Szerző szerinti böngészés "Kiss, Rita M."

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    Application of OptiTrack motion capture systems in human movement analysis A systematic literature review
    (DUPress, 2018-07-02) Nagymáté, Gergely; Kiss, Rita M.
    With the spreading of motion analysis decisions to invest into a new system demand scientific reference applications. The aim of the present systematic review is to reveal the biomechanical scientific applications of OptiTrack motion capture systems and to overview documented usage conditions and purposes. Six major scientific literature databases were used (PubMed, PubMed Central, ScienceDirect, IEEE Xplore, PLOS and Web Of Science). An OptiTrack camera system had to be used for human or biologically related motion capture. A total of 85 articles were included, 4 out of which dealt with the validation of OptiTrack systems and 81 utilized the system for biomechanical analyses. The data analysed and extracted from the system validation studies included: description of the validated and the reference system, measured features and observed errors. The data extracted from the utilizing studies also included: OptiTrack application, camera type and frequency, marker size, camera number, data processing software and the motion studied. The review offers a broad collection of biomechanical applications of OptiTrack motion capture systems as scientific references for certain motion studies. The review also summarizes findings on the accuracy of the systems. It concludes that the method descriptions of system usage are often underspecified
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    Directional ratio: a proposed new variable of dynamic balance regain
    (DUPress, 2016-12-15) Petró, Bálint; Kiss, Rita M.
    The use of a free oscillating platform for balance training is widespread. However, there is a lack of variables used when analyzing these measurement results. The aim of this study was to introduce and evaluate a new variable. The directional ratio is the ratio of total length of oscillation travelled in the direction parallel and perpendicular to perturbation, respectively. 21 adult figure skaters (m. age 28) participated in balance regain tests, adopting two-legged and one-legged stances on each leg on the PosturoMed platform (Haider Bioswing, Weiden, Germany) with a medial-lateral perturbation. Overall the directional ratio showed weak correlation with the damping ratio (r = -0.05) and the time of balance regain (r = -0.08), suggesting new information content. One-legged stances had significantly lower damping ratio (p = 0.013) and directional ratio values (p < 0.00), showing more anterior-posterior movement and elliptical trajectories. Using the damping and directional ratios together, balance regain can be better characterized in the future.
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    Reconstruction of human thorax from CT images
    (DUPress, 2017-01-23) Fink, Nándor; Pammer, Dávid; Barsi, Árpád; Kiss, Rita M.
    3D printing, as a rapid prototyping method is become more common nowadays world widely, including medicine too. The purpose of this article is to reveal the potential of using 3D printing in medicine, especially with a specific example of making a human thorax model from the very beginning of imaging diagnose to the physical model. There will be shown in details how the model of bones, lungs and heart had been created. The circumstances of the 3D printing will be discussed too.