scholarly journals Changes in Muscle Stiffness in Infants with Congenital Muscular Torticollis

Diagnostics ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 158
Author(s):  
Hwang ◽  
Shin ◽  
Choi ◽  
Jung ◽  
Yang
Keyword(s):  
Physical Therapy ◽  
Acoustic Radiation ◽  
Quantitative Measure ◽  
Muscle Thickness ◽  
Radiation Force ◽  
Muscle Stiffness ◽  
Acoustic Radiation Force Impulse ◽  
Congenital Muscular Torticollis ◽  
Arfi Elastography ◽  
Muscular Torticollis

Congenital muscular torticollis (CMT) results from unilateral shortening of the sternocleidomastoid (SCM) muscle, usually associated with a fibrotic mass. Although CMT may resolve with physical therapy, some cases persist, resulting in long-term musculoskeletal problems. It is therefore helpful to be able to monitor and predict the outcomes of physical therapy. Shear-wave velocity (SWV) determined by acoustic radiation force impulse (ARFI) elastography can provide a quantitative measure of muscle stiffness. We therefore measured SCM SWV in 22 infants with unilateral CMT before and after 3 months of physical therapy and evaluated the relationships between SWV and SCM thickness and various clinical features, including cervical range of motion (ROM). SWV was initially higher and the ROM was smaller in affected muscles before physical therapy. SWV decreased significantly (2.33 ± 0.47 to 1.56 ± 0.63 m/s, p < 0.001), indicating reduced stiffness, and muscle thickness also decreased after physical therapy (15.64 ± 5.24 to 11.36 ± 5.71 mm, p < 0.001), both in line with increased neck ROM of rotation (64.77 ± 18.87 to 87.27 ± 6.31°, p < 0.001) and lateral flexion (37.50 ± 11.31 to 53.64 ± 9.41°, p < 0.001). However, the improved ROM more closely reflected the changes in SWV than in muscle thickness. These results suggest that a change in SWV detected by ARFI elastography could help to predict improvements in clinical outcomes, such as stiffness-related loss of motion, in patients with CMT undergoing physical therapy.

scholarly journals Acoustic Radiation Force Impulse (ARFI) elastography quantification of muscle stiffness over a course of gradual isometric contractions: a preliminary study.

2015 ◽  
Vol 17 (1) ◽  
pp. 49 ◽  
Author(s):  
Alpaslan Yavuz ◽  
Aydin Bora ◽  
Mehmet Deniz Bulut ◽  
Abdussamet Batur ◽  
Aysel Milanlioglu ◽  
...  
Keyword(s):  
Acoustic Radiation ◽  
Imaging Modality ◽  
Radiation Force ◽  
Muscle Stiffness ◽  
Acoustic Radiation Force Impulse ◽  
Propagation Path ◽  
Neutral Position ◽  
Biceps Muscle ◽  
Extended Position ◽  
Arfi Elastography

Aims: To evaluate the feasibility of quantitative analysis of muscle stiffness by Acoustic Radiation Forced Impulse (ARFI) elastography over a course of graduate isometric voluntary contractions. Material and methods: The stiffness of the bilateral biceps muscle of 13 healthy volunteers was measured in real time by ARFI elastography, while the forearm was in neutral- extended position, 90 degree self-flexed positions and 90 degree self-flexed position, with altered weights ranging from 1 to 8 kg placed on flattened palmar surfaces consecutively. The determined increases in biceps muscle stiffness were measured for both arms and correlated with the loadings weights adopted at progressive trial stages. Results: The mean shear wave velocity (SWV) values of biceps muscles in a neutral position, in 90 degree flex position and 90 degree flex position with 1 to 8 kg weights on palmar surfaces were 2.162±0.302 m/sec, 3.382±0.581 m/sec, and 3.897±0.585 to 5.562±0.587 m/sec, re- spectively. Significant correlations between the muscle SWV values and related palmar weights and between the SWV values of right and left sides at different trial stages were identified (r=0.951 and r=0.954, respectively). A mutual propagation path of deep regions to entire areas was described to account for the distribution of increase in stiffness with increases in palmar weights. The confidence of method regarding inter-observer difference was confirmed by the correlation analyses of the re- sults (r=0.998). Conclusions: ARFI elastography is a feasible imaging modality for quantifying the stiffness of isometrically voluntarily contracting muscles.

Acoustic radiation force impulse (ARFI) elastography to asses maternal and foetal structures in pregnant ewes

2018 ◽  
Vol 54 (3) ◽  
pp. 498-505 ◽  
Author(s):  
Priscila D. A. Silva ◽  
Ricardo Andrés R. Uscategui ◽  
Victor J. C. Santos ◽  
Augusto R. Taira ◽  
Renata S. G. Mariano ◽  
...  
Keyword(s):  
Acoustic Radiation ◽  
Radiation Force ◽  
Acoustic Radiation Force ◽  
Acoustic Radiation Force Impulse ◽  
Arfi Elastography

scholarly journals Acoustic Radiation Force Impulse (ARFI) Elastography in Autoimmune and Cholestatic Liver Diseases

2019 ◽  
Vol 18 (1) ◽  
pp. 23-29 ◽  
Author(s):  
Ruediger S. Goertz ◽  
Luise GaBmann ◽  
Deike Strobel ◽  
Dane Wildner ◽  
Barbara Schellhaas ◽  
...  
Keyword(s):  
Liver Diseases ◽  
Acoustic Radiation ◽  
Radiation Force ◽  
Acoustic Radiation Force ◽  
Acoustic Radiation Force Impulse ◽  
Arfi Elastography

Performance of Acoustic Radiation Force Impulse Elastography for Staging Liver Fibrosis in Patients With Chronic Hepatitis C After Viral Eradication

2019 ◽  
Vol 70 (1) ◽  
pp. 114-122 ◽  
Author(s):  
Sheng-Hung Chen ◽  
Hsueh-Chou Lai ◽  
I-Ping Chiang ◽  
Wen-Pang Su ◽  
Chia-Hsin Lin ◽  
...  
Keyword(s):  
Chronic Hepatitis ◽  
Hepatitis C ◽  
Liver Fibrosis ◽  
Chronic Hepatitis C ◽  
Acoustic Radiation ◽  
Radiation Force ◽  
Acoustic Radiation Force ◽  
Acoustic Radiation Force Impulse ◽  
Viral Eradication ◽  
Arfi Elastography

Abstract Background Data on noninvasive liver fibrosis staging after viral eradication are unclear. This histology-based study validated the performance of liver stiffness (LS) measurements after viral eradication. Methods Consecutive participants with chronic hepatitis C (CHC) who received concomitant LS measurements through acoustic radiation force impulse (ARFI) elastography and percutaneous liver biopsy were prospectively screened and analyzed. Results Of the 644 patients, 521 (80.9%) underwent a biopsy at treatment baseline, and the remaining 123 (19.1%) underwent a biopsy at 3 years (median; interquartile range, 0.1) after the sustained virological response (SVR) to pegylated interferon–based and direct-acting antiviral treatments. The proportions of histological fibrosis stages did not differ significantly between the pretreatment and post-SVR groups (P = .0615). However, the LS values differed significantly (P &lt; .0001). The median LS values (presented as shear wave velocities in meters per second) were 1.51 (0.92) for the pretreatment group and 1.22 (0.77) for the post-SVR group. The cutoffs (areas under the receiver operating characteristic curve, obtained using the bootstrap method) to dichotomize between METAVIR fibrosis stage F1 versus stages F2–F4, F1–F2 versus F3–F4, and F1–F3 versus F4 were 1.47 (0.8333, 95% confidence interval [CI] 0.7981–0.8663), 1.81 (0.8763, 95% CI 0.8376–0.9107), and 1.86 (0.8811, 95% CI 0.8378–0.9179) in the pretreatment group, respectively, and 1.22 (0.7872, 95% CI 0.7001–0.8624), 1.59 (0.8808, 95% CI 0.8034–0.9422), and 1.75 (0.9018, 95% CI 0.8201–0.9644) in the post-SVR group, respectively. Conclusions The performance of LS measurements through ARFI elastography is promising to determine the liver fibrosis stage on necroinflammation-resolved histology in CHC after viral eradication.

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