The difference in passive tension applied to the muscles composing the hamstrings – Comparison among muscles using ultrasound shear wave elastography

Objectives. This study was conducted to compare clinicopathologic and radiologic factors between benign and malignant thyroid nodules and to evaluate the diagnostic performance of shear wave elastography (SWE) combined with B-mode ultrasonography (US) in differentiating malignant from benign thyroid nodules.Methods. This retrospective study included 92 consecutive patients with 95 thyroid nodules examined on B-mode US and SWE before US-guided fine-needle aspiration biopsy or surgical excision. B-mode US findings (composition, echogenicity, margin, shape, and calcification) and SWE elasticity parameters (maximum [Emax], mean, minimum, and nodule-to-normal parenchymal ratio of elasticity) were reviewed and compared between benign and malignant thyroid nodules. The diagnostic performance of B-mode US and SWE for predicting malignant thyroid nodules was analyzed. The optimal cutoff values of elasticity parameters for identifying malignancy were determined. Diagnostic performance was compared between B-mode US only, SWE only, and the combination of B-mode US with SWE.Results. On multivariate logistic regression analysis, age (odds ratio [OR], 0.90; P=0.028), a taller-than-wide shape (OR, 11.3; P=0.040), the presence of calcifications (OR, 15.0; P=0.021), and Emax (OR, 1.22; P=0.021) were independent predictors of malignancy in thyroid nodules. The combined use of B-mode US findings and SWE yielded improvements in sensitivity, the positive predictive value, the negative predictive value, and accuracy compared with the use of B-mode US findings only, but with no statistical significance.Conclusion. When SWE was combined with B-mode US, the diagnostic performance was better than when only B-mode US was used, although the difference was not statistically significant.

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No Association of Plantar Aponeurosis Stiffness with Medial Longitudinal Arch Stiffness

International Journal of Sports Medicine ◽

10.1055/a-1373-5734 ◽

2021 ◽

Author(s):

Hiroaki Noro ◽

Naokazu Miyamoto ◽

Naotoshi Mitsukawa ◽

Toshio Yanagiya

Keyword(s):

Shear Wave ◽

Wave Velocity ◽

Shear Wave Velocity ◽

Shear Wave Elastography ◽

Medial Longitudinal Arch ◽

Plantar Aponeurosis ◽

Longitudinal Arch ◽

The Difference ◽

Young Subjects

AbstractLower stiffness of the medial longitudinal arch is reportedly a risk factor for lower leg disorders. The plantar aponeurosis is considered essential to maintaining the medial longitudinal arch. It is therefore expected that medial longitudinal arch stiffness is influenced by plantar aponeurosis stiffness. However, this has not been experimentally demonstrated. We examined the relationship between the plantar aponeurosis stiffness and medial longitudinal arch stiffness in humans in vivo. Thirty young subjects participated in this study. The navicular height and shear wave velocity (an index of stiffness) of the plantar aponeurosis were measured in supine and single-leg standing positions, using B-mode ultrasonography and shear wave elastography, respectively. The medial longitudinal arch stiffness was calculated based on body weight, foot length, and the difference in navicular height between the supine and single-leg standing conditions (i. e., navicular drop). Shear wave velocity of the plantar aponeurosis in the supine and single-leg standing positions was not significantly correlated to medial longitudinal arch stiffness (spine: r=−0.14, P=0.45 standing: r=−0.16, P=0.41). The findings suggest that the medial longitudinal arch stiffness would be strongly influenced by the stiffness of foot structures other than the plantar aponeurosis.

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2D-shear wave elastography: number of acquisitions can be reduced according to clinical setting

Insights into Imaging ◽

10.1186/s13244-021-01090-7 ◽

2021 ◽

Vol 12 (1) ◽

Author(s):

Marco Dioguardi Burgio ◽

Jules Grégory ◽

Maxime Ronot ◽

Riccardo Sartoris ◽

Gilles Chatellier ◽

...

Keyword(s):

Shear Wave ◽

Liver Stiffness ◽

Shear Wave Elastography ◽

Mean Value ◽

Factors Affecting ◽

Absolute Value ◽

Factors Associated ◽

Supersonic Shear Imaging ◽

The Mean ◽

The Difference

Abstract Background The factors affecting intra-operator variability of two-dimensional shear wave elastography (2D-SWE) have not been clearly established. We evaluated 2D-SWE variability according to the number of measurements, clinical and laboratory features, and liver stiffness measurements (LSM). Methods At least three LSM were performed in 452 patients who underwent LSM by 2D-SWE (supersonic shear imaging) out of an initial database of 1650 patients. The mean value of the three LSM was our best measurement method. Bland–Altman plots were used to evaluate intra-operator variability when considering only one, or the first two measurements. Variability was assessed by taking the absolute value of the difference between the first LSM and the mean of the three LSM. Logistic regression was used to assess the factors associated with the highest tertile of variability. Results The limit of agreement was narrower with the mean of the first and second measurements than with each measurement taken separately (− 2.83 to 2.99 kPa vs. − 5.86 to 6.21 kPa and − 5.77 to 5.73 kPa for the first and second measurement, respectively). A BMI ≥ 25 kg/m2 and a first LSM by 2D-SWE ≥ 7.1 kPa increased the odds of higher variability by 3.4 and 3.9, respectively. Adding a second LSM didn’t change the variability in patients with BMI < 25 and a first LSM by 2D-SWE < 7.1 kPa. Conclusions Intra-operator variability of LSM by 2D-SWE increases with both a high BMI and high LSM value. In patients with BMI < 25 kg/m2 and a first LSM < 7.1 kPa we recommend performing only one LSM.

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Shear wave elastography as a new, non-invasive diagnostic modality for the diagnosis of penile elasticity: a prospective multicenter study

Therapeutic Advances in Urology ◽

10.1177/17562872211007978 ◽

2021 ◽

Vol 13 ◽

pp. 175628722110079

Author(s):

Ester Illiano ◽

Francesco Trama ◽

Antonio Ruffo ◽

Giuseppe Romeo ◽

Filippo Riccardo ◽

...

Keyword(s):

Shear Wave ◽

Shear Wave Elastography ◽

Diagnostic Modality ◽

Erectile Tissue ◽

Corpora Cavernosa ◽

Hardness Scale ◽

Cavernous Tissue ◽

Male Patients ◽

The Mean ◽

The Difference

Objective: Shear wave elastosonography (SWE) could be used to evaluate the elasticity of penile tissue. Few studies in the literature, however, have investigated its use in patients with erectile dysfunction (ED) or have attempted to correlate findings with International Index of Erectile Function (IIEF-5) scores. The primary aim of this study was to evaluate the characteristics of erectile tissue using SWE and to determine possible relationships with IIEF-5 and Erection Hardness Scale (EHS) scores. The secondary aim was to establish a cut-off SWE examination value over which cavernous tissue stiffness could contribute to a subsequent organic alteration. Methods: This prospective study included male patients 18−80 years of age who attended two general andrology clinics and underwent SWE. Subjects were divided into groups according to IIEF-5 score, and correlations between SWE and IIEF-5 and EHS questionnaire scores were explored. Results: A total of 270 subjects (mean age 46.7 ± 16.9 years) were included. ED was reflected by low IIEF-5 and EHS scores and a decrease in the mean elasticity of the corpora cavernosa according to SWE, although the difference between the left and right corpora cavernosa was not statistically significant. No statistically significant correlation was found between measurements of the corpora cavernosa (in kPa) and age. The optimal cut-off identified was 24.75 kPa. Conclusion: Results demonstrated that the mean elasticity of the corpora cavernosa according to SWE was correlated with IIEF-5 score and EHS score.

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Shoulder scaption is dependent on the behavior of the different partitions of the infraspinatus muscle

Surgical and Radiologic Anatomy ◽

10.1007/s00276-020-02674-6 ◽

2021 ◽

Author(s):

Kyosuke Hoshikawa ◽

Takuma Yuri ◽

Hugo Giambini ◽

Yoshiro Kiyoshige

Keyword(s):

Muscle Contraction ◽

Shear Wave ◽

Muscle Activity ◽

Shear Wave Elastography ◽

Muscle Stiffness ◽

Peak Activity ◽

Anatomical Studies ◽

Subsequent Decrease ◽

Infraspinatus Muscle ◽

The Difference

Abstract Purpose The purpose of this study was to investigate if the three partitions (superior, middle, and inferior partitions) of the infraspinatus muscle previously described in anatomical studies will present different behavior during scapular plane abduction (scaption) as described using shear-wave elastography, especially during initial range of motion. Methods Eight volunteers held their arm against gravity 15° intervals from 30° to 150° in scaption. Shear-wave elastography was implemented at each position to measure shear modulus at rest and during muscle contraction, as a surrogate for muscle stiffness, of each partition. Muscle activity was defined as the difference in stiffness values between the resting positions and those during muscle contraction (ΔE = stiffness at contraction—stiffness at rest). Results The activity value for the middle partition was 25.1 ± 10.8 kPa at 30° and increased up to 105° (52.2 ± 10.8 kPa), with a subsequent decrease at larger angle positions (p < .001). The superior partition showed a flatter and constant behavior with smaller activity values except at higher angles (p < .001). Peak activity values for the superior partition were observed at 135° (23.0 ± 12.0 kPa). Increase activity for inferior partition began at 60° and showed a peak at 135° (p < .001; 32.9 ± 13.8 kPa). Conclusion Stiffness measured using shear-wave elastography in each partition of the infraspinatus muscle demonstrated different behavior between these partitions during scaption. The middle partition generated force throughout scaption, while the superior and inferior partitions exerted force at end range.

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OC25.01: Evaluation of the difference of elastic modulus between contracting and resting state of levator ani muscle measured by real-time shear wave elastography

Ultrasound in Obstetrics and Gynecology ◽

10.1002/uog.19371 ◽

2018 ◽

Vol 52 ◽

pp. 59-59

Author(s):

Y. Wang ◽

L. Liu

Keyword(s):

Elastic Modulus ◽

Real Time ◽

Shear Wave ◽

Resting State ◽

Shear Wave Elastography ◽

Levator Ani ◽

Levator Ani Muscle ◽

The Difference

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Quantitative Evaluation of Real-Time Shear-Wave Elastography under Deep Learning in Children with Chronic Kidney Disease

Scientific Programming ◽

10.1155/2022/6051695 ◽

2022 ◽

Vol 2022 ◽

pp. 1-9

Author(s):

Jie Zhang ◽

Cuirong Duan ◽

Xingxing Duan ◽

Yuan Hu ◽

Jinqiao Liu ◽

...

Keyword(s):

Chronic Kidney Disease ◽

Deep Learning ◽

Kidney Disease ◽

Real Time ◽

Shear Wave ◽

Left Kidney ◽

Shear Wave Elastography ◽

Control Group ◽

The Difference ◽

The Right

Objective. This research was to study the application value of real-time shear wave elastography (SWE) quantitative evaluation based on deep learning (DL) in the diagnosis of chronic kidney disease (CKD) in children. Methods. 60 children with pathological diagnoses of CKD were selected as a CKD group. During the same period, 45 healthy children for physical examination were selected as the control group. The application value of real-time shear-wave elastography based on DL in the evaluation of CKD in children was explored by comparing the differences between the two groups. Results. It was found that the elastic modulus values of the middle and lower parenchyma of the left kidney and right kidney in the case group were (22.02 ± 10.98) kPa and (21.99 ± 11.87) kPa, respectively, which were substantially higher compared with (4.61 ± 0.47) kPa and (4.50 ± 0.59) kPa in the control group. Young’s modulus (YM) of the middle and lower parenchyma of the left kidney in patients with CKD stages 3 to 5 was 13.27 ± 0.83, 24.21 ± 5.69, and 31.67 ± 3.82, respectively, and that of the right kidney was 17.26 ± 0.98, 26.76 ± 7.22, and 32.37 ± 4.27, respectively, and the difference was significant ( P < 0.05). In patients with moderate and severe CKD, the YM values of the middle and lower parenchyma of the left kidney were 17.27 ± 0.83, 27.93 ± 6.49, and those of the right kidney were 17.26 ± 0.98, 29.56 ± 6.49, respectively, and the difference was statistically significant ( P < 0.05). The serum creatinine (Scr) of the CKD group was substantially higher than that of the control group, and the estimated glomerular filtration rate (eGFR) level of the former was lower than that of the latter. However, there was no statistical difference between the YM values of the middle and lower parts of the left and right kidneys of the CKD group and the control group. Conclusion. The DL-based SWE is a new noninvasive, real-time, and quantitative detection method, which can effectively evaluate the stiffness of the kidney and help to better detect the progress of CKD as a clinical reference.

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Assessment of the Passive Tension of the First Dorsal Interosseous and First Lumbrical Muscles Using Shear Wave Elastography

The Journal Of Hand Surgery ◽

10.1016/j.jhsa.2019.01.016 ◽

2019 ◽

Vol 44 (12) ◽

pp. 1092.e1-1092.e8 ◽

Cited By ~ 1

Author(s):

Yudai Watanabe ◽

Kousuke Iba ◽

Keigo Taniguchi ◽

Mitsuhiro Aoki ◽

Tomoko Sonoda ◽

...

Keyword(s):

Shear Wave ◽

Shear Wave Elastography ◽

Passive Tension ◽

First Dorsal Interosseous ◽

Lumbrical Muscles

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Liver Elastography in Healthy Children Using Three Different Systems – How Many Measurements Are Necessary?

Ultraschall in der Medizin - European Journal of Ultrasound ◽

10.1055/a-1283-5906 ◽

2020 ◽

Author(s):

Anders Batman Mjelle ◽

Anesa Mulabecirovic ◽

Roald Flesland Havre ◽

Edda Jonina Olafsdottir ◽

Odd Helge Gilja ◽

...

Keyword(s):

Shear Wave ◽

Transient Elastography ◽

Intraclass Correlation ◽

Age Groups ◽

Liver Stiffness ◽

Shear Wave Elastography ◽

Healthy Children ◽

Significant Difference ◽

Pediatric Liver Disease ◽

Liver Elastography

Abstract Purpose Liver elastography is increasingly being applied in screening for and follow-up of pediatric liver disease, and has been shown to correlate well with fibrosis staging through liver biopsy. Because time is of the essence when examining children, we wanted to evaluate if a reliable result can be achieved with fewer acquisitions. Materials and Methods 243 healthy children aged 4–17 years were examined after three hours of fasting. Participants were divided into four age groups: 4–7 years; 8–11 years; 12–14 years and 15–17 years. Both two-dimensional shear wave elastography (2D-SWE; GE Logiq E9) and point shear wave elastography (pSWE; Samsung RS80A with Prestige) were performed in all participants, while transient elastography (TE, Fibroscan) was performed in a subset of 87 children aged 8–17 years. Median liver stiffness measurement (LSM) values of 3, 4, 5, 6, 7, and 8 acquisitions were compared with the median value of 10 acquisitions (reference standard). Comparison was performed for all participants together as well as within every specific age group. We investigated both the intraclass correlation coefficient (ICC) with absolute agreement and all outliers more than 10 %, 20 % or ≥ 0.5 or 1.0 kPa from the median of 10 acquisitions. Results For all three systems there was no significant difference between three and ten acquisitions, with ICCs ≥ 0.97. All systems needed 4 acquisitions to achieve no LSM deviating ≥ 1.0 kPa of a median of ten. To achieve no LSM deviating ≥ 20 % of a median of ten acquisitions, pSWE and TE needed 4 acquisitions, while 2D-SWE required 6 acquisitions. Conclusion Our results contradict recommendations of 10 acquisitions for pSWE and TE and only 3 for 2D-SWE.

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