scholarly journals Development and evaluation of a new methodology for Soft Tissue Artifact compensation in the lower limb

2021 ◽  
pp. 110464
Author(s):  
Bhrigu K. Lahkar ◽  
Pierre-Yves Rohan ◽  
Ayman Assi ◽  
Helene Pillet ◽  
Xavier Bonnet ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Lower Limb ◽  
Soft Tissue Artifact

scholarly journals Development and evaluation of a new methodology for Soft Tissue Artifact compensation in the lower limb

2021 ◽  
Author(s):  
Bhrigu K. Lahkar ◽  
Pierre-Yves Rohan ◽  
Ayman Assi ◽  
Helene Pillet ◽  
Xavier Bonnet ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Knee Joint ◽  
Lower Limb ◽  
Healthy Subjects ◽  
Motor Task ◽  
Joint Kinematics ◽  
Skin Marker ◽  
Flexion Extension ◽  
Knee Joint Kinematics ◽  
Soft Tissue Artifact

AbstractSkin Marker (SM) based motion capture is the most widespread technique used for motion analysis. Yet, the accuracy is often hindered by Soft Tissue Artifact (STA). This is a major issue in clinical gait analysis where kinematic results are used for decision-making. It also has a considerable influence on the results of rigid body and Finite Element (FE) musculoskeletal models that rely on SM-based kinematics to estimate muscle, contact and ligament forces. Current techniques designed to compensate for STA, in particular multi-body optimization methods, assume anatomical simplifications to define joint constraints. These methods, however, cannot adapt to subjects’ bone morphology, particularly for patients with joint lesions, nor easily can account for subject- and location-dependent STA. In this perspective, we propose to develop a conceptual FE based model of the lower limb for STA compensation and evaluate it for 66 healthy subjects under level walking motor task.Both hip and knee joint kinematics were analyzed, considering both rotational and translational joint motion. Results showed that STA caused underestimation of the hip joint kinematics (up to 2.2°) for all rotational DoF, and overestimation of knee joint kinematics (up to 12°) except in flexion/extension. Joint kinematics, in particular the knee joint, appeared to be sensitive to soft tissue stiffness parameters (rotational and translational mean difference up to 1.5° and 3.4 mm). Analysis of the results using alternative joint representations highlighted the versatility of the proposed modeling approach. This work paves the way for using personalized models to compensate for STA in healthy subjects and different activities.

Quantifying the Spatial Variation of Lower-Limb Soft Tissue Artefact During Functional Activity Using MR Imaging and X-Ray Fluoroscopy

2009 ◽  
Author(s):  
Massoud Akbarshahi ◽  
Justin W. Fernandez ◽  
Anthony Schache ◽  
Richard Baker ◽  
Scott Banks ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Lower Limb ◽  
Imaging Techniques ◽  
Three Dimensional ◽  
X Ray ◽  
Non Invasive ◽  
3D Motion Analysis ◽  
X Ray Imaging ◽  
Tissue Interface ◽  
Soft Tissue Artifact

Non-rigid movement of the soft tissue interface between skin-mounted markers and the underlying bones, also known as soft tissue artifact (STA), poses a major limitation to the non-invasive estimation of joint kinematics using three-dimensional (3D) motion analysis systems. Thorough knowledge of the nature of this non-rigid behavior is essential for development of compensation algorithms to enhance the accuracy of these systems. The studies in the literature aimed at quantifying STA have implemented invasive measurement methods such as bone pins [1] and external fixator devices [2], or have used subjects with pathological conditions [3]. In the present study, we integrated Magnetic Resonance (MR) and X-ray imaging techniques to evaluate the non-rigid behavior of the lower-limb soft tissue of healthy adults for a number of different functional tasks.

Quantification of soft tissue artifact in lower limb human motion analysis: A systematic review

2010 ◽  
Vol 31 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Alana Peters ◽  
Brook Galna ◽  
Morgan Sangeux ◽  
Meg Morris ◽  
Richard Baker
Keyword(s):  
Systematic Review ◽  
Soft Tissue ◽  
Motion Analysis ◽  
Lower Limb ◽  
Human Motion ◽  
Human Motion Analysis ◽  
Soft Tissue Artifact

The October 2005 Earthquake in Northern Pakistan: Pattern of Injuries in Victims Brought to the Emergency Relief Hospital, Doraha, Mansehra

2009 ◽  
Vol 24 (6) ◽  
pp. 535-539 ◽  
Author(s):  
Fahad Sami ◽  
Fahad Ali ◽  
Syed Habib Haider Zaidi ◽  
Hiba Rehman ◽  
Tashfeen Ahmad ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Lower Limb ◽  
Soft Tissue Injuries ◽  
The Body ◽  
Northern Pakistan ◽  
Cross Sectional ◽  
Emergency Relief ◽  
Medical Needs ◽  
Bone Injury ◽  
Tissue Injuries

AbstractObjective:Knowledge of injuries of earthquake victims is important to plan relief efforts. This cross-sectional study was conducted following the 08 October 2005 earthquake in Northern Pakistan to determine the pattern of injuries sustained and their relationship with age and gender in order to identify the medical needs in an earthquake-affected zone.Methods:The study was conducted between 13 October and 23 October 2005 at the Emergency Relief Hospital, Doraha, Mansehra. From the 1,700 patients registered in the hospital, 310 were sampled randomly for the study. Demography and details of the patients' injuries were noted by history and physical examination. Twelve cases were omitted due to incomplete data.Results:Of the cases, 54% were female. Children ≤10 years old formed the largest age group. Isolated bone injuries were present in 41%, soft tissue injuries in 36%, and mixed injuries in 23% of the patients.The most common bone injury was lower limb fracture (52%), while the most common non-bone injury was non-infected, soft tissue wounds on the limbs (33%). Among patients with soft tissue injuries, gangrenous wounds were present in 9%, and grossly infected wounds in 30% (20% on limbs and 10% on rest of the body).Conclusions:The population injured during the earthquake showed a higher proportion of females and children ≤10 years old, and lower limb bone injuries. The data highlight the need to address orthopedic, pediatric, and women's health issues, and for logistic arrangement of relevant diagnostic and therapeutic facilities at the initial stages of relief activities after earthquakes.

scholarly journals Bone Pose Estimation in the Presence of Soft Tissue Artifact Using Triangular Cosserat Point Elements

2015 ◽  
Vol 44 (4) ◽  
pp. 1181-1190 ◽  
Author(s):  
Dana Solav ◽  
M. B. Rubin ◽  
Andrea Cereatti ◽  
Valentina Camomilla ◽  
Alon Wolf
Keyword(s):  
Soft Tissue ◽  
Pose Estimation ◽  
Cosserat Point ◽  
Soft Tissue Artifact

scholarly journals Intravascular Shunt in Management of Limb Trauma- A Review

2021 ◽  
pp. 274-281
Author(s):  
Hashem Bark Awadh Abood ◽  
Abdulaziz Munahi Alanazi ◽  
Falah Bader Alhajraf ◽  
Wejdan Nawaf Mesfer Alotaibi ◽  
Bushra Saad Alghamdi ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Lower Limb ◽  
Patient Survival ◽  
Survival Rates ◽  
Tissue Loss ◽  
Vascular Injuries ◽  
Limb Trauma ◽  
Life Threatening ◽  
Arterial Insufficiency ◽  
Soft Tissue Loss

Vascular injuries to the upper or lower limb in the context of significant soft tissue loss, fractures, or other life-threatening injuries are associated with a high amputation rate. Complex extremity vascular injuries in which acute arterial insufficiency combined with severe or prolonged shocks are unacceptable because warm, warm, skeletal muscle time is often exceeded before adequate revascularization, and are associated with extended ischemia periods or fractures or soft tissue wounds. Revascularizing the limb is essential for the success of the limb rescue. Selective intravascular temporary shunting hence allows better overall care of the patient and can therefore be predicted to increase both limb rescue and patient survival rates. The aim of this article was to review and summarize results of previous literature regarding effectiveness on intravascular shunting as management of limb trauma as well as reviewing its potential complications.

scholarly journals Flap Decisions and Options in Soft Tissue Coverage of the Lower Limb

2014 ◽  
Vol 8 (1) ◽  
pp. 423-432 ◽  
Author(s):  
Daniel J Jordan ◽  
Marco Malahias ◽  
Sandip Hindocha ◽  
Ali Juma
Keyword(s):  
Soft Tissue ◽  
Upper Limb ◽  
Lower Limb ◽  
Chronic Wounds ◽  
Soft Tissue Coverage ◽  
Form And Function ◽  
Flap Coverage ◽  
Surrounding Environment ◽  
And Function ◽  
Review Current

The lower extremities of the human body are more commonly known as the human legs, incorporating: the foot, the lower or anatomical leg, the thigh and the hip or gluteal region.The human lower limb plays a simpler role than that of the upper limb. Whereas the arm allows interaction of the surrounding environment, the legs’ primary goals are support and to allow upright ambulation. Essentially, this means that reconstruction of the leg is less complex than that required in restoring functionality of the upper limb. In terms of reconstruction, the primary goals are based on the preservation of life and limb, and the restoration of form and function. This paper aims to review current and past thoughts on reconstruction of the lower limb, discussing in particular the options in terms of soft tissue coverage.This paper does not aim to review the emergency management of open fractures, or the therapy alternatives to chronic wounds or malignancies of the lower limb, but purely assess the requirements that should be reviewed on reconstructing a defect of the lower limb.A summary of flap options are considered, with literature support, in regard to donor and recipient region, particularly as flap coverage is regarded as the cornerstone of soft tissue coverage of the lower limb.

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