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Many researches for useful status information on humans have been done using the bio-signals. The bio-signal acquisition systems can be used to connect a user and a ubiquitous computing environment. The ubiquitous computing environment has to give various services anywhere, anytime. Consequently, ubiquitous computing requires new technology, such as a new user interface, dynamic service mechanism...
Nowadays, due to enhancement of computer performance and popular usage of Webcam devices, it has become possible to acquire users' gestures for the human-computer-interface with PC via Webcam. However, the effects of illumination variation would dramatically decrease the stability and accuracy of skin-based face tracking system; especially for a notebook or portable platform. In this study we present...
For the continuous health monitoring, physiological signal must be able to measure for a long time in daily life. Therefore, health monitoring device was made as small as possible, and sensors must have a small effect by motion artifact. To reduce impedance between the user skin and the electrode, a conductive gel was applied to the metallic electrode, thereby facilitating converting ion current flowing...
Infrared imaging has frequently been used in clinics to detect changes in skin surface temperature associated with some superficial tumors. In order to accurately detect and diagnose tumors (especially in their early stages) using infrared thermography, enhancement of thermal expression on the skin over the tumor is desired. This study proposed a novel approach to effectively enhance the skin thermal...
Although there are many medical image processing and virtual surgery systems that provide rather consummate 3D-visualization and data manipulation techniques, few of them can export the volume data for engineering analyze. The thesis presents an interface implementing IGES (initial graphics exchange specification). Volume data such as bones, skins and other tissues can be exported as IGES files to...
Electrical impedance scanning (EIS) is a new adjunctive diagnostic method for women breast cancer examination. In clinic research, we found some influencing factors which can induce a bad EIS imaging results. In order to analyze the influencing factors on EIS imaging and find the solutions, we set up an EIS workbench which can simulate the influencing factors that may happen in a clinic. We studied...
The objectives of this study is to assess the effect of prolonged loading on the skin blood flowmotion in rats as measured by laser Doppler flowmetry (LDF) using wavelets transform and power spectral in the rat skin microcirculation. External pressure of 13.3kPa (100 mmHg) was applied to the trochanter area and the distal lateral tibia of Sprague-Dawley rats via two specifically designed pneumatic...
The anatomical human structure recognition is very important and necessary during the development of computer-aided diagnosis (CAD) system. In this paper, we propose an image processing scheme that can recognize the general structure of human torso by identifying the human torso region from CT images automatically and separating it into 7 parts: skin, subcutaneous fat, muscle, bone, diaphragm, thoracic...
Psoriasis vulgaris is a chronic inflammatory skin disease with a strong genetic component, characterized by hyperkeratosis, dermal inflammatory infiltrate and increased angiogenesis. The aim of the present study was to employ thermography in evaluation of psoriatic lesions localized in different parts of the body. A series of in-patients with stable plaque type psoriasis vulgaris were included. ThermaCam...
Long-term storage of engineered bio-artificial tissues is required to ensure the off-the-shelf availability to clinicians due to their long production cycle. Cryopreservation is likely the choice for long-term preservation. This study investigated the effects of dimethyl sulfoxide (DMSO) concentrations, cooling rates, cryoprotectant medium treatment methods and seeding on the cell viability of a tissue-engineered...
Hand-held phone use is prohibited by French law to prevent any motor interference with driving. If freehand's kit remains tolerated, its true impact (cognitive interference) is not already clearly determined. This experiment was aimed to study the effect of three communication tasks on driver's behavior: listening to the radio, discussing with a passenger and holding a hands-free phone conversation...
To the elasticity specificity of equivalent materials with human skin's nature, the static-load pressing method for testing the elastic nature of the equivalent material for human skin is approached in this paper, and the experimental set for the testing process is designed. And it is very important and useful to biomedicine science and engineering that evaluating correctly the mechanical property...
The development of systems capable of recognizing and categorising emotions is of interest to researchers in various scientific areas including artificial intelligence. The traditional notion that emotions and rationality are two separate realms has gradually been challenged. The work of neurologists has shown the strong relationship between emotional episodes and the way humans think and act. Furthermore,...
This is a review of the state of the art in two important modalities thermal and electrical properties of living tissues - that are complementary from the point of view of medical diagnostics. Advantages and limitations of IR thermal imaging and electroimpedance measurements, including tomography procedures are discussed. Properties of both modalities are compared from the point of view of skin burn...
Skin temperature was monitored during a graded exercise to verify whether trained individuals have different skin thermoregulation from untrained ones. Eighteen subjects (10 trained; 8 untrained) were studied recording thermal videos of their skin temperature during the exercise. Training level was assessed by maximal oxygen uptake measurements. Trained individuals have better skin thermal control...
The purpose of the present study was to examine the influence of muscle cooling on the passive mechanical properties of the human gastrocnemius muscle (GAS) in vivo. In a thermoneutral (a room temperature of 18-23degC) and a local cooling (placing the right lower leg into cold water with a temperature of 5-8degC for 60 min) conditions, the change in passive plantarflexion force (F), which is produced...
It is expounded the properties of conductance changes of the stratum corneum (SC) under the electric pulse field. It is considered that conductance for SC is determined by activation and inactivation factors. With the diffusion chamber as system, and the SC from cadaver as the object, we studied the behavior of the conductance change under the electric pulse field. The results show that theoretical...
To determine the interaction between skin impedance, measured at acupuncture points, and autonomic nervous response, as expressed through heart rate variability (HRV), we propose a method for correlating frequency components of non-uniformly sampled R-R intervals and the impedance measurements. Since vagal response typically manifests itself in the high frequency (HF) range of HRV, Lomb-Welch periodograms...
Drug galvano-acupuncture is a new medical therapy that has been developed and refined over thirty-one years of research and clinical practice. It uses a combination of modern technology, traditional acupuncture, herbal medicine, and massage therapy techniques. The therapy works by inducing an electric field at the surface of the skin that allows various medications to penetrate the skin's surface...
In this paper we discussed the method to reduce dimensions of segmentation feature applied to skin erythema image segmentation. Basing on analyzing a lot of erythema images, we proposed a new segmentation feature parameter applied to skin erythema image segmentation. At last, by using the fuzzy-c-means cluster arithmetic, we compared the segmentation speed and segmentation effect of adopting different...
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