Advantages and Limitations of Prospective Head Motion Compensation for MRI Using an Optical Motion Tracking Device

2006 ◽  
Vol 13 (9) ◽  
pp. 1093-1103 ◽  
Author(s):  
Christian Dold ◽  
Maxim Zaitsev ◽  
Oliver Speck ◽  
Evelyn A. Firle ◽  
Jürgen Hennig ◽  
...  
Keyword(s):  
Motion Compensation ◽  
Motion Tracking ◽  
Head Motion ◽  
Optical Motion ◽  
Optical Motion Tracking ◽  
Tracking Device

Monitoring of earthquake induced motions and damage with optical motion tracking

2005 ◽  
Vol 14 (3) ◽  
pp. S32-S38 ◽  
Author(s):  
Katsuhisa Kanda ◽  
Yuji Miyamoto ◽  
Akihiro Kondo ◽  
Makoto Oshio
Keyword(s):  
Motion Tracking ◽  
Optical Motion ◽  
Optical Motion Tracking

scholarly journals Precision, repeatability and accuracy of Optotrak® optical motion tracking systems

2016 ◽  
Author(s):  
Jill Schmidt ◽  
Devin R. Berg
Keyword(s):  
Rigid Body ◽  
Motion Tracking ◽  
Surgical Navigation ◽  
Plane Motion ◽  
Human Motion ◽  
Tracking Systems ◽  
Total Displacement ◽  
Camera Systems ◽  
Optical Motion ◽  
Optical Motion Tracking

In the field of biomechanics, optical motion tracking systems are commonly used to record human motion and assist in surgical navigation. Recently, motion tracking systems have been used to track implant and bone motion on a micron-level. The present study evaluated four different Optotrak® motion tracking systems to determine the precision, repeatability and accuracy under static testing conditions. The distance between the camera systems and the rigid body, as well as the tilt angle of the rigid body, did affect the resulting precision, repeatability and accuracy of the camera systems. The precision and repeatability, calculated as the within-trial and between-trial standard deviations, respectively, were less than 30 µm; with some configurations producing precision and repeatability less than 1 µm. The accuracy was less than 0.53% of the total displacement for the in-plane motion and less than 1.56% of the total displacement for the out-of-plane motion.

scholarly journals A Low-Cost Motion Capture System for Small-Scale Wave Energy Device Tank Testing

2018 ◽  
Vol 141 (3) ◽  
Author(s):  
Francesco Paparella ◽  
Satja Sivcev ◽  
Daniel Toal ◽  
John V. Ringwood
Keyword(s):  
Wave Energy ◽  
Motion Tracking ◽  
Tracking System ◽  
Low Cost ◽  
Measurement Unit ◽  
Small Scale ◽  
Energy Device ◽  
Optical Motion ◽  
Optical Motion Tracking ◽  
Motion Tracking System

The measurement of the motion of a small-scale wave energy device during wave tank tests is important for the evaluation of its response to waves and the assessment of power production. Usually, the motion of a small-scale wave energy converter (WEC) is measured using an optical motion tracking system with high precision and sampling rate. However, the cost for an optical motion tracking system can be considerably high and, therefore, the overall cost for tank testing is increased. This paper proposes a low-cost capture system composed of an inertial measurement unit and ultrasound sensors. The measurements from the ultrasound sensors are combined optimally with the measurements from the inertial measurement unit through an extended Kalman filter (EKF) in order to obtain an accurate estimation of the motion of a WEC.

scholarly journals Tracking and characterizing the head motion of unanaesthetized rats in positron emission tomography

2012 ◽  
Vol 9 (76) ◽  
pp. 3094-3107 ◽  
Author(s):  
Andre Kyme ◽  
Steven Meikle ◽  
Clive Baldock ◽  
Roger Fulton
Keyword(s):  
Positron Emission Tomography ◽  
Motion Tracking ◽  
Emission Tomography ◽  
Head Motion ◽  
Published Data ◽  
Freely Moving Rats ◽  
Positron Emission ◽  
Optical Motion ◽  
Freely Moving

Positron emission tomography (PET) is an important in vivo molecular imaging technique for translational research. Imaging unanaesthetized rats using motion-compensated PET avoids the confounding impact of anaesthetic drugs and enables animals to be imaged during normal or evoked behaviour. However, there is little published data on the nature of rat head motion to inform the design of suitable marker-based motion-tracking set-ups for brain imaging—specifically, set-ups that afford close to uninterrupted tracking. We performed a systematic study of rat head motion parameters for unanaesthetized tube-bound and freely moving rats with a view to designing suitable motion-tracking set-ups in each case. For tube-bound rats, using a single appropriately placed binocular tracker, uninterrupted tracking was possible greater than 95 per cent of the time. For freely moving rats, simulations and measurements of a live subject indicated that two opposed binocular trackers are sufficient (less than 10% interruption to tracking) for a wide variety of behaviour types. We conclude that reliable tracking of head pose can be achieved with marker-based optical-motion-tracking systems for both tube-bound and freely moving rats undergoing PET studies without sedation.

scholarly journals Accuracy of an electrogoniometer relative to optical motion tracking for quantifying wrist range of motion

2020 ◽  
Vol 44 (2) ◽  
pp. 49-54 ◽  
Author(s):  
Brian P. McHugh ◽  
Amy M. Morton ◽  
Bardiya Akhbari ◽  
Janine Molino ◽  
Joseph J. Crisco
Keyword(s):  
Range Of Motion ◽  
Motion Tracking ◽  
Optical Motion ◽  
Optical Motion Tracking
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