An objective assessment method for frequency selectivity of the human auditory system
Source, December 18, 2014
Background: Frequency selectivity (FS) is an important aspect of auditory function, and is typically described by a tuning curve function. Sharply tuned curves represent a higher acuity in detecting frequency differences, and conversely, broadly tuned curves demonstrate a lower acuity. One way of ob...
Interactive simulator for e-Learning environments: a teaching software for health care professionals
Source, December 18, 2014
There is an established tradition of cardiovascular simulation tools, but the application of this kind of technology in the e-Learning arena is a novel approach. This paper presents an e-Learning environment aimed at teaching the interaction of cardiovascular and lung systems to health-care professi...
Real-time estimation of respiratory rate from a photoplethysmogram using an adaptive lattice notch filter
Source, December 17, 2014
Background: Many researchers have attempted to acquire respiratory rate (RR) information from a photoplethysmogram (PPG) because respiration affects the waveform of the PPG. However, most of these methods were difficult to operate in real-time because of their complexity or computational requirement...
Simulation of in vivo dynamics during robot assisted joint movement
Source, December 16, 2014
Background: Robots are very useful tools in orthopedic research. They can provide force/torque controlled specimen motion with high repeatability and precision. A method to analyze dissipative energy outcome in an entire joint was developed in our group. In a previous study, a sheep knee was flexed ...
Proposal of a magnetic resonance technique for the evaluation of the calcaneofibular ligament minimizing false positive results
Source, December 16, 2014
Background: Magnetic resonance (MR) techniques used to detect lesions of the ligament complex for articulation of the ankle lack the desired accuracy for the study of the calcaneofibular ligament (CFL). The lack of sensitivity of the conventional techniques is due to variations in the dimensions of ...
3D vasculature segmentation using localized hybrid level-set method
Source, December 16, 2014
Background: Intensity inhomogeneity occurs in many medical images, especially in vessel images. Overcomingthe difficulty due to image inhomogeneity is crucial for the segmentation of vessel image. Methods: This paper proposes a localized hybrid level-set method for the segmentation of 3D vessel imag...
Thin-film electroencephalographic electrodes using multi-walled carbon nanotubes are effective for neurosurgery
Source, December 15, 2014
Background: Intraoperative morphological and functional monitoring is essential for safe neurosurgery. Functional monitoring is based on electroencephalography (EEG), which uses silver electrodes. However, these electrodes generate metal artifacts as silver blocks X-rays, creating white radial lines...
Examination of ceramic restoration adhesive coverage in cusp-replacement premolar using acoustic emission under fatigue testing
Source, December 13, 2014
Background: This study investigates CAD/CAM ceramic cusp-replacing restoration resistance with and without buccal cusp replacement under static and dynamic cyclic loads, monitored using the acoustic emission (AE) technique.MethodThe cavity was designed in a typical MODP (mesial-occlusal-distal-palat...
Invariant heart beat span versus variant heart beat intervals and its application to fetal ECG extraction
Source, December 12, 2014
Background: The fundamental assumptions for various kinds of fetal electrocardiogram (fECG) extraction methods are not consistent with each other, which is a very important problem needed to be ascertained. Methods: Based on two public databases, the regularity on ECG wave durations for normal sinus...
Computer modeling and ex vivo experiments with a (saline-linked) irrigated electrode for RF-assisted heating
Source, December 12, 2014
Background: Externally irrigated radiofrequency (RF) electrodes have been widely used to thermally ablate tumors in surface tissue and to thermally coagulate the transection plane during a surgical resection. As far as we know, no mathematical model has yet been developed to study the electrical and...
Stories 1 - 10 of 171