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Journal of Healthcare Engineering

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https://www.readbyqxmd.com/read/30079173/effect-of-dropping-height-on-the-forces-of-lower-extremity-joints-and-muscles-during-landing-a-musculoskeletal-modeling
#1
Wenxin Niu, Lejun Wang, Chenghua Jiang, Ming Zhang
The objective of this study was to investigate the effect of dropping height on the forces of joints and muscles in lower extremities during landing. A total of 10 adult subjects were required to landing from three different heights (32 cm, 52 cm, and 72 cm), and the ground reaction force and kinematics of lower extremities were measured. Then, the experimental data were input into the AnyBody Modeling System, in which software the musculoskeletal system of each subject was modeled. The reverse dynamic analysis was done to calculate the joint and muscle forces for each landing trial, and the effect of dropping-landing on the results was evaluated...
2018: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/30073048/multifeature-quantification-of-nuclear-properties-from-images-of-h-e-stained-biopsy-material-for-investigating-changes-in-nuclear-structure-with-advancing-cin-grade
#2
Christos Konstandinou, Dimitris Glotsos, Spiros Kostopoulos, Ioannis Kalatzis, Panagiota Ravazoula, George Michail, Eleftherios Lavdas, Dionisis Cavouras, George Sakellaropoulos
Background: Cervical dysplasia is a precancerous condition, and if left untreated, it may lead to cervical cancer, which is the second most common cancer in women. The purpose of this study was to investigate differences in nuclear properties of the H&E-stained biopsy material between low CIN and high CIN cases and associate those properties with the CIN grade. Methods: The clinical material comprised hematoxylin and eosin- (H&E-) stained biopsy specimens from lesions of 44 patients diagnosed with cervical intraepithelial neoplasia (CIN)...
2018: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/30073047/direct-parametric-maps-estimation-from-dynamic-pet-data-an-iterated-conditional-modes-approach
#3
Michele Scipioni, Assuero Giorgetti, Daniele Della Latta, Sabrina Fucci, Vincenzo Positano, Luigi Landini, Maria Filomena Santarelli
We propose and test a novel approach for direct parametric image reconstruction of dynamic PET data. We present a theoretical description of the problem of PET direct parametric maps estimation as an inference problem, from a probabilistic point of view, and we derive a simple iterative algorithm, based on the Iterated Conditional Mode (ICM) framework, which exploits the simplicity of a two-step optimization and the efficiency of an analytic method for estimating kinetic parameters from a nonlinear compartmental model...
2018: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/30073046/nddn-a-cloud-based-neuroinformation-database-for-developing-neuronal-networks
#4
Jiangbo Pu, Xiangning Li
Electrical activity of developing dissociated neuronal networks is of immense significance for understanding the general properties of neural information processing and storage. In addition, the complexity and diversity of network activity patterns make them ideal candidates for developing novel computational models and evaluating algorithms. However, there are rare databases which focus on the changing network dynamics during development. Here, we describe the design and implementation of Neuroinformation Database for Developing Networks (NDDN), a repository for electrophysiological data collected from long-term cultured hippocampal networks...
2018: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/30057735/experimental-characterization-of-nurse-a-device-for-arm-motion-guidance
#5
Betsy Dayana Marcela Chaparro-Rico, Daniele Cafolla, Marco Ceccarelli, Eduardo Castillo-Castaneda
This paper presents an experimental characterization of NURSE, a device for arm motion guidance. The laboratory setup and testing modes are presented to explain the experimental procedure. Two exercises for the upper limb exercise are used to test the NURSE behaviour, and successful results are presented. Trajectories and linear accelerations are tested when the device performs the two exercises without and with load. In addition, torque and power consumption are considered to check the NURSE behaviour.
2018: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/30057734/robust-and-fragile-medical-image-watermarking-a-joint-venture-of-coding-and-chaos-theories
#6
Atta Ur Rahman, Kiran Sultan, Dhiaa Musleh, Nahier Aldhafferi, Abdullah Alqahtani, Maqsood Mahmud
A secure spatial domain, hybrid watermarking technique for obtaining watermark (authentication information) robustness and fragility of the host medical image (content integrity) using product codes, chaos theory, and residue number system (RNS) is proposed. The proposed scheme is highly fragile and unrecoverable in terms of the host image, but it is significantly robust and recoverable in terms of the watermark. Altering the medical image may result in misdiagnosis, hence the watermark that may contain patient information and organization logo must be protected against certain attacks...
2018: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/30057733/link-prediction-investigation-of-dynamic-information-flow-in-epilepsy
#7
Yan He, Fan Yang, Yunli Yu, Celso Grebogi
As a brain disorder, epilepsy is characterized with abnormal hypersynchronous neural firings. It is known that seizures initiate and propagate in different brain regions. Long-term intracranial multichannel electroencephalography (EEG) reflects broadband ictal activity under seizure occurrence. Network-based techniques are efficient in discovering brain dynamics and offering finger-print features for specific individuals. In this study, we adopt link prediction for proposing a novel workflow aiming to quantify seizure dynamics and uncover pathological mechanisms of epilepsy...
2018: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/30057732/electrochemotherapy-effectiveness-loss-due-to-electric-field-indentation-between-needle-electrodes-a-numerical-study
#8
José Alvim Berkenbrock, Rafaela Grecco Machado, Daniela Ota Hisayasu Suzuki
Electrochemotherapy is an anticancer treatment based on applying electric field pulses that reduce cell membrane selectivity, allowing chemotherapy drugs to enter the cells. In parallel to electrochemotherapy clinical tests, in silico experiments have helped scientists and clinicians to understand the electric field distribution through anatomically complex regions of the body. In particular, these in silico experiments allow clinicians to predict problems that may arise in treatment effectiveness. The current work presents a metastatic case of a mast cell tumor in a dog...
2018: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/30057731/a-novel-wire-is-effective-for-echo-guiding-percutaneous-atrial-septal-defect-closure-a-preclinical-study
#9
Yao Liu, Gai-Li Guo, Feng-Wen Zhang, Bin Wen, Wen-Bin Ou-Yang, Yong-Quan Xie, Xiang-Bin Pan
Objective: To assess the effectiveness of a novel ultrasound wire for echo-guiding percutaneous atrial septal defect (ASD) closure in a sheep model. Methods: After right lateral thoracotomy, ASDs were created in 20 sheep by transseptal needle puncture followed by balloon dilatation. Animals were evenly randomized into 2 groups to undergo ASD closure using echography as the only imaging tool with either COOK wire (control group) or new ultrasound wire (study group)...
2018: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/30057730/atrial-fibrillation-beat-identification-using-the-combination-of-modified-frequency-slice-wavelet-transform-and-convolutional-neural-networks
#10
Xiaoyan Xu, Shoushui Wei, Caiyun Ma, Kan Luo, Li Zhang, Chengyu Liu
Atrial fibrillation (AF) is a serious cardiovascular disease with the phenomenon of beating irregularly. It is the major cause of variety of heart diseases, such as myocardial infarction. Automatic AF beat detection is still a challenging task which needs further exploration. A new framework, which combines modified frequency slice wavelet transform (MFSWT) and convolutional neural networks (CNNs), was proposed for automatic AF beat identification. MFSWT was used to transform 1 s electrocardiogram (ECG) segments to time-frequency images, and then, the images were fed into a 12-layer CNN for feature extraction and AF/non-AF beat classification...
2018: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/30057729/efficiency-analysis-of-healthcare-system-in-lebanon-using-modified-data-envelopment-analysis
#11
Mustapha D Ibrahim, Sahand Daneshvar
The inflow of refugees from Syria into Lebanon necessitates a robust and efficient healthcare system in Lebanon to withstand the growing demand for healthcare service. For this purpose, we evaluate the efficiency of healthcare system in Lebanon from 2000 through 2015 by applying a modified data envelopment analysis (DEA) model. We have selected four output variables: life expectancy at birth, maternal mortality ratio, infant mortality rate, and newly infected with HIV and two input variables: total health expenditure (% of GDP) and number of hospital beds...
2018: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/30050671/influence-of-shopping-bags-carrying-on-human-responses-while-walking
#12
Mohamed Z Ramadan, Tamer M Khalaf, Adham M Ragab, AbdElatty A AbdElgawad
Shopping as a daily activity that involves carrying shopping bags in hands might be associated with risk factors contributing to the development of low back pain (LBP) and strains and sprains in the upper extremity. A three-way repeated measures experiment was conducted for the purpose of the study. The independent variables were holding style, carrying technique, and shopping bags' weights. The dependent variables were cardiac cost, muscles' activities as a percentage of their maximum voluntary contraction's EMG (%MVC), peak plantar pressure (PPP), and discomfort rating...
2018: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/30050670/multichannel-surface-emg-decomposition-based-on-measurement-correlation-and-lmmse
#13
Yong Ning, Yuming Zhao, Akbarjon Juraboev, Ping Tan, Jin Ding, Jinbao He
A method based on measurement correlation (MC) and linear minimum mean square error (LMMSE) for multichannel surface electromyography (sEMG) signal decomposition was developed in this study. This MC-LMMSE method gradually and iteratively increases the correlation between an optimized vector and a reconstructed matrix that is correlated with the measurement matrix. The performance of the proposed MC-LMMSE method was evaluated with both simulated and experimental sEMG signals. Simulation results show that the MC-LMMSE method can successfully reconstruct up to 53 innervation pulse trains with a true positive rate greater than 95%...
2018: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/30046416/nonlinear-predictive-threshold-model-for-real-time-abnormal-gait-detection
#14
Masoud Hemmatpour, Renato Ferrero, Filippo Gandino, Bartolomeo Montrucchio, Maurizio Rebaudengo
Falls are critical events for human health due to the associated risk of physical and psychological injuries. Several fall-related systems have been developed in order to reduce injuries. Among them, fall-risk prediction systems are one of the most promising approaches, as they strive to predict a fall before its occurrence. A category of fall-risk prediction systems evaluates balance and muscle strength through some clinical functional assessment tests, while other prediction systems investigate the recognition of abnormal gait patterns to predict a fall in real time...
2018: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/30034677/gastric-pathology-image-classification-using-stepwise-fine-tuning-for-deep-neural-networks
#15
Jia Qu, Nobuyuki Hiruta, Kensuke Terai, Hirokazu Nosato, Masahiro Murakawa, Hidenori Sakanashi
Deep learning using convolutional neural networks (CNNs) is a distinguished tool for many image classification tasks. Due to its outstanding robustness and generalization, it is also expected to play a key role to facilitate advanced computer-aided diagnosis (CAD) for pathology images. However, the shortage of well-annotated pathology image data for training deep neural networks has become a major issue at present because of the high-cost annotation upon pathologist's professional observation. Faced with this problem, transfer learning techniques are generally used to reinforcing the capacity of deep neural networks...
2018: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/30034676/nonlocal-coherent-denoising-of-rf-data-for-ultrasound-elastography
#16
P Khavari, A Asif, M Boily, H Rivaz
Ultrasound elastography infers mechanical properties of living tissues from ultrasound radiofrequency (RF) data recorded while the tissues are undergoing deformation. A challenging yet critical step in ultrasound elastography is to estimate the tissue displacement (or, equivalently the time delay estimate) fields from pairs of RF data. The RF data are often corrupted with noise, which causes the displacement estimator to fail in many in vivo experiments. To address this problem, we present a nonlocal, coherent denoising approach based on Bayesian estimation to reduce the impact of noise...
2018: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/30034675/platelet-rich-plasma-hydroxyapatite-and-chitosan-in-the-bone-and-cartilaginous-regeneration-of-femoral-trochlea-in-rabbits-clinical-radiographic-and-histomorphometric-evaluations
#17
Francisco Alipio de Sousa Segundo, Edla Iris de Sousa Costa, Adílio Santos de Azevedo, Ana Lucélia de Araújo, Ana Clara de França Silva, Gabriel Goetten de Lima, Marcelo Jorge Cavalcanti de Sá
The aim of this study was to evaluate the trochlear bone and cartilaginous regeneration of rabbits using the association of PRP, chitosan, and hydroxyapatite. Hole was made in rabbit troches, one hole in each animal remained empty (group C), and one was filled by a combination of PRP, chitosan, and hydroxyapatite (group T). Clinical-orthopedic, radiographic, and histomorphometric evaluations were performed. Clinical-orthopedic evaluation showed lameness of two members of the T group and one member of group C...
2018: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/30034674/an-efficient-middle-layer-platform-for-medical-imaging-archives
#18
Atilla Ergüzen, Erdal Erdal
Digital medical image usage is common in health services and clinics. These data have a vital importance for diagnosis and treatment; therefore, preservation, protection, and archiving of these data are a challenge. Rapidly growing file sizes differentiated data formats and increasing number of files constitute big data, which traditional systems do not have the capability to process and store these data. This study investigates an efficient middle layer platform based on Hadoop and MongoDB architecture using the state-of-the-art technologies in the literature...
2018: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/30034673/using-six-sigma-dmaic-methodology-and-discrete-event-simulation-to-reduce-patient-discharge-time-in-king-hussein-cancer-center
#19
Mazen Arafeh, Mahmoud A Barghash, Nirmin Haddad, Nadeem Musharbash, Dana Nashawati, Adnan Al-Bashir, Fatina Assaf
Short discharge time from hospitals increases both bed availability and patients' and families' satisfaction. In this study, the Six Sigma process improvement methodology was applied to reduce patients' discharge time in a cancer treatment hospital. Data on the duration of all activities, from the physician signing the discharge form to the patient leaving the treatment room, were collected through patient shadowing. These data were analyzed using detailed process maps and cause-and-effect diagrams. Fragmented and unstandardized processes and procedures and a lack of communication among the stakeholders were among the leading causes of long discharge times...
2018: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/30034672/human-inspired-reflex-to-autonomously-prevent-slip-of-grasped-objects-rotated-with-a-prosthetic-hand
#20
Zachary Ray, Erik D Engeberg
Autonomously preventing grasped objects from slipping out of prosthetic hands is an important feature for limb-absent people since they cannot directly feel the grip force applied to grasped objects. Oftentimes, a satisfactory grip force in one situation will be inadequate in different situations, such as when the object is rotated or transported. Over time, people develop a grip reflex to prevent slip of grasped objects when they are rotated with respect to gravity by their natural hands. However, this reflexive trait is absent in commercially available prosthetic hands...
2018: Journal of Healthcare Engineering
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