A low-cost real time virtual system for postural stability assessment at home

•Equilibrium conditions control is very important in the elderly and in many pathologies.•Equilibrium control is commonly evaluated by using a stabilometric platform.•A low-cost virtual stabilometric platform is presented.•Results demonstrate that the virtual stabilometric platform is equivalent to...

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Vydáno v:	Computer methods and programs in biomedicine Ročník 117; číslo 2; s. 322 - 333
Hlavní autoři:	Placidi, Giuseppe, Avola, Danilo, Ferrari, Marco, Iacoviello, Daniela, Petracca, Andrea, Quaresima, Valentina, Spezialetti, Matteo
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	Kidlington Elsevier Ireland Ltd 01.11.2014 Elsevier
Témata:	Actigraphy - instrumentation Actigraphy - methods Adult Applied sciences Artificial intelligence Biological and medical sciences Body model representation Computer science; control theory; systems Computer Systems Computerized, statistical medical data processing and models in biomedicine Equipment Design Equipment Failure Analysis Exact sciences and technology Female Home use medical device Humans Internal Medicine Male Medical computing and teaching Medical sciences Other Pattern recognition. Digital image processing. Computational geometry Postural Balance - physiology Recognition and tracking algorithms Reproducibility of Results Self Care - instrumentation Self Care - methods Sensitivity and Specificity Stabilometric force platform Telemedicine - instrumentation Telemedicine - methods User-Computer Interface Video Recording - instrumentation Video Recording - methods Virtual stability assessment Whole Body Imaging - instrumentation Whole Body Imaging - methods Virtual stability assessment Stabilometric force platform Recognition and tracking algorithms Home use medical device Body model representation Measurement Costs Image processing Video signal Modeling Image reconstruction Posture Sphere Surface reconstruction Telemedicine Systems engineering At home Body Medical application Computer vision Healthy subject Video cameras Calibration Pattern recognition Experimental study Real time Time response Real time system Equilibrium disorder Experimental result Medical device Tridimensional image Data gathering
ISSN:	0169-2607, 1872-7565, 1872-7565
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Popis
Shrnutí:	•Equilibrium conditions control is very important in the elderly and in many pathologies.•Equilibrium control is commonly evaluated by using a stabilometric platform.•A low-cost virtual stabilometric platform is presented.•Results demonstrate that the virtual stabilometric platform is equivalent to a physical one. The degeneration of the balance control system in the elderly and in many pathologies requires measuring the equilibrium conditions very often. In clinical practice, equilibrium control is commonly evaluated by using a force platform (stabilometric platform) in a clinical environment. In this paper, we demonstrate how a simple movement analysis system, based on a 3D video camera and a 3D real time model reconstruction of the human body, can be used to collect information usually recorded by a physical stabilometric platform. The algorithm used to reconstruct the human body model as a set of spheres is described and discussed. Moreover, experimental measurements and comparisons with data collected by a physical stabilometric platform are also reported. The measurements were collected on a set of 6 healthy subjects to whom a change in equilibrium condition was stimulated by performing an equilibrium task. The experimental results showed that more than 95% of data collected by the proposed method were not significantly different from those collected by the classic platform, thus confirming the usefulness of the proposed system. The proposed virtual balance assessment system can be implemented at low cost (about 500$) and, for this reason, can be considered a home use medical device. On the contrary, astabilometric platform has a cost of about 10,000$ and requires periodical calibration. The proposed system does not require periodical calibration, as is necessary for stabilometric force platforms, and it is easy to use. In future, the proposed system with little integration can be used, besides being an emulator of a stabilometric platform, also to recognize and track, in real time, head, legs, arms and trunk, that is to collect information actually obtained by sophisticated optoelectronic systems.
Bibliografie:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Undefined-1 ObjectType-Feature-3 content type line 23
ISSN:	0169-2607 1872-7565 1872-7565
DOI:	10.1016/j.cmpb.2014.06.020