journal
MENU ▼
Read by QxMD icon Read
search

Medical & Biological Engineering & Computing

journal
https://www.readbyqxmd.com/read/29790102/classification-of-malignant-and-benign-lung-nodules-using-taxonomic-diversity-index-and-phylogenetic-distance
#1
Robherson Wector de Sousa Costa, Giovanni Lucca França da Silva, Antonio Oseas de Carvalho Filho, Aristófanes Corrêa Silva, Anselmo Cardoso de Paiva, Marcelo Gattass
Lung cancer presents the highest cause of death among patients around the world, in addition of being one of the smallest survival rates after diagnosis. Therefore, this study proposes a methodology for diagnosis of lung nodules in benign and malignant tumors based on image processing and pattern recognition techniques. Mean phylogenetic distance (MPD) and taxonomic diversity index (Δ) were used as texture descriptors. Finally, the genetic algorithm in conjunction with the support vector machine were applied to select the best training model...
May 23, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29777506/an-extended-kalman-filter-for-mouse-tracking
#2
Hongjun Choi, Mingi Kim, Onseok Lee
Animal tracking is an important tool for observing behavior, which is useful in various research areas. Animal specimens can be tracked using dynamic models and observation models that require several types of data. Tracking mouse has several barriers due to the physical characteristics of the mouse, their unpredictable movement, and cluttered environments. Therefore, we propose a reliable method that uses a detection stage and a tracking stage to successfully track mouse. The detection stage detects the surface area of the mouse skin, and the tracking stage implements an extended Kalman filter to estimate the state variables of a nonlinear model...
May 19, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29777505/a-fingertip-force-prediction-model-for-grasp-patterns-characterised-from-the-chaotic-behaviour-of-eeg
#3
Rinku Roy, Debdeep Sikdar, Manjunatha Mahadevappa, C S Kumar
A stable grasp is attained through appropriate hand preshaping and precise fingertip forces. Here, we have proposed a method to decode grasp patterns from motor imagery and subsequent fingertip force estimation model with a slippage avoidance strategy. We have developed a feature-based classification of electroencephalography (EEG) associated with imagination of the grasping postures. Chaotic behaviour of EEG for different grasping patterns has been utilised to capture the dynamics of associated motor activities...
May 19, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29777504/implementation-and-validation-of-constitutive-relations-for-human-dermis-mechanical-response
#4
Alessandra Aldieri, Mara Terzini, Cristina Bignardi, Elisabetta M Zanetti, Alberto L Audenino
Finite element models in conjunction with adequate constitutive relations are pivotal in several physiological and medical applications related to both native and engineered tissues, allowing to predict the tissue response under various loading states. In order to get reliable results, however, the validation of the constitutive models is crucial. Therefore, the main purpose of this work is to provide an experimental-computational approach to the biomechanical investigation of soft tissues such as the dermis...
May 19, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29770920/filtered-maximum-likelihood-expectation-maximization-based-global-reconstruction-for-bioluminescence-tomography
#5
Defu Yang, Lin Wang, Dongmei Chen, Chenggang Yan, Xiaowei He, Jimin Liang, Xueli Chen
The reconstruction of bioluminescence tomography (BLT) is severely ill-posed due to the insufficient measurements and diffuses nature of the light propagation. Predefined permissible source region (PSR) combined with regularization terms is one common strategy to reduce such ill-posedness. However, the region of PSR is usually hard to determine and can be easily affected by subjective consciousness. Hence, we theoretically developed a filtered maximum likelihood expectation maximization (fMLEM) method for BLT...
May 17, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29761315/hair-detection-and-lesion-segmentation-in-dermoscopic-images-using-domain-knowledge
#6
Sameena Pathan, K Gopalakrishna Prabhu, P C Siddalingaswamy
Automated segmentation and dermoscopic hair detection are one of the significant challenges in computer-aided diagnosis (CAD) of melanocytic lesions. Additionally, due to the presence of artifacts and variation in skin texture and smooth lesion boundaries, the accuracy of such methods gets hampered. The objective of this research is to develop an automated hair detection and lesion segmentation algorithm using lesion-specific properties to improve the accuracy. The aforementioned objective is achieved in two ways...
May 15, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29752679/wavelet-promoted-sparsity-for-non-invasive-reconstruction-of-electrical-activity-of-the-heart
#7
Matthijs Cluitmans, Joël Karel, Pietro Bonizzi, Paul Volders, Ronald Westra, Ralf Peeters
We investigated a novel sparsity-based regularization method in the wavelet domain of the inverse problem of electrocardiography that aims at preserving the spatiotemporal characteristics of heart-surface potentials. In three normal, anesthetized dogs, electrodes were implanted around the epicardium and body-surface electrodes were attached to the torso. Potential recordings were obtained simultaneously on the body surface and on the epicardium. A CT scan was used to digitize a homogeneous geometry which consisted of the body-surface electrodes and the epicardial surface...
May 12, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29748781/plantar-blood-flow-response-to-accumulated-pressure-stimulus-in-diabetic-people-with-different-peak-plantar-pressure-a-non-randomized-clinical-trial
#8
Fang Pu, Weiyan Ren, Hongyuan Fu, Xuan Zheng, Min Yang, Yih-Kuen Jan, Yubo Fan
The aim of this study was to investigate the plantar blood flow response to the same accumulated pressure stimulus in diabetic patients with different peak plantar pressure (PPP), which is important for assessing the risk of diabetic foot ulcer. Eleven diabetic subjects with high PPP (PPP ≥ 207 kPa) and 8 diabetic subjects with low PPP (PPP < 207 kPa) were asked to walk naturally on a treadmill so as to induce an accumulated stimulus of 73,000 kPa·s on their first metatarsal head, which was monitored with a sensorized insole...
May 11, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29744654/assessment-of-tobacco-smoke-effects-on-neonatal-cardiorespiratory-control-using-a-semi-automated-processing-approach
#9
Sally Al-Omar, Virginie Le Rolle, Alain Beuchée, Nathalie Samson, Jean-Paul Praud, Guy Carrault
A semi-automated processing approach was developed to assess the effects of early postnatal environmental tobacco smoke (ETS) on the cardiorespiratory control of newborn lambs. The system consists of several steps beginning with artifact rejection, followed by the selection of stationary segments, and ending with feature extraction. This approach was used in six lambs exposed to 20 cigarettes/day for the first 15 days of life, while another six control lambs were exposed to room air. On postnatal day 16, electrocardiograph and respiratory signals were obtained from a 6-h polysomnographic recording...
May 10, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29740745/a-novel-method-for-retinal-optic-disc-detection-using-bat-meta-heuristic-algorithm
#10
Ahmad S Abdullah, Yasa Ekşioğlu Özok, Javad Rahebi
Normally, the optic disc detection of retinal images is useful during the treatment of glaucoma and diabetic retinopathy. In this paper, the novel preprocessing of a retinal image with a bat algorithm (BA) optimization is proposed to detect the optic disc of the retinal image. As the optic disk is a bright area and the vessels that emerge from it are dark, these facts lead to the selected segments being regions with a great diversity of intensity, which does not usually happen in pathological regions. First, in the preprocessing stage, the image is fully converted into a gray image using a gray scale conversion, and then morphological operations are implemented in order to remove dark elements such as blood vessels, from the images...
May 9, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29736635/effect-of-distal-thickening-and-stiffening-of-plaque-cap-on-arterial-wall-mechanics
#11
Pengsrorn Chhai, Kyehan Rhee
To investigate the effect of longitudinal variations of cap thickness and tissue properties on wall stresses and strains along the atherosclerotic stenosis, stenotic plaque models (uniformly thick, distally thickened, homogenous, and distally stiffened) were constructed and subjected to computational stress analyses with due consideration of fluid-structure interactions (FSI). The analysis considered three different cap thicknesses-45, 65, and 200 μm-and tissue properties-soft, fibrous, and hard. The maximum peak cap stress (PCS) and strain were observed in the upstream throat section and demonstrated increases of the order of 345 and 190%, respectively, as the cap thickness was reduced from 200 to 45 μm in uniformly thick models...
May 8, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29732525/an-efficient-use-of-mixing-model-for-computing-the-effective-dielectric-and-thermal-properties-of-the-human-head
#12
Varsha Mishra, Smitha Puthucheri, Dharmendra Singh
As a preventive measure against the electromagnetic (EM) wave exposure to human body, EM radiation regulatory authorities such as ICNIRP and FCC defined the value of specific absorption rate (SAR) for the human head during EM wave exposure from mobile phone. SAR quantifies the absorption of EM waves in the human body and it mainly depends on the dielectric properties (ε', σ) of the corresponding tissues. The head part of the human body is more susceptible to EM wave exposure due to the usage of mobile phones...
May 7, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29725915/postprandial-fuzzy-adaptive-strategy-for-a-hybrid-proportional-derivative-controller-for-the-artificial-pancreas
#13
Aleix Beneyto, Josep Vehi
This paper presents a support fuzzy adaptive system for a hybrid proportional derivative controller that will refine its parameters during postprandial periods to enhance performance. Even though glucose controllers have improved over the last decade, tuning them and keeping them tuned are still major challenges. Changes in a patient's lifestyle, stress, exercise, or other activities may modify their blood glucose system, making it necessary to retune or change the insulin dosing algorithm. This paper presents a strategy to adjust the parameters of a proportional derivative controller using the so-called safety auxiliary feedback element loop for type 1 diabetic patients...
May 3, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29713856/the-numerical-study-on-specialized-treatment-strategies-of-enhanced-external-counterpulsation-for-cardiovascular-and-cerebrovascular-disease
#14
Bao Li, Sihan Chen, Xingming Qi, Wenxin Wang, Boyan Mao, Jianhang Du, Xiaoling Li, Youjun Liu
Traditional clinical mode of enhanced external counterpulsation is not targeted for different diseases. Specialized strategies in the treatment of enhanced external counterpulsation for coronary heart disease and cerebral ischemic stroke are supposed to be distinguished. The goal of treatment for coronary heart disease is diastolic blood pressure/systolic blood pressure = Q ≥ 1.2 after counterpulsation, while the goal of treatment for cerebral ischemic stroke is the improvement of mean arterial pressure...
May 1, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29696590/direct-nanodrug-delivery-for-tumor-targeting-subject-to-shear-augmented-diffusion-in-blood-flow
#15
Zelin Xu, Clement Kleinstreuer
The advent of multifunctional nanoparticle has enabled numerous innovative strategies in diagnostics, imaging, and cancer therapy. Despite the intense research efforts in developing new nanoparticles and surface bonding ligands, one major obstacle in achieving highly effective treatment, including minimizing detrimental side effects, is the inability to deliver drug-carrying nanoparticles from the injection point directly to the tumor site. The present study seeks to employ a direct nanodrug delivery methodology to feed multifunctional nanoparticles directly to tumor vasculatures, sparing healthy tissue...
April 26, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29682674/a-validation-study-of-a-dedicated-software-for-an-automated-in-vivo-dosimetry-control-in-radiotherapy
#16
A Piermattei, F Greco, M Grusio, S Menna, L Azario, G Stimato, E Placidi, S Teodoli, S Cilla, A Porcelli, L Alberico, A Fidanzio
In vivo dosimetry (IVD) is the last step of a radiotherapy quality control program aimed to ensure that the dose delivered is in agreement with that prescribed. IVD procedures based on single detectors are time-consuming and impossible to use for the modern radiotherapy techniques, based on static or kinetic beams (modulated in intensity fluence); this means that more efficient and practical methods are highly recommended. The practical method SOFTDISO, based on the use of electronic portal image device (EPID), provides two tests (i) the R ratio between the reconstructed and the planned isocenter doses to verify an agreement within 5% and (ii) the γ-analysis of the EPID images, to verify γ% ≥ 90% and γmean ≤ 0...
April 23, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29679256/biomechanical-features-of-six-design-of-the-delta-external-fixator-for-treating-pilon-fracture-a-finite-element-study
#17
Muhammad Hanif Ramlee, Mohd Ayub Sulong, Evelyn Garcia-Nieto, Daniel Angure Penaranda, Antonio Ros Felip, Mohammed Rafiq Abdul Kadir
Pilon fractures can be caused by high-energy vertical forces which may result in long-term patient immobilization. Many experts in orthopedic surgery recommend the use of a Delta external fixator for type III Pilon fracture treatment. This device can promote immediate healing of fractured bone, minimizing the rate of complications as well as allowing early mobilization. The characteristics of different types of the Delta frame have not been demonstrated yet. By using the finite element method, this study was conducted to determine the biomechanical characteristics of six different configurations (Model 1 until Model 6)...
April 21, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29679255/needle-tissue-interactive-mechanism-and-steering-control-in-image-guided-robot-assisted-minimally-invasive-surgery-a-review
#18
Pan Li, Zhiyong Yang, Shan Jiang
Image-guided robot-assisted minimally invasive surgery is an important medicine procedure used for biopsy or local target therapy. In order to reach the target region not accessible using traditional techniques, long and thin flexible needles are inserted into the soft tissue which has large deformation and nonlinear characteristics. However, the detection results and therapeutic effect are directly influenced by the targeting accuracy of needle steering. For this reason, the needle-tissue interactive mechanism, path planning, and steering control are investigated in this review by searching literatures in the last 10 years, which results in a comprehensive overview of the existing techniques with the main accomplishments, limitations, and recommendations...
April 21, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29667119/a-novel-neural-electrode-with-micro-motion-attenuation-capability-based-on-compliant-mechanisms-physical-design-concepts-and-evaluations
#19
Wenguang Zhang, Jiaqi Tang, Zhengwei Li, Yakun Ma
In order to solve the problem of the short lifespan of the neural electrode caused by micro motion, this study designed a novel neural electrode based on lumped compliance compliant mechanism to control different modes of micro-motion in a more effective way. According to the mathematical modeling of the novel neural electrode, the equivalent bending stiffness and equivalent tensile (compression) stiffness were calculated. The results of the finite element analysis based on the mathematical modeling revealed that the novel neural electrode showed excellent micro-motion-attenuation capability...
April 18, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29658053/flow-and-air-conditioning-simulations-of-computer-turbinectomized-nose-models
#20
J Pérez-Mota, F Solorio-Ordaz, J Cervantes-de Gortari
Air conditioning for the human respiratory system is the most important function of the nose. When obstruction occurs in the nasal airway, turbinectomy is used to correct such pathology. However, mucosal atrophy may occur sometime after this surgery when it is overdone. There is not enough information about long-term recovery of nasal air conditioning performance after partial or total surgery. The purpose of this research was to assess if, based on the flow and temperature/humidity characteristics of the air intake to the choana, partial resection of turbinates is better than total resection...
April 16, 2018: Medical & Biological Engineering & Computing
journal
journal
27071
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"