Development and evaluation of a high-frequency ultrasound-based system for in vivo strain imaging of the skin

Vogt, Michael; Ermert, H.

doi:10.1109/tuffc.2005.1417260

Cited by 72 publications

(39 citation statements)

References 36 publications

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“…This is not specific to psoriasis, because in normal skin the dermis typically exhibits higher stiffness compared to the hypodermis [40]. The insignificant variation of SR values following treatment may allow to hypothesize on the absence of dermal atrophy in this group of patients, which would be in accordance with the expected course of events with low-potency steroid use for short periods of time [5].…”

Section: Discussionmentioning

confidence: 89%

Conventional ultrasonography and sonoelastography in the assessment of plaque psoriasis under topical corticosteroid treatment – work in progress

et al. 2014

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Aims: The objective of the study was to compare the efficiency of 20 MHz skin ultrasonography and 40 MHz conventional ultrasonography in the assessment of plaque psoriasis and to assess the efficiency of 40 MHz real-time sonoelastography in the early detection of steroid-induced skin atrophy in psoriatic plaques. Patients and methods: Ultrasonographic blinded evaluation was performed on 16 plaques in three consecutive patients, at baseline and after hydrocortisone acetate 1% ointment six-week application. The parameters were epidermal and dermal thicknesses for gray-scale ultrasonography and strain ratio for sonoelastography. Strain ratio was computed between the dermis and the adjacent hypodermis. Student's t-test for paired samples was performed. A confidence level of p<.05 was considered significant. Results: At follow-up, epidermal thickness was significantly reduced with 20 MHz (p = .002) and 40 MHz sonography (p = .032), while dermal thickness varied insignifcantly with 20 MHz (p = .35) and 40 MHz sonography (p = .33). Measurements at 40 MHz were significantly higher than their 20 MHz counterparts at baseline (epidermis: p < .001; dermis: p = .003) and at follow-up (epidermis: p < .001; dermis: p = .001). Strain ratio revealed no significant change of dermal elasticity (p = .96). Conclusions: Although epidermal and dermal measurements varied significantly with 20 MHz and 40 MHz ultrasonography, both techniques efficiently quantified treatment response by measuring the reduction of epidermal thickness. Sonoelastographic findings were consistent with the expected outcome of short-term use of low-potency corticosteroid. Further studies are recommended.

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Section: Discussionmentioning

confidence: 89%

Conventional ultrasonography and sonoelastography in the assessment of plaque psoriasis under topical corticosteroid treatment – work in progress

et al. 2014

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“…In some cases elastograms are better than conventional diagnostic B-mode ultrasound images [6], diagnosis of atherosclerosis [7], detection and grading of deep vein thrombosis [8], imaging of skin pathologies [9] and evaluation of myocardial stiffness [10]. Elastography methods are categorized according to different criteria such as excitation source, and/or being quantitative, or qualitative methods.…”

Section: Introductionmentioning

confidence: 99%

A New Shear Wave Speed Estimation Method for Shear Wave Elasticity Imaging

Hassan¹,

Salem²,

Eladawy³

2015

IJCA

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In this paper, a novel method to estimate the shear wave speed is proposed. This method is a modified version of the lateral Time to Peak (TTP) method that estimates the induced shear wave speed. Lateral TTP algorithm finds the instance at which the maximum displacement is detected at each lateral location under examination at a certain depth. In the proposed algorithm each temporal displacement data is enhanced by fitting a Gaussian distribution into it prior to finding instance at which the peak displacement detected. This algorithm is validated on tracked displacements generated from a finiteelement model (FEM) that simulates the dynamic response of tissues to acoustic radiation forces. The proposed algorithm reveals a reconstruction of materials having shear modulus of 1.33 kPa as 1.28±0.05 kPa, 2.835 kPa as 2.84±0.23 kPa, and 8 kPa as 7.94±0.58 kPa. However, lateral TTP method revealed a reconstruction of materials having shear modulus of 1.33 kPa as of 1.31 ± 0.03 kPa, and 8 kPa as 2.77 ± 0.08. Finally, Gaussian fitting can be used to enhance results obtained from Lateral TTP algorithm by providing a more accurate reconstruction of materials shear modulus.

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“…Several potential applications have been identified, including the detection of tumours in soft tissue [3,11,25], the monitoring of atherosclerosis [7,23] and the measurement of skin elasticity [27,6]. This paper is concerned with quasi-static strain imaging [21], which is achieved in 2D by comparing radio-frequency (RF) echo signals from two or more B-scans with a small difference in the axial compression applied through the ultrasound probe.…”

Section: Introductionmentioning

confidence: 99%

A New Method for the Acquisition of Ultrasonic Strain Image Volumes

Housden¹,

Chen²,

Gee³

et al. 2011

Ultrasound in Medicine & Biology

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This paper presents a new method for acquiring 3D volumes of ultrasonic axial strain data. The method uses a mechanically-swept probe to sweep out a single volume while applying a continuously varying axial compression. We examine the image quality and ease of use of the new method with in vitro and in vivo experiments. The new method is easier to use than the current best alternative and so more reliably produces images of superior quality.

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Development and evaluation of a high-frequency ultrasound-based system for in vivo strain imaging of the skin

Cited by 72 publications

References 36 publications

Conventional ultrasonography and sonoelastography in the assessment of plaque psoriasis under topical corticosteroid treatment – work in progress

Conventional ultrasonography and sonoelastography in the assessment of plaque psoriasis under topical corticosteroid treatment – work in progress

A New Shear Wave Speed Estimation Method for Shear Wave Elasticity Imaging

A New Method for the Acquisition of Ultrasonic Strain Image Volumes

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