The fusion of motion capture and 3D medical imaging for marker misplacements correction – a preliminary study

2019 ◽  
Vol 73 ◽  
pp. 572-573
Keyword(s):  
Medical Imaging ◽  
Motion Capture ◽  
Preliminary Study

scholarly journals Biomechanical Role and Motion Contribution of Ligaments and Bony Constraints in the Elbow Stability: A Preliminary Study

2019 ◽  
Vol 6 (3) ◽  
pp. 68 ◽  
Author(s):  
Elisa Panero ◽  
Laura Gastaldi ◽  
Mara Terzini ◽  
Cristina Bignardi ◽  
Arman Sard ◽  
...  
Keyword(s):  
Motion Capture ◽  
Elbow Joint ◽  
Large Deflection ◽  
Elbow Flexion ◽  
Elbow Instability ◽  
Joint Stability ◽  
Coronoid Fracture ◽  
Flexion Extension ◽  
Preliminary Study ◽  
Functional Investigation

In flexion–extension motion, the interaction of several ligaments and bones characterizes the elbow joint stability. The aim of this preliminary study was to quantify the relative motion of the ulna with respect to the humerus in two human upper limbs specimens and to investigate the constraints role for maintaining the elbow joint stability in different section conditions. Two clusters of four markers were fixed respectively to the ulna and humerus, and their trajectory was recorded by a motion capture system during functional orthopedic maneuver. Considering the posterior bundle of medial collateral complex (pMUCL) and the coronoid, two section sequences were executed. The orthopedic maneuver of compression, pronation and varus force was repeated at 30°, 60° and 90° flexion for the functional investigation of constraints. Ulna deflection was compared to a baseline elbow flexion condition. With respect to the intact elbow, the coronoid osteotomy influences the elbow stability at 90° (deflection = 11.49 ± 17.39 mm), while small differences occur at 30° and 60°, due to ligaments constraint. The contemporary pMUCL section and coronoid osteotomy causes elbow instability, with large deflection at 30° (deflection = 34.40 ± 9.10 mm), 60° (deflection = 45.41 ± 18.47 mm) and 90° (deflection = 52.16 ± 21.92 mm). Surgeons may consider the pMUCL reconstruction in case of unfixable coronoid fracture.

scholarly journals Design of a Novel Wearable System for Foot Clearance Estimation

Sensors ◽  
2021 ◽  
Vol 21 (23) ◽  
pp. 7891
Author(s):  
Shilpa Jacob ◽  
Geoff Fernie ◽  
Atena Roshan Fekr
Keyword(s):  
Motion Capture ◽  
Small Scale ◽  
Wearable System ◽  
Gait Parameters ◽  
Foot Clearance ◽  
Preliminary Study ◽  
Offset Compensation ◽  
Walking Speeds ◽  
Future Work ◽  
Healthy Females

Trip-related falls are one of the major causes of injury among seniors in Canada and can be attributable to an inadequate Minimum Toe Clearance (MTC). Currently, motion capture systems are the gold standard for measuring MTC; however, they are expensive and have a restricted operating area. In this paper, a novel wearable system is proposed that can estimate different foot clearance parameters accurately using only two Time-of-Flight (ToF) sensors located at the toe and heel of the shoe. A small-scale preliminary study was conducted to investigate the feasibility of foot clearance estimation using the proposed wearable system. We recruited ten young, healthy females to walk at three self-selected speeds (normal, slow, and fast) while wearing the system. Our data analysis showed an average correlation coefficient of 0.94, 0.94, 0.92 for the normal, slow, and fast speed, respectively, when comparing the ToF signals with motion capture. The ANOVA analysis confirmed these results further by revealing no statistically significant differences between the ToF signals and motion capture data for most of the gait parameters after applying the newly proposed foot angle and offset compensation. In addition, the proposed system can measure the MTC with an average Mean Error (ME) of −0.08 ± 3.69 mm, −0.12 ± 4.25 mm, and −0.10 ± 6.57 mm for normal, slow, and fast walking speeds, respectively. The proposed affordable wearable system has the potential to perform real-time MTC estimation and contribute to future work focused on minimizing tripping risks.

scholarly journals Jumping Side Volley in Soccer – A Biomechanical Preliminary Study on the Flying Kick and Its Coaching Know-How for Practitioners

2020 ◽  
Author(s):  
Xiang Zhang ◽  
Gongbing Shan ◽  
Feng Liu ◽  
Yaguang Yu
Keyword(s):  
Motion Capture ◽  
Learning Strategy ◽  
Biomechanical Modeling ◽  
Trunk Rotation ◽  
Know How ◽  
Risk Of Injury ◽  
Preliminary Study ◽  
3D Motion Capture ◽  
Ball Motion ◽  
Full Body

Jumping side volley has created breathtaking moments and cherished memories for us. Regrettably, a scientific study on the skill has not been found in literature. Relying on talent of athletes to improvise on the fly can hardly be considered a viable learning strategy. This study targets to fill the gap by quantifying factors contributing to develop its coaching method. Using 3D motion capture (12-cameras, 200Hz) and full-body biomechanical modeling, our study aimed to identify elements that govern entrainment of the skill by examining jumping, kicking and falling phases of its execution. Given the rarity of players who have acquired this skill, we found five subjects for the study. Twenty-three trials were captured and quantified. The results unveil the following key elements: 1) the control of trunk rotation during the jumping, 2) the angle between thighs upon take-off, 3) the whip-like control of the kicking leg during airborne, 4) timing between ball motion and limbs’ coordination, and 5) damping mechanism during falling. An accurate kick can only be achieved through repetitive training. This underlines the need for athletes to master a safe landing technique that minimizes risk of injury during practice. Therefore, training should begin with learning a safe falling technique.

scholarly journals Can the fusion of motion capture and 3D medical imaging reduce the extrinsic variability due to marker misplacements?

PLoS ONE ◽  
2020 ◽  
Vol 15 (1) ◽  
pp. e0226648
Author(s):  
Xavier Gasparutto ◽  
Jennifer Wegrzyk ◽  
Kevin Rose-Dulcina ◽  
Didier Hannouche ◽  
Stéphane Armand
Keyword(s):  
Medical Imaging ◽  
Motion Capture

Attitudes among Medical Imaging Students towards older adults in Malaysia: A Preliminary Study

2016 ◽  
Vol 1 (3) ◽  
Author(s):  
Farahnaz Ahmad Anwar Bashah ◽  
Mohd Zulhilmi Mohd Nordin
Keyword(s):  
Medical Imaging ◽  
Older People ◽  
Positive Attitude ◽  
Publishing House ◽  
Essential Element ◽  
Quality Patient Care ◽  
International Publishing ◽  
Preliminary Study ◽  
Students Attitudes ◽  
Self Administered Questionnaire

A positive attitude is an essential element towards delivering a high-quality patient care for older people. A consequence of aging population in Malaysia is that Medical imaging students are increasingly exposed to older people during their clinical attachments and importantly as a graduated technologist. This study attempted to determine the Medical Imaging students' attitudes towards elderly in Malaysia based on 5 selective characteristics. This study employed a self-administered questionnaire involving 283 students. The finding revealed that well exposed and good result students' have a better attitude towards elderly. This study suggested relevant educational intervention and community engagement program.© 2016. The Authors. Published for AMER ABRA by e-International Publishing House, Ltd., UK. Peer–review under responsibility of AMER (Association of Malaysian Environment-Behaviour Researchers), ABRA (Association of Behavioural Researchers on Asians) and cE-Bs (Centre for Environment-Behaviour Studies, Faculty of Architecture, Planning & Surveying, Universiti Teknologi MARA, Malaysia.Keywords: Elderly People;Medical Imaging;Attitudes;Kogan Attitude’s Scale 

scholarly journals Trajectory Generation from Motion Capture for a Planar Biped Robot in Swing Phase

2015 ◽  
Vol 11 (22) ◽  
pp. 25-47 ◽  
Author(s):  
Diego A. Bravo M. ◽  
Carlos F. Rengifo R.
Keyword(s):  
Motion Capture ◽  
Biped Robot ◽  
Swing Phase ◽  
Human Motion ◽  
Torque Control ◽  
Hybrid Strategy ◽  
Time Scaling ◽  
Preliminary Study ◽  
Reference Trajectories ◽  
Computed Torque

This paper proposes human motion capture to generate movements for theright leg in swing phase of a biped robot restricted to the sagittal plane.Such movements are defined by time functions representing the desiredangular positions for the joints involved. Motion capture performed witha Microsoft KinectTMcamera and from the data obtained joint trajec-tories were generated to control the robot’s right leg in swing phase. Theproposed control law is a hybrid strategy; the first strategyis based ona computed torque control to track reference trajectories,and the secondstrategy is based on time scaling control ensuring the robot’s balance. Thiswork is a preliminary study to generate humanoid robot trajectories frommotion capture.

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