AN APPLICATION OF KINECT DEPTH SENSOR FOR SCOLIOSIS AND KYPHOSIS SCREENING
Modern technologies for evaluation of spinal deformities are based on assessment of the surface geometry of the torso in different ways. 3D scanning and 3D reconstruction using low cost Kinect sensor can contribute in rapid and low cost elaboration of a 3
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Faculty of Medical Bioengineering, “Grigore T. Popa” University of Medicine and Pharmacy, Iasi, Romania [email protected] 2 Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi” Technical University of Iasi, Iasi, Romania [email protected]
Abstract. Modern technologies for evaluation of spinal deformities are based on assessment of the surface geometry of the torso in different ways. 3D scanning and 3D reconstruction using low cost Kinect sensor can contribute in rapid and low cost elaboration of a 3D mesh of the patient’s back. This paper describes the instrumentation, technique and the results of a Kinect based system for screening of scoliosis and kyphosis. The system proposed in this investigation uses infrared ray technology to evaluate the torso surface of patients. This work discusses the advantages and limitations of the proposed scanning system. Experimental results demonstrated that the low-cost depth sensors can produce accurate 3D models when combined with specialized software. Due to numerous transducers, the Kinect sensor may be used in a lot of medical bioengineering applications. Keywords: 3D scanning, Kinect, scoliosis, kyphosis
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Introduction
Structured light devices, laser scanning devices and other optical sensors have been proposed in the past in order to transform real-world objects into virtual models quickly and cost effectively. The structured light scanning technique is one of the most cost-effective solutions for the 3D scanning of anatomic surfaces of human bodies and of small objects. The main advantages of depth sensors based on structured light (Asus Xtion, Kinect, Argos 3D, etc.) is that the devices can contribute in noninvasive and mainly low cost elaboration of 3D meshes of the anatomic surfaces of patients. This is important in the case of common musculoskeletal disorders such as scoliosis and kyphosis. These medical conditions are connected to body posture. The Kinect device was produced as a multisensory peripheral for Microsoft Xbox gaming console. This sensor is used for measuring the three-dimensional coordinates of the infrared points projected onto surfaces. The depth camera © Springer Nature Singapore Pte Ltd. 2017 A. Badnjevic (ed.), CMBEBIH 2017, IFMBE Proceedings 62, DOI: 10.1007/978-981-10-4166-2_107
system processes in real time the data of point clouds computing coordinates in order to reconstruct the 3D model of the target object. The Kinect depth sensor allows the users to make scans around any object at 0.3 and 1 meter distance between user and object. The objective of this paper is to study the applicability of the Kinect based 3D scans in the case of human anatomic surfaces of the torso. Another objective is to evaluate the spine curvatures projected on the sagittal (lateral) plane and in coronal (frontal) plane by noninvasive 3D graphic estimations in kyphosis and scoliosis patients. This work also discusses the advantages and limitations of the proposed scanning system. The examination of kyphosis and scoliosis with diff
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