scholarly journals Clinical motion tracking and motion analysis during ophthalmic surgery using electromagnetic tracking system

2012 ◽  
Author(s):  
M. Ali Nasseri ◽  
E. C. Dean ◽  
Suraj Nair ◽  
Martin Eder ◽  
Alois Knoll ◽  
...  
Keyword(s):  
Motion Analysis ◽  
Motion Tracking ◽  
Tracking System ◽  
Electromagnetic Tracking ◽  
Ophthalmic Surgery ◽  
Electromagnetic Tracking System

Factors Influencing Accuracy of Screw Displacement Axis Detection With a D.C.-Based Electromagnetic Tracking System

1998 ◽  
Vol 120 (3) ◽  
pp. 431-435 ◽  
Author(s):  
M. Bottlang ◽  
J. L. Marsh ◽  
T. D. Brown
Keyword(s):  
Motion Tracking ◽  
Tracking System ◽  
Three Dimensional ◽  
Joint Motion ◽  
Electromagnetic Tracking ◽  
Source Data ◽  
Surgical Setting ◽  
Smoothing Procedure ◽  
Electromagnetic Tracking System ◽  
Single Receiver

Recent technical improvements and cost reductions in electromagnetic motion tracking systems invite their application to motion axis determination in the surgical setting. After evaluation of the accuracy of a state-of-the-art D. C. electromagnetic tracking system, which generates complete three-dimensional kinematic outputs from just a single receiver, we calculated screw displacement axes (SDA’s) from its source data. The accuracy of SDA determination from such source data was evaluated for various rotational increment sizes around a revolute joint. A novel smoothing procedure, customized for this type of source data, was developed, enabling SDA detection from incremental rotations of less than 1 deg, at an accuracy appropriate for intra-operative measurement of human joint motion. Examples of SDA determination are given for motion tracking of a ball joint and of the elbow articulation.

Tracker Modalities for Virtual Environments: A Comparison of Some Performance Characteristics

2002 ◽  
Author(s):  
Roglenda Repp ◽  
Uma Jayaram
Keyword(s):  
Virtual Environments ◽  
Motion Tracking ◽  
Tracking System ◽  
Temporal Stability ◽  
Performance Characteristics ◽  
Electromagnetic Tracking ◽  
Tracking Systems ◽  
Static Distortion ◽  
Electromagnetic Tracking System ◽  
Virtual Reality Application

In this paper the authors present a comparison of some performance characteristics of two motion tracking modalities for use in a virtual environment. Ascension Technology’s Flock of Birds is an electromagnetic tracking system. Intersense’s IS-600 uses a combination of ultrasonic, infrared, and inertial principles. Case studies were performed for both tracking systems to study static distortion, temporal stability, and the effect of metal. The requirements of the virtual reality application would ultimately guide the choice of the tracker modality.

scholarly journals Accuracy and repeatability of wrist joint angles in boxing using an electromagnetic tracking system

2019 ◽  
Vol 23 (1) ◽  
Author(s):  
Ian T. Gatt ◽  
Tom Allen ◽  
Jon Wheat
Keyword(s):  
Wrist Joint ◽  
Tracking System ◽  
Testing Procedure ◽  
Electromagnetic Tracking ◽  
Good Reliability ◽  
Flexion Extension ◽  
In Vivo Testing ◽  
Accuracy And Repeatability ◽  
Electromagnetic Tracking System

AbstractThe hand-wrist region is reported as the most common injury site in boxing. Boxers are at risk due to the amount of wrist motions when impacting training equipment or their opponents, yet we know relatively little about these motions. This paper describes a new method for quantifying wrist motion in boxing using an electromagnetic tracking system. Surrogate testing procedure utilising a polyamide hand and forearm shape, and in vivo testing procedure utilising 29 elite boxers, were used to assess the accuracy and repeatability of the system. 2D kinematic analysis was used to calculate wrist angles using photogrammetry, whilst the data from the electromagnetic tracking system was processed with visual 3D software. The electromagnetic tracking system agreed with the video-based system (paired t tests) in both the surrogate (< 0.2°) and quasi-static testing (< 6°). Both systems showed a good intraclass coefficient of reliability (ICCs > 0.9). In the punch testing, for both repeated jab and hook shots, the electromagnetic tracking system showed good reliability (ICCs > 0.8) and substantial reliability (ICCs > 0.6) for flexion–extension and radial-ulnar deviation angles, respectively. The results indicate that wrist kinematics during punching activities can be measured using an electromagnetic tracking system.

Electromagnetic tracking system for minimal invasive interventions using a C-arm system with CT option: first clinical results

2008 ◽  
Author(s):  
Markus Nagel ◽  
Martin Hoheisel ◽  
Ulrich Bill ◽  
Klaus Klingenbeck-Regn ◽  
Willi A. Kalender ◽  
...  
Keyword(s):  
Tracking System ◽  
Clinical Results ◽  
Minimal Invasive ◽  
Electromagnetic Tracking ◽  
Electromagnetic Tracking System

scholarly journals Variation in the Cervical Range of Motion Over Time Measured by the “Flock of Birds” Electromagnetic Tracking System

Spine ◽  
2005 ◽  
Vol 30 (6) ◽  
pp. 650-654 ◽  
Author(s):  
Gert J.D. Bergman ◽  
Bianca Knoester ◽  
Nienke Assink ◽  
Pieter U. Dijkstra ◽  
Jan C. Winters
Keyword(s):  
Range Of Motion ◽  
Tracking System ◽  
Electromagnetic Tracking ◽  
Cervical Range Of Motion ◽  
Electromagnetic Tracking System ◽  
Over Time

Development and performance evaluation of an electromagnetic tracking system for surgery navigation

Measurement ◽  
2019 ◽  
Vol 148 ◽  
pp. 106916 ◽  
Author(s):  
Gregorio Andria ◽  
Filippo Attivissimo ◽  
Attilio Di Nisio ◽  
Anna Maria Lucia Lanzolla ◽  
Pietro Larizza ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Tracking System ◽  
Electromagnetic Tracking ◽  
And Performance ◽  
Electromagnetic Tracking System
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