Calibration of the “Flock of Birds” electromagnetic tracking device and its application in shoulder motion studies

1999 ◽  
Vol 32 (6) ◽  
pp. 629-633 ◽  
Author(s):  
C.G.M. Meskers ◽  
H. Fraterman ◽  
F.C.T. van der Helm ◽  
H.M. Vermeulen ◽  
P.M. Rozing
Keyword(s):  
Electromagnetic Tracking ◽  
Shoulder Motion ◽  
Motion Studies ◽  
Tracking Device

Measurement of spinal range of motion in healthy individuals using an electromagnetic tracking device

2008 ◽  
Vol 8 (2) ◽  
pp. 135-142 ◽  
Author(s):  
Chien-Jen Hsu ◽  
Yi-Wen Chang ◽  
Wen-Ying Chou ◽  
Chou-Ping Chiou ◽  
Wei-Ning Chang ◽  
...  
Keyword(s):  
Lumbar Spine ◽  
Range Of Motion ◽  
Thoracic Spine ◽  
Axial Rotation ◽  
Electromagnetic Tracking ◽  
Healthy Individuals ◽  
Hip Joints ◽  
Forward Bending ◽  
Tracking Device ◽  
Side Bending

Object The authors measured the range of motion (ROM) of the spine in healthy individuals by using an electromagnetic tracking device to evaluate the functional performance of the spine. Methods The authors used the Flock of Birds electromagnetic tracking device with 4 receiver units attached to C-7, T-12, S-1, and the midthigh region. Forward/backward bending, bilateral side bending, and axial rotation of the trunk were performed in 18 healthy individuals. Results The average ROM was calculated after 3 consecutive measurements. The thoracic spine generated the greatest angle in axial rotation and smallest angle in backward bending. The lumbar spine generated the greatest angle in forward bending and smallest angle in axial rotation. The hip joints generated the greatest angle in forward bending and smallest angle in backward bending. Additionally, 40% of forward-bending motion occurred in the lumbar spine and 40% occurred in the hip joints. Approximately 60% of backward bending occurred in the lumbar spine; 60% of axial rotation occurred in the thoracic spine; and 45% of side bending occurred in the thoracic spine. Conclusions The Flock of Birds electromagnetic tracking device cannot only measure the ROM of spine but also easily differentiate the 6-degree contributions by different segments.

Determining Dual Euler Angles of the Ankle Complex in vivo Using “Flock of Birds” Electromagnetic Tracking Device

2005 ◽  
Vol 127 (1) ◽  
pp. 98-107 ◽  
Author(s):  
Ning Ying ◽  
Wangdo Kim
Keyword(s):  
Three Dimensional ◽  
Euler Angles ◽  
Joint Motion ◽  
Electromagnetic Tracking ◽  
Kinematic Coupling ◽  
Alternative Approach ◽  
Ankle Complex ◽  
Coupling Characteristics ◽  
Tracking Device

The dual Euler angles method has been proposed as an alternative approach to describe the general spatial human joint motion. In this study, the dual Euler angles method was applied to study the three-dimensional motion of the ankle complex. The methodology for obtaining dual Euler angles of the ankle complex was developed by using a “Flock of Birds” electromagnetic tracking device. The repeatability of the methodology was studied based on the intertester and intratester variability analysis. Finally kinematic coupling characteristics of the ankle complex during dorsiflexion–plantarflexion, eversion–inversion, and abduction–adduction were analyzed according to the parameters of the dual Euler angles.

The accuracy of joint surface models constructed from data obtained with an electromagnetic tracking device

2000 ◽  
Vol 33 (8) ◽  
pp. 1023-1028 ◽  
Author(s):  
L.J van Ruijven ◽  
M Beek ◽  
E Donker ◽  
T.M.G.J van Eijden
Keyword(s):  
Joint Surface ◽  
Electromagnetic Tracking ◽  
Surface Models ◽  
Tracking Device

Validation for tremor quantification of an electromagnetic tracking device

2001 ◽  
Vol 16 (2) ◽  
pp. 265-271 ◽  
Author(s):  
Padraig E. O'Suilleabhain ◽  
Richard B. Dewey
Keyword(s):  
Electromagnetic Tracking ◽  
Tracking Device
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