QUANTITATIVE ASSESSMENT OF SOFT TISSUE ARTEFACT PROPAGATION TO THE MARKER CLUSTER LEVEL

2012 ◽  
Vol 45 ◽  
pp. S296 ◽  
Author(s):  
Eleni Grimpampi ◽  
Valentina Camomilla ◽  
Andrea Cereatti ◽  
Aurelio Cappozzo
Keyword(s):  
Soft Tissue ◽  
Quantitative Assessment ◽  
Marker Cluster ◽  
Cluster Level

scholarly journals Assessment of the lower limb soft tissue artefact at marker-cluster level with a high-density marker set during walking

2017 ◽  
Vol 62 ◽  
pp. 21-26 ◽  
Author(s):  
Arnaud Barré ◽  
Rachid Aissaoui ◽  
Kamiar Aminian ◽  
Raphaël Dumas
Keyword(s):  
Soft Tissue ◽  
Lower Limb ◽  
High Density ◽  
Marker Cluster ◽  
Cluster Level ◽  
Density Marker

Effects of soft tissue artefacts on computed segmental and stifle kinematics in canine motion analysis

2019 ◽  
Vol 186 (2) ◽  
pp. 66-66 ◽  
Author(s):  
Ming Lu ◽  
Cheng-Chung Lin ◽  
Tung-Wu Lu ◽  
Shi-Nuan Wang ◽  
Ching-Ho Wu
Keyword(s):  
Soft Tissue ◽  
Motion Analysis ◽  
Soft Tissues ◽  
Functional Performance ◽  
Frontal Plane ◽  
Skin Marker ◽  
Attachment Sites ◽  
Mixed Breed ◽  
Dynamic Gait ◽  
Cluster Level

Skin marker-based motion analysis has been widely used to evaluate the functional performance of canine gait and posture. However, the interference of soft tissues between markers and the underlying bones (soft tissue artefacts, STAs) may lead to errors in kinematics measurements. Currently, no optimal marker attachment sites and cluster compositions are recommended for canine gait analysis. The current study aims to evaluate cluster-level STAs and the effects of cluster compositions on the computed stifle kinematics. Ten mixed-breed healthy dogs affixed with 19 retroreflective markers on the thigh and shank were enrolled. During isolated stifle passive extension, the marker trajectories were acquired with a motion capture system, and the skeletal poses were determined by integrating fluoroscopic and CT images of the bones. The cluster-level STAs were assessed, and clusters were paired to calculate the stifle kinematics. A selection of cluster compositions was useful for deriving accurate sagittal and frontal plane stifle kinematics with flexion angles below 50 per cent of the range of motion. The findings contribute to improved knowledge of canine STAs and their influence on motion measurements. The marker composition with the smallest error in describing joint kinematics is recommended for future applications and study in dogs during dynamic gait assessment.

Quantitative assessment of variables that influence soft-tissue electrovaporization in a fluid environment

Urology ◽  
1997 ◽  
Vol 49 (6) ◽  
pp. 851-856 ◽  
Author(s):  
Lisa M. Lim ◽  
Anup Patel ◽  
Thomas P. Ryan ◽  
Patricia L. Stranahan ◽  
Gerhard J. Fuchs
Keyword(s):  
Soft Tissue ◽  
Quantitative Assessment ◽  
Fluid Environment

Qualitative and Quantitative Assessment of Soft Tissue Damage in the Cervical Spine following a Unilateral Facet Injury

2011 ◽  
Vol 11 (10) ◽  
pp. S40-S41
Author(s):  
Melissa Nadeau ◽  
Stewart McLachlin ◽  
Stewart Bailey ◽  
Kevin R. Gurr ◽  
Cynthia Dunning ◽  
...  
Keyword(s):  
Cervical Spine ◽  
Soft Tissue ◽  
Tissue Damage ◽  
Quantitative Assessment ◽  
Soft Tissue Damage ◽  
Qualitative And Quantitative

Quantitative Assessment of Normal Soft-Tissue Elasticity Using Shear-Wave Ultrasound Elastography

2011 ◽  
Vol 197 (3) ◽  
pp. 532-536 ◽  
Author(s):  
Kemal Arda ◽  
Nazan Ciledag ◽  
Elif Aktas ◽  
Bilgin Kadri Arıbas ◽  
Kenan Köse
Keyword(s):  
Soft Tissue ◽  
Shear Wave ◽  
Quantitative Assessment ◽  
Ultrasound Elastography ◽  
Tissue Elasticity

Premolar autotransplantation in juvenile dentition: quantitative assessment of vertical bone and soft tissue growth

2017 ◽  
Vol 124 (1) ◽  
pp. e1-e12 ◽  
Author(s):  
Inessa Michl ◽  
Dirk Nolte ◽  
Claudia Tschammler ◽  
Martin Kunkel ◽  
Robert Linsenmann ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Quantitative Assessment ◽  
Tissue Growth

scholarly journals Model of Soft Tissue Artifact Propagation to Joint Angles in Human Movement Analysis

2014 ◽  
Vol 136 (3) ◽  
Author(s):  
Álvaro Page ◽  
Helios de Rosario ◽  
Vicente Mata ◽  
Antonio Besa
Keyword(s):  
Soft Tissue ◽  
Movement Analysis ◽  
Euler Angle ◽  
Human Movement ◽  
Rotation Vector ◽  
Joint Angles ◽  
Human Movements ◽  
Free Gold ◽  
Marker Cluster ◽  
Soft Tissue Artifact

This work describes the kinematic laws that govern the transmission of soft tissue artifact errors to kinematic variables in the analysis of human movements. Artifacts are described as relative translations and rotations of the marker cluster over the bone, and a set of explicit expressions is defined to account for the effect of that relative motion on different representations of rotations: the rotation around the screw axis, or rotation vector, and three Euler angle sequences (XY′Z, YX′Y″, ZX′Y″). Although the error transmission is nonlinear in all cases, the effect of artifacts is greater on Euler sequences than on the rotation vector. Specifically, there are crosstalk effects in Euler sequences that amplify the errors near singular configurations. This fact is an additional source of variability in studies that describe artifacts by comparing the Euler angles obtained from skin markers, with the angles of an artifact-free gold standard. The transmission of errors to rotation vector coordinates is less variable or dependent on the type of motion. This model has been tested in an experiment with a deformable mechanical model with a spherical joint.

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