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Wearing SC, Hooper SL, Langton CM, Keiner M, Horstmann T, Crevier-Denoix N, Pourcelot P. The Biomechanics of Musculoskeletal Tissues during Activities of Daily Living: Dynamic Assessment Using Quantitative Transmission-Mode Ultrasound Techniques. Healthcare (Basel) 2024; 12:1254. [PMID: 38998789 DOI: 10.3390/healthcare12131254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2024] [Revised: 06/18/2024] [Accepted: 06/19/2024] [Indexed: 07/14/2024] Open
Abstract
The measurement of musculoskeletal tissue properties and loading patterns during physical activity is important for understanding the adaptation mechanisms of tissues such as bone, tendon, and muscle tissues, particularly with injury and repair. Although the properties and loading of these connective tissues have been quantified using direct measurement techniques, these methods are highly invasive and often prevent or interfere with normal activity patterns. Indirect biomechanical methods, such as estimates based on electromyography, ultrasound, and inverse dynamics, are used more widely but are known to yield different parameter values than direct measurements. Through a series of literature searches of electronic databases, including Pubmed, Embase, Web of Science, and IEEE Explore, this paper reviews current methods used for the in vivo measurement of human musculoskeletal tissue and describes the operating principals, application, and emerging research findings gained from the use of quantitative transmission-mode ultrasound measurement techniques to non-invasively characterize human bone, tendon, and muscle properties at rest and during activities of daily living. In contrast to standard ultrasound imaging approaches, these techniques assess the interaction between ultrasound compression waves and connective tissues to provide quantifiable parameters associated with the structure, instantaneous elastic modulus, and density of tissues. By taking advantage of the physical relationship between the axial velocity of ultrasound compression waves and the instantaneous modulus of the propagation material, these techniques can also be used to estimate the in vivo loading environment of relatively superficial soft connective tissues during sports and activities of daily living. This paper highlights key findings from clinical studies in which quantitative transmission-mode ultrasound has been used to measure the properties and loading of bone, tendon, and muscle tissue during common physical activities in healthy and pathological populations.
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Affiliation(s)
- Scott C Wearing
- School of Medicine and Health, Technical University of Munich, 80992 Munich, Bavaria, Germany
| | - Sue L Hooper
- School of Health, University of the Sunshine Coast, Sippy Downs, QLD 4556, Australia
| | - Christian M Langton
- Griffith Centre of Rehabilitation Engineering, Griffith University, Southport, QLD 4222, Australia
| | - Michael Keiner
- Department of Exercise and Training Science, German University of Health and Sport, 85737 Ismaning, Bavaria, Germany
| | - Thomas Horstmann
- School of Medicine and Health, Technical University of Munich, 80992 Munich, Bavaria, Germany
| | | | - Philippe Pourcelot
- INRAE, BPLC Unit, Ecole Nationale Vétérinaire d'Alfort, 94700 Maisons-Alfort, France
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Xiao D, Torre PDL, Yu ACH. Real-Time Speed-of-Sound Estimation In Vivo via Steered Plane Wave Ultrasound. IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 2024; 71:673-686. [PMID: 38687663 DOI: 10.1109/tuffc.2024.3395490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Speed-of-sound (SoS) is an intrinsic acoustic property of human tissues and has been regarded as a potential biomarker of tissue health. To foster the clinical use of this emerging biomarker in medical diagnostics, it is important for SoS estimates to be derived and displayed in real time. Here, we demonstrate that concurrent global SoS estimation and B-mode imaging can be achieved live on a portable ultrasound scanner. Our innovation is hinged upon the design of a novel pulse-echo SoS estimation framework that is based on steered plane wave imaging. It has accounted for the effects of refraction and imaging depth when the medium SoS differs from the nominal value of 1540 m/s that is conventionally used in medical imaging. The accuracy of our SoS estimation framework was comparatively analyzed with through-transmit time-of-flight measurements in vitro on 15 custom agar phantoms with different SoS values (1508-1682 m/s) and in vivo on human calf muscles ( N = 9 ; SoS range: 1560-1586 m/s). Our SoS estimation framework has a mean signed difference (MSD) of - 0.6 ± 2.3 m/s in vitro and - 2.2 ± 11.2 m/s in vivo relative to the reference measurements. In addition, our real-time system prototype has yielded simultaneous SoS estimates and B-mode imaging at an average frame rate of 18.1 fps. Overall, by realizing real-time tissue SoS estimation with B-mode imaging, our innovation can foster the use of tissue SoS as a biomarker in medical ultrasound diagnostics.
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Virto N, Río X, Angulo-Garay G, García Molina R, Avendaño Céspedes A, Cortés Zamora EB, Gómez Jiménez E, Alcantud Córcoles R, Rodriguez Mañas L, Costa-Grille A, Matheu A, Marcos-Pérez D, Lazcano U, Vergara I, Arjona L, Saeteros M, Lopez-de-Ipiña D, Coca A, Abizanda Soler P, Sanabria SJ. Development of Continuous Assessment of Muscle Quality and Frailty in Older Patients Using Multiparametric Combinations of Ultrasound and Blood Biomarkers: Protocol for the ECOFRAIL Study. JMIR Res Protoc 2024; 13:e50325. [PMID: 38393761 PMCID: PMC10924264 DOI: 10.2196/50325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 12/11/2023] [Accepted: 01/02/2024] [Indexed: 02/25/2024] Open
Abstract
BACKGROUND Frailty resulting from the loss of muscle quality can potentially be delayed through early detection and physical exercise interventions. There is a demand for cost-effective tools for the objective evaluation of muscle quality, in both cross-sectional and longitudinal assessments. Literature suggests that quantitative analysis of ultrasound data captures morphometric, compositional, and microstructural muscle properties, while biological assays derived from blood samples are associated with functional information. OBJECTIVE This study aims to assess multiparametric combinations of ultrasound and blood-based biomarkers to offer a cross-sectional evaluation of the patient frailty phenotype and to track changes in muscle quality associated with supervised exercise programs. METHODS This prospective observational multicenter study will include patients aged 70 years and older who are capable of providing informed consent. We aim to recruit 100 patients from hospital environments and 100 from primary care facilities. Each patient will undergo at least two examinations (baseline and follow-up), totaling a minimum of 400 examinations. In hospital environments, 50 patients will be measured before/after a 16-week individualized and supervised exercise program, while another 50 patients will be followed up after the same period without intervention. Primary care patients will undergo a 1-year follow-up evaluation. The primary objective is to compare cross-sectional evaluations of physical performance, functional capacity, body composition, and derived scales of sarcopenia and frailty with biomarker combinations obtained from muscle ultrasound and blood-based assays. We will analyze ultrasound raw data obtained with a point-of-care device, along with a set of biomarkers previously associated with frailty, using quantitative real-time polymerase chain reaction and enzyme-linked immunosorbent assay. Additionally, we will examine the sensitivity of these biomarkers to detect short-term muscle quality changes and functional improvement after a supervised exercise intervention compared with usual care. RESULTS At the time of manuscript submission, the enrollment of volunteers is ongoing. Recruitment started on March 1, 2022, and ends on June 30, 2024. CONCLUSIONS The outlined study protocol will integrate portable technologies, using quantitative muscle ultrasound and blood biomarkers, to facilitate an objective cross-sectional assessment of muscle quality in both hospital and primary care settings. The primary objective is to generate data that can be used to explore associations between biomarker combinations and the cross-sectional clinical assessment of frailty and sarcopenia. Additionally, the study aims to investigate musculoskeletal changes following multicomponent physical exercise programs. TRIAL REGISTRATION ClinicalTrials.gov NCT05294757; https://clinicaltrials.gov/ct2/show/NCT05294757. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID) DERR1-10.2196/50325.
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Affiliation(s)
- Naiara Virto
- Department of Physical Activity and Sport Science, Faculty of Education and Sport, University of Deusto, Bilbao, Spain
| | - Xabier Río
- Department of Physical Activity and Sport Science, Faculty of Education and Sport, University of Deusto, Bilbao, Spain
| | - Garazi Angulo-Garay
- Department of Physical Activity and Sport Science, Faculty of Education and Sport, University of Deusto, Bilbao, Spain
| | - Rafael García Molina
- Department of Geriatrics, Complejo Hospitalario Universitario de Albacete, Albacete, Spain
- Center for Biomedical Research Network on Fragility and Healthy Aging (CIBERfes), Instituto de Salud Carlos III, Madrid, Spain
| | - Almudena Avendaño Céspedes
- Department of Geriatrics, Complejo Hospitalario Universitario de Albacete, Albacete, Spain
- Center for Biomedical Research Network on Fragility and Healthy Aging (CIBERfes), Instituto de Salud Carlos III, Madrid, Spain
- Facultad de Enfermería de Albacete, Universidad de Castilla-La Mancha, Albacete, Spain
| | - Elisa Belen Cortés Zamora
- Department of Geriatrics, Complejo Hospitalario Universitario de Albacete, Albacete, Spain
- Center for Biomedical Research Network on Fragility and Healthy Aging (CIBERfes), Instituto de Salud Carlos III, Madrid, Spain
| | - Elena Gómez Jiménez
- Department of Geriatrics, Complejo Hospitalario Universitario de Albacete, Albacete, Spain
| | - Ruben Alcantud Córcoles
- Department of Geriatrics, Complejo Hospitalario Universitario de Albacete, Albacete, Spain
- Center for Biomedical Research Network on Fragility and Healthy Aging (CIBERfes), Instituto de Salud Carlos III, Madrid, Spain
| | - Leocadio Rodriguez Mañas
- Center for Biomedical Research Network on Fragility and Healthy Aging (CIBERfes), Instituto de Salud Carlos III, Madrid, Spain
- Geriatrics Department, University Hospital of Getafe, Getafe, Spain
| | | | - Ander Matheu
- Center for Biomedical Research Network on Fragility and Healthy Aging (CIBERfes), Instituto de Salud Carlos III, Madrid, Spain
- Biodonostia, Health Research Institute, Donostia, Spain
- IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
| | - Diego Marcos-Pérez
- Department of Geriatrics, Complejo Hospitalario Universitario de Albacete, Albacete, Spain
| | - Uxue Lazcano
- Biodonostia, Health Research Institute, Donostia, Spain
| | - Itziar Vergara
- Biodonostia, Health Research Institute, Donostia, Spain
- IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
- Osakidetza, Health Care Department, Research Unit APOSIs, Gipuzkoa, Spain
- Research Network in Chronicity, Primary Care and Health Promotion (RICAPPS), Barakaldo, Spain
| | - Laura Arjona
- Deusto Institute of Technology, University of Deusto, Bilbao, Spain
| | - Morelva Saeteros
- Deusto Institute of Technology, University of Deusto, Bilbao, Spain
| | | | - Aitor Coca
- Department of Physical Activity and Sports Sciences, Faculty of Health Sciences, Euneiz University, Vitoria-Gasteiz, Spain
| | - Pedro Abizanda Soler
- Department of Geriatrics, Complejo Hospitalario Universitario de Albacete, Albacete, Spain
- Center for Biomedical Research Network on Fragility and Healthy Aging (CIBERfes), Instituto de Salud Carlos III, Madrid, Spain
- Facultad de Medicina de Albacete, Universidad de Castilla-La Mancha, Albacete, Spain
| | - Sergio J Sanabria
- IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
- Deusto Institute of Technology, University of Deusto, Bilbao, Spain
- Department of Radiology, Stanford University, Palo Alto, CA, United States
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Salemi Yolgunlu P, Korta Martiartu N, Gerber UR, Frenz M, Jaeger M. Excluding Echo Shift Noise in Real-Time Pulse-Echo Speed-of-Sound Imaging. SENSORS (BASEL, SWITZERLAND) 2023; 23:5598. [PMID: 37420762 DOI: 10.3390/s23125598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 06/08/2023] [Accepted: 06/09/2023] [Indexed: 07/09/2023]
Abstract
Computed ultrasound tomography in echo mode (CUTE) allows real-time imaging of the tissue speed of sound (SoS) using handheld ultrasound. The SoS is retrieved by inverting a forward model that relates the spatial distribution of the tissue SoS to echo shift maps detected between varying transmit and receive angles. Despite promising results, in vivo SoS maps often show artifacts due to elevated noise in echo shift maps. To minimize artifacts, we propose a technique where an individual SoS map is reconstructed for each echo shift map separately, as opposed to a single SoS map from all echo shift maps simultaneously. The final SoS map is then obtained as a weighted average over all SoS maps. Due to the partial redundancy between different angle combinations, artifacts that appear only in a subset of the individual maps can be excluded via the averaging weights. We investigate this real-time capable technique in simulations using two numerical phantoms, one with a circular inclusion and one with two layers. Our results demonstrate that the SoS maps reconstructed using the proposed technique are equivalent to the ones using simultaneous reconstruction when considering uncorrupted data but show significantly reduced artifact level for data that are corrupted by noise.
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Affiliation(s)
- Parisa Salemi Yolgunlu
- Institute of Applied Physics, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
| | - Naiara Korta Martiartu
- Institute of Applied Physics, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
| | - Urs Richard Gerber
- Institute of Applied Physics, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
| | - Martin Frenz
- Institute of Applied Physics, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
| | - Michael Jaeger
- Institute of Applied Physics, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland
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Lortie J, Rush B, Osterbauer K, Colgan TJ, Tamada D, Garlapati S, Campbell TC, Traynor A, Leal T, Patel V, Helgager JJ, Lee K, Reeder SB, Kuchnia AJ. Myosteatosis as a Shared Biomarker for Sarcopenia and Cachexia Using MRI and Ultrasound. FRONTIERS IN REHABILITATION SCIENCES 2022; 3:896114. [PMID: 36189019 PMCID: PMC9397668 DOI: 10.3389/fresc.2022.896114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 04/25/2022] [Indexed: 12/03/2022]
Abstract
Purpose Establish bedside biomarkers of myosteatosis for sarcopenia and cachexia. We compared ultrasound biomarkers against MRI-based percent fat, histology, and CT-based muscle density among healthy adults and adults undergoing treatment for lung cancer. Methods We compared ultrasound and MRI myosteatosis measures among young healthy, older healthy, and older adults with non-small cell lung cancer undergoing systemic treatment, all without significant medical concerns, in a cross-sectional pilot study. We assessed each participant's rectus femoris ultrasound-based echo intensity (EI), shear wave elastography-based shear wave speed, and MRI-based proton density fat-fraction (PDFF). We also assessed BMI, rectus femoris thickness and cross-sectional area. Rectus femoris biopsies were taken for all older adults (n = 20) and we analyzed chest CT scans for older adults undergoing treatment (n = 10). We determined associations between muscle assessments and BMI, and compared these assessments between groups. Results A total of 10 young healthy adults, 10 older healthy adults, and 10 older adults undergoing treatment were recruited. PDFF was lower in young adults than in older healthy adults and older adults undergoing treatment (0.3 vs. 2.8 vs. 2.9%, respectively, p = 0.01). Young adults had significantly lower EI than older healthy adults, but not older adults undergoing treatment (48.6 vs. 81.8 vs. 75.4, p = 0.02). When comparing associations between measures, PDFF was strongly associated with EI (ρ = 0.75, p < 0.01) and moderately negatively associated with shear wave speed (ρ = −0.49, p < 0.01) but not BMI, whole leg cross-sectional area, or rectus femoris cross-sectional area. Among participants with CT scans, paraspinal muscle density was significantly associated with PDFF (ρ = −0.70, p = 0.023). Histological markers of inflammation or degradation did not differ between older adult groups. Conclusion PDFF was sensitive to myosteatosis between young adults and both older adult groups. EI was less sensitive to myosteatosis between groups, yet EI was strongly associated with PDFF unlike BMI, which is typically used in cachexia diagnosis. Our results suggest that ultrasound measures may serve to determine myosteatosis at the bedside and are more useful diagnostically than traditional weight assessments like BMI. These results show promise of using EI, shear wave speed, and PDFF proxies of myosteatosis as diagnostic and therapeutic biomarkers of sarcopenia and cachexia.
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Affiliation(s)
- Jevin Lortie
- Department of Nutritional Sciences, University of Wisconsin-Madison, Madison, WI, United States
- *Correspondence: Jevin Lortie
| | - Benjamin Rush
- Department of Nutritional Sciences, University of Wisconsin-Madison, Madison, WI, United States
| | - Katie Osterbauer
- Department of Nutritional Sciences, University of Wisconsin-Madison, Madison, WI, United States
| | - T. J. Colgan
- Department of Radiology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI, United States
| | - Daiki Tamada
- Department of Radiology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI, United States
| | - Sujay Garlapati
- Department of Nutritional Sciences, University of Wisconsin-Madison, Madison, WI, United States
| | - Toby C. Campbell
- Department of Medicine, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI, United States
| | - Anne Traynor
- Department of Medicine, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI, United States
| | - Ticiana Leal
- Department of Medicine, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI, United States
- Department of Hematology and Medical Oncology, Emory University School of Medicine, Atlanta, GA, United States
| | - Viharkumar Patel
- Department of Pathology, Harvard Medical School, Boston, MA, United States
| | - Jeffrey J. Helgager
- Department of Pathology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI, United States
| | - Kenneth Lee
- Department of Radiology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI, United States
| | - Scott B. Reeder
- Department of Radiology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI, United States
| | - Adam J. Kuchnia
- Department of Nutritional Sciences, University of Wisconsin-Madison, Madison, WI, United States
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Korta Martiartu N, Nakhostin D, Ruby L, Frauenfelder T, Rominger MB, Sanabria SJ. Speed of sound and shear wave speed for calf soft tissue composition and nonlinearity assessment. Quant Imaging Med Surg 2021; 11:4149-4161. [PMID: 34476195 DOI: 10.21037/qims-20-1321] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 04/13/2021] [Indexed: 12/25/2022]
Abstract
Background The purpose of this study was threefold: (I) to study the correlation of speed-of-sound (SoS) and shear-wave-speed (SWS) ultrasound (US) in the gastrocnemius muscle, (II) to use reproducible tissue compression to characterize tissue nonlinearity effects, and (III) to compare the potential of SoS and SWS for tissue composition assessment. Methods Twenty gastrocnemius muscles of 10 healthy young subjects (age range, 23-34 years, two females and eight males) were prospectively examined with both clinical SWS (GE Logiq E9, in m/s) and a prototype system that measures SoS (in m/s). A reflector was positioned opposite the US probe as a timing reference for SoS, with the muscle in between. Reproducible tissue compression was applied by reducing probe-reflector distance in 5 mm steps. The Ogden hyperelastic model and the acoustoelastic theory were used to characterize SoS and SWS variations with tissue compression and extract novel metrics related to tissue nonlinearity. The body fat percentage (BF%) of the subjects was estimated using bioelectrical impedance analysis. Results A weak negative correlation was observed between SWS and SoS (r=-0.28, P=0.002). SWS showed an increasing trend with increasing tissue compression (P=0.10) while SoS values decayed nonlinearly (P<0.001). The acoustoelastic modeling showed a weak correlation for SWS (r=-0.36, P<0.001) but a very strong correlation for SoS (r=0.86, P<0.001), which was used to extract the SoS acoustoelastic parameter. SWS showed higher variability between both calves [intraclass correlation coefficient (ICC) =0.62, P=0.08] than SoS (ICC =0.91, P<0.001). Correlations with BF% were strong and positive for SWS (r=0.60, P<0.001), moderate and negative for SoS (r=-0.43, P=0.05), and moderate positive for SoS acoustoelastic parameter (r=0.48, P=0.03). Conclusions SWS and SoS provide independent information about tissue elastic properties. SWS correlated stronger with BF% than SoS, but measurements were less reliable. SoS enabled the extraction of novel metrics related to tissue nonlinearity with potential complementary information.
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Affiliation(s)
- Naiara Korta Martiartu
- Zurich Ultrasound Research and Translation (ZURT), Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zürich, Switzerland
| | - Dominik Nakhostin
- Zurich Ultrasound Research and Translation (ZURT), Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zürich, Switzerland
| | - Lisa Ruby
- Zurich Ultrasound Research and Translation (ZURT), Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zürich, Switzerland
| | - Thomas Frauenfelder
- Zurich Ultrasound Research and Translation (ZURT), Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zürich, Switzerland
| | - Marga B Rominger
- Zurich Ultrasound Research and Translation (ZURT), Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zürich, Switzerland
| | - Sergio J Sanabria
- Zurich Ultrasound Research and Translation (ZURT), Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zürich, Switzerland.,Deusto Institute of Technology, University of Deusto/IKERBASQUE, Basque Foundation for Science, Bilbao, Basque Country, Spain
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Ruby L, Sanabria SJ, Saltybaeva N, Frauenfelder T, Alkadhi H, Rominger MB. Comparison of ultrasound speed-of-sound of the lower extremity and lumbar muscle assessed with computed tomography for muscle loss assessment. Medicine (Baltimore) 2021; 100:e25947. [PMID: 34032704 PMCID: PMC8154376 DOI: 10.1097/md.0000000000025947] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 04/23/2021] [Indexed: 01/04/2023] Open
Abstract
To compare the speed of propagation of ultrasound (US) waves (SoS) of the lower leg with the clinical reference standard computed tomography (CT) at the level of lumbar vertebra 3 (L3) for muscle loss assessment. Both calf muscles of 50 patients scheduled for an abdominal CT were prospectively examined with ultrasound. A plexiglas-reflector located on the opposite side of the probe with the calf in between was used as a timing reference for SoS (m/s). CT measurements were performed at the level of L3 and included area (cm2) and attenuation (HU) of the psoas muscle, abdominal muscles, subcutaneous fat, visceral fat and abdominal area. Correlations between SoS, body mass index (BMI) and CT were determined using Pearson's correlation coefficient. Based on reported CT sarcopenia threshold values, receiver operating characteristic (ROC) analysis was performed for SoS. Inter-examiner agreement was assessed with the median difference, inter-quartile range (IQR) and intraclass correlation coefficients. SoS of the calf correlated moderately with abdominal muscle attenuation (r = 0.48; P < .001), psoas muscle attenuation (r = 0.40; P < .01), abdominal area (r = -0.44; P < .01) and weakly with subcutaneous fat area (r = -0.37; P < .01). BMI correlated weakly with psoas attenuation (r = -0.28; P < .05) and non-significantly with abdominal muscle attenuation. Normalization with abdominal area resulted in moderate correlations with abdominal muscle area for SoS (r = 0.43; P < .01) and BMI (r = -0.46; P < .001). Based on sarcopenia threshold values for skeletal muscle attenuation (SMRA), area under curve (AUC) for SoS was 0.724. Median difference between both examiners was -3.4 m/s with IQR = 15.1 m/s and intraclass correlation coefficient = 0.794. SoS measurements of the calf are moderately accurate based on CT sarcopenia threshold values, thus showing potential for muscle loss quantification.
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Affiliation(s)
- Lisa Ruby
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zürich, Switzerland
| | - Sergio J. Sanabria
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zürich, Switzerland
- Deusto Institute of Technology, University of Deusto/IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
| | - Natalia Saltybaeva
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zürich, Switzerland
| | - Thomas Frauenfelder
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zürich, Switzerland
| | - Hatem Alkadhi
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zürich, Switzerland
| | - Marga B. Rominger
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zürich, Switzerland
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Ruby L, Sanabria SJ, Martini K, Frauenfelder T, Jukema GN, Goksel O, Rominger MB. Quantification of immobilization-induced changes in human calf muscle using speed-of-sound ultrasound: An observational pilot study. Medicine (Baltimore) 2021; 100:e23576. [PMID: 33725923 PMCID: PMC7982197 DOI: 10.1097/md.0000000000023576] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Accepted: 11/05/2020] [Indexed: 11/25/2022] Open
Abstract
Short-term immobilization leads to fatty muscular degeneration, which is associated with various negative health effects. Based on literature showing very high correlations between MRI Dixon fat fraction and Speed-of-Sound (SoS), we hypothesized that we can detect short-term-immobilization-induced differences in SoS.Both calves of 10 patients with a calf cast on one side for a mean duration of 41 ± 26 days were examined in relaxed position using a standard ultrasound machine. Calf perimeters were measured for both sides. A flat Plexiglas-reflector, placed vertically on the opposite side of the probe with the calf in-between, was used as a timing reference for SoS. SoS was both manually annotated by two readers and assessed by an automatic annotation algorithm. The thickness values of the subcutaneous fat and muscle layers were manually read from the B-mode images. Differences between the cast and non-cast calves were calculated with a paired t test. Correlation analysis of SoS and calf perimeter was performed using Pearson's correlation coefficient.Paired t test showed significant differences between the cast and non-cast side for both SoS (P < .01) and leg perimeter (P < .001). SoS was reduced with the number of days after cast installment (r = -0.553, P = .097). No significant differences were found for muscle layer thickness, subcutaneous fat layer thickness, mean fat echo intensity, or mean muscle echo intensity.Short-term-immobilization led to a significant reduction in SoS in the cast calf compared to the healthy calf, indicating a potential role of SoS as a biomarker in detecting immobilization-induced fatty muscular degeneration not visible on B-mode ultrasound.
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Affiliation(s)
- Lisa Ruby
- Zurich Ultrasound Research and Translation (ZURT), Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zürich, Switzerland
| | - Sergio J. Sanabria
- Zurich Ultrasound Research and Translation (ZURT), Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zürich, Switzerland
- Deusto Institute of Technology, University of Deusto / IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
| | - Katharina Martini
- Zurich Ultrasound Research and Translation (ZURT), Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zürich, Switzerland
| | - Thomas Frauenfelder
- Zurich Ultrasound Research and Translation (ZURT), Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zürich, Switzerland
| | - Gerrolt Nico Jukema
- Deusto Institute of Technology, University of Deusto / IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
- Department of Trauma, University Hospital Zurich
| | - Orcun Goksel
- Computer-assisted Applications in Medicine (CAiM), ETH Zurich, Zürich, Switzerland
| | - Marga B. Rominger
- Zurich Ultrasound Research and Translation (ZURT), Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zürich, Switzerland
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