measurements of the calcaneus. In principle, ultrasound backscattering measurements are possible at more typical fracture sites of the central skeleton. Unfortunately, soft tissue overlying the bones diminishes reliability of these measurements. Purpose: To apply the single-transducer dual-frequency ultrasound (DFUS) technique to eliminate the errors induced by soft tissue on the measurements of integrated reflection coefficient (IRC) in human distal femur in vivo. Material and Methods: Ultrasound and dual-energy X-ray absorptiometry (DXA) examinations were conducted on a bodybuilder during a 21-week training and dieting period. Results: Significant changes in quantity and composition of soft tissue took place during the diet. However, DXA measurements showed no significant effects on bone density measurements. The single transducer DFUS technique enabled the determination of local soft-tissue composition, as verified by comparison with the DXA ( r=0.91, n=8, p<0.01). Further, the technique eliminated the soft-tissue-induced error from IRC measured for the bone. The uncorrected IRC associated significantly with the change in local soft-tissue composition ( r=−0.83, n=8, p<0.05), whereas the corrected IRC values showed no significant dependence ( r=−0.30, n=8, p=0.46) on local soft-tissue composition. Conclusion: The DFUS technique may significantly enhance the accuracy of clinical ultrasound measurements of bone.

Dual-Frequency Ultrasound—New Pulse–Echo Technique for Bone Densitometry

2008 ◽  
Vol 34 (10) ◽  
pp. 1703-1708 ◽  
Author(s):  
O. Riekkinen ◽  
M.A. Hakulinen ◽  
J. Töyräs ◽  
J.S. Jurvelin
Keyword(s):  
Bone Densitometry ◽  
Dual Frequency ◽  
Pulse Echo ◽  
Frequency Ultrasound

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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