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Marcin Derlatka, Mariusz Bogdan
Biometrics is currently an area that is both very interesting as well as rapidly growing. Among various types of biometrics the human gait recognition seems to be one of the most intriguing. However, one of the greatest problems within this field of biometrics is the change in gait caused by footwear. A change of shoes results in a significant lowering of accuracy in recognition of people. The following work presents a method which uses data gathered by two sensors: force plates and Microsoft Kinect v2 to reduce this problem...
May 21, 2018: Sensors
Ryo Tanaka, Takuya Kubota, Takahiro Yamasaki, Ariaki Higashi
PURPOSE: The purpose of this study was to examine the validity of total body centre of gravity (COG) measurement during gait with markerless motion capture system (MLS) on the basis of values acquired with a marker-based motion capture system (MBS). MATERIALS AND METHODS: Thirty young healthy subjects walked on a flat surface as coordinate data from their bodies were acquired using the Kinect v2 (as a MLS) and Vicon systems (as a MBS). COG was calculated using coordinate data of the total body...
May 30, 2018: Journal of Medical Engineering & Technology
Manola Ricciuti, Susanna Spinsante, Ennio Gambi
Fall detection is one of the most investigated themes in the research on assistive solutions for aged people. In particular, a false-alarm-free discrimination between falls and non-falls is indispensable, especially to assist elderly people living alone. Current technological solutions designed to monitor several types of activities in indoor environments can guarantee absolute privacy to the people that decide to rely on them. Devices integrating RGB and depth cameras, such as the Microsoft Kinect, can ensure privacy and anonymity, since the depth information is considered to extract only meaningful information from video streams...
May 29, 2018: Sensors
Miso Ju, Younchang Choi, Jihyun Seo, Jaewon Sa, Sungju Lee, Yongwha Chung, Daihee Park
Segmenting touching-pigs in real-time is an important issue for surveillance cameras intended for the 24-h tracking of individual pigs. However, methods to do so have not yet been reported. We particularly focus on the segmentation of touching-pigs in a crowded pig room with low-contrast images obtained using a Kinect depth sensor. We reduce the execution time by combining object detection techniques based on a convolutional neural network (CNN) with image processing techniques instead of applying time-consuming operations, such as optimization-based segmentation...
May 29, 2018: Sensors
Zaki Hasnain, Ming Li, Tanya Dorff, David Quinn, Naoto T Ueno, Sriram Yennu, Anand Kolatkar, Cyrus Shahabi, Luciano Nocera, Jorge Nieva, Peter Kuhn, Paul K Newton
BACKGROUND: Biomechanical characterization of human performance with respect to fatigue and fitness is relevant in many settings, however is usually limited to either fully qualitative assessments or invasive methods which require a significant experimental setup consisting of numerous sensors, force plates, and motion detectors. Qualitative assessments are difficult to standardize due to their intrinsic subjective nature, on the other hand, invasive methods provide reliable metrics but are not feasible for large scale applications...
May 18, 2018: Clinical Biomechanics
Yuanyuan Feng, Hannah McGowan, Azin Semsar, Hamid R Zahiri, Ivan M George, Timothy Turner, Adrian Park, Andrea Kleinsmith, Helena M Mentis
PURPOSE: To assess a virtual pointer in supporting surgical trainees' development of professional vision in laparoscopic surgery. METHODS: We developed a virtual pointing and telestration system utilizing the Microsoft Kinect movement sensor as an overlay for any imagine system. Training with the application was compared to a standard condition, i.e., verbal instruction with un-mediated gestures, in a laparoscopic training environment. Seven trainees performed four simulated laparoscopic tasks guided by an experienced surgeon as the trainer...
May 23, 2018: International Journal of Computer Assisted Radiology and Surgery
Amin Amini, Konstantinos Banitsas, William R Young
Parkinson's is a neurodegenerative condition associated with several motor symptoms including tremors and slowness of movement. Freezing of gait (FOG); the sensation of one's feet being "glued" to the floor, is one of the most debilitating symptoms associated with advanced Parkinson's. FOG not only contributes to falls and related injuries, but also compromises quality of life as people often avoid engaging in functional daily activities both inside and outside the home. In the current study, we describe a novel system designed to detect FOG and falling in people with Parkinson's (PwP) as well as monitoring and improving their mobility using laser-based visual cues cast by an automated laser system...
May 23, 2018: Disability and Rehabilitation. Assistive Technology
Tsung-Jung Ho, Kuei-Ting Chou, Cheng-Hsuan Li, Bor-Chen Kuo, Tzung-Chi Huang
The quantitative and reproducible analysis of the standard body movement in Tai Chi Chuan (TCC) was performed in this study. We aimed to provide a reference of the upper extremities for standardizing TCC practice. Microsoft Kinect was used to record the motion during the practice of TCC. The preparation form and eight essential forms of TCC performed by an instructor and 101 practitioners were analyzed in this study. The instructor completed an entire TCC practice cycle and performed the cycle 12 times. An entire cycle of TCC was performed by practitioners and images were recorded for statistics analysis...
2018: BioMed Research International
Vahid Soleimani, Majid Mirmehdi, Dima Damen, Massimo Camplani, Sion Hannuna, Charles Sharp, James Dodd
OBJECTIVE: We propose a novel depth-based photoplethysmography (dPPG) approach to reduce motion artifacts in respiratory volume-time data and improve the accuracy of remote pulmonary function testing (PFT) measures. METHOD: Following spatial and temporal calibration of two opposing RGB-D sensors, a dynamic three-dimensional model of the subject performing PFT is reconstructed and used to decouple trunk movements from respiratory motions. Depth-based volume-time data is then retrieved, calibrated, and used to compute 11 clinical PFT measures for forced vital capacity and slow vital capacity spirometry tests...
June 2018: IEEE Transactions on Bio-medical Engineering
Sari Awwad, Sanjay Tarvade, Massimo Piccardi, David J Gattas
Objectives: (i) To demonstrate the feasibility of automated, direct observation and collection of hand hygiene data, (ii) to develop computer visual methods capable of reporting compliance with moment 1 (the performance of hand hygiene before touching a patient) and (iii) to report the diagnostic accuracy of automated, direct observation of moment 1. Design: Observation of simulated hand hygiene encounters between a healthcare worker and a patient. Setting: Computer laboratory in a university...
May 15, 2018: International Journal for Quality in Health Care
Imre Cikajlo, Alma Hukić, Irena Dolinšek, Dejana Zajc, Mateja Vesel, Tatjana Krizmanič, Bojan Blažica, Anton Biasizzo, Franc Novak, Karmen Peterlin Potisk
Parkinson's disease (PD) is treated by medication, less with deep brain stimulation and physiotherapy. Different opinions on the clinical meaningfulness of the physiotherapy or recommended intensive physiotherapy were found. Our objectives were to design intensive target-based physiotherapy for upper extremities suitable for telerehabilitation services and examine the clinical meaningfulness of the exergaming at an unchanged medication plan. A telerehabilitation exergaming system using the Kinect sensor was developed; 28 patients with PD participated in the study...
May 4, 2018: International Journal of Rehabilitation Research. Revue Internationale de Recherches de Réadaptation
Natalia Lopez, Elisa Perez, Emanuel Tello, Alejandro Rodrigo, Max E Valentinuzzi
Background: The rehabilitation process is a fundamental stage for recovery of people's capabilities. However, the evaluation of the process is performed by physiatrists and medical doctors, mostly based on their observations, that is, a subjective appreciation of the patient's evolution. This paper proposes a tracking platform of the movement made by an individual's upper limb using Kinect sensor(s) to be applied for the patient during the rehabilitation process. The main contribution is the development of quantifying software and the statistical validation of its performance, repeatability, and clinical use in the rehabilitation process...
2018: BioMed Research International
Andre Lacerda Braga Teles, Roseane R Silva, Michelle Ko, Glaucio Monteiro Ferreira, Samuel da Rocha Pita, Gustavo Henrique Goulart Trossini, Paulo Carvalho, Marcelo Santos Castilho
Schistosoma mansoni is responsible for virtually all reported cases of schistosomiasis in Latin America and the emergence of praziquantel- and oxaminiquine-resistant strains makes it urgent to develop new schistosomicide agents. Dihydrofolate reductases (DHFR) from bacteria and protozoan parasites are considered validated macromolecular targets for this goal, but S. mansoni DHFR (SmDHFR) has been largely overlooked. To fill this gap in knowledge, the present work describes optimized conditions to carry out thermal shift assays with SmDHFR, as well as a balanced kinetic assay that supports 2,4-diaminopyrimidine derivatives as SmDHFR inhibitors...
May 9, 2018: Current Topics in Medicinal Chemistry
Gerardo Luis Dimaguila, Kathleen Gray, Mark Merolli
BACKGROUND: Person- or patient-generated health data (PGHD) are health, wellness, and clinical data that people generate, record, and analyze for themselves. There is potential for PGHD to improve the efficiency and effectiveness of simulated rehabilitation technologies for stroke. Simulated rehabilitation is a type of telerehabilitation that uses computer technologies and interfaces to allow the real-time simulation of rehabilitation activities or a rehabilitation environment. A leading technology for simulated rehabilitation is Microsoft's Kinect, a video-based technology that uses infrared to track a user's body movements...
May 8, 2018: JMIR Rehabilitation and Assistive Technologies
David Anton, Idoia Berges, Jesús Bermúdez, Alfredo Goñi, Arantza Illarramendi
Telerehabilitation systems that support physical therapy sessions anywhere can help save healthcare costs while also improving the quality of life of the users that need rehabilitation. The main contribution of this paper is to present, as a whole, all the features supported by the innovative Kinect-based Telerehabilitation System (KiReS). In addition to the functionalities provided by current systems, it handles two new ones that could be incorporated into them, in order to give a step forward towards a new generation of telerehabilitation systems...
May 8, 2018: Sensors
Myungsoo Bae, Sangmin Lee, Namkug Kim
BACKGROUND AND OBJECTIVE: To develop and validate a robust and cost-effective 3D respiratory monitoring system based on a Kinect device with a custom-made simple marker. METHODS: A 3D respiratory monitoring system comprising the simple marker and the Microsoft Kinect v2 device was developed. The marker was designed for simple and robust detection, and the tracking algorithm was developed using the depth, RGB, and infra-red images acquired from the Kinect sensor...
July 2018: Computer Methods and Programs in Biomedicine
C P R Maués, M V S Casagrande, R C C Almeida, M A O Almeida, F A R Carvalho
Although there has been an increase in three-dimensional (3D) scanning methods available on the market, they are generally expensive. The DI3D system is considered a good scanner for the acquisition of soft tissue surface images. The Microsoft Kinect scanner is a much more affordable alternative for acquiring 3D models. The aim of this study was to determine whether the precision and accuracy of Kinect are similar to those of DI3D. To verify the accuracy, 10 patients were scanned with both methods The models of each patient acquired from the two scanners were superimposed using a surface-to-surface registration technique, and the distances between the models were recorded for 10 different anatomical regions of interest...
April 25, 2018: International Journal of Oral and Maxillofacial Surgery
Jiaqi Yang, Yang Xiao, Zhiguo Cao
The local reference frame (LRF), as an independent coordinate system constructed on the local 3D surface, is broadly employed in 3D local feature descriptors. The benefits of the LRF include rotational invariance and full 3D spatial information, thereby greatly boosting the distinctiveness of a 3D feature descriptor. There are numerous LRF methods in the literature; however, no comprehensive study comparing their repeatability and robustness performance under different application scenarios and nuisances has been conducted...
August 2018: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
Alessandro Scano, Andrea Chiavenna, Matteo Malosio, Lorenzo Molinari Tosatti, Franco Molteni
Automated procedures for neurological patients' motor evaluation may take advantage of the coupling between clinical scales and motion tracking devices to provide affordable, quantified and reliable assessment to be used in clinics, in surgeries and domestic environment. In this study, 20 post-stroke patients performed frontal reaching movements with their more affected limb, and a physician administered the Reaching Performance Scale (RPS) to assess motor functionality. At the same time, patients' kinematics were recorded with the Kinect V2 sensor...
June 2018: Medical Engineering & Physics
Hugo Miguel Pereira Choupina, Ana Patrícia Rocha, José Maria Fernandes, Christian Vollmar, Soheyl Noachtar, João Paulo Silva Cunha
Epilepsy diagnosis is typically performed through 2Dvideo-EEG monitoring, relying on the viewer's subjective interpretation of the patient's movements of interest. Several attempts at quantifying seizure movements have been performed in the past using 2D marker-based approaches, which have several drawbacks for the clinical routine (e.g. occlusions, lack of precision, and discomfort for the patient). These drawbacks are overcome with a 3D markerless approach. Recently, we published the development of a single-bed 3Dvideo-EEG system using a single RGB-D camera (Kinect v1)...
2018: Studies in Health Technology and Informatics
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