K. Povsic et al., "Breathing Training with Assistance of Laser 3D Measuring System", in Proc. of 2nd Int. Conf. on 3D Body Scanning Technologies, Lugano, Switzerland, 2011, pp. 295-302, http://dx.doi.org/10.15221/11.295.
Breathing Training with Assistance of Laser 3D Measuring System
Klemen POVSIC 1, Matjaz FLEZAR 2, Janez MOZINA 1, Matija JEZERSK 1
1 Universitiy of Ljubljana, Faculty of Mechanical Engineering, Ljubljana, Slovenia;
2 Universitiy Clinic Golnik, Golnik, Slovenia
This paper presents a method for three-dimensional body shape monitoring during breathing in real-time. It is based on the laser multiple-line triangulation principle, where the laser projector illuminates the measured surface with 33 equally spaced light planes. The distorted light pattern is recorded with a camera positioned at an angle towards the measured surface. The surface displacements are displayed with a color palette, which enables the patient to correct respiratory irregularities during the breathing exercises. The system is contactless and operates in high-speed (25 measurements/second) with the measuring range of approximately 400×600×500mm in width, height and depth respectively. The accuracy of the calibrated apparatus is ±0.7mm.
The system can distinguish between different breathing patterns by means of determining the BPI (breathing pattern indicator). The accuracy of the measured volumes of chest wall deformation during breathing was verified with two standard methods of volume measurements. The results of the study show that the 3D measuring system with real-time respiration monitoring has great potential as a diagnostic and training assistance tool when monitoring the breathing pattern and evaluating the BPI, because it offers a simple on-screen graphical communication with the patient.
three dimensional, real time, laser triangulation, breathing training, chest wall motion
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