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In this paper, it is shown that the main source of mechanical energy of cardiovascular (CV) system i.e., rhythmic heart contraction is transformed to the oscillations of the CV walls and blood flow, and finally CV acoustical waves. These waves propagate through both blood flow (hemodynamical pathways) and tissues (viscoelastical pathways) toward the skin. Nonetheless, the CV walls could be assumed...
In this paper, we propose a measuring device implementation to measure ECG, 50 KHz BIA for getting BIA/respiration, and 10~50 Hz GSR for measuring electrical characteristics of skin. To this end, BIA signal is separated by line filter and high impedance element and the interference between signals could be minimized by switching in time domain to separate ECG and GSR signals having the similar frequency...
We developed a brand-new method that fits the non-invasive blood component concentration measurement: the dynamic spectrum (DS) method. With use of this method, it was possible to eliminate the main interference of the individual discrepancy and extract some kinds of the blood component concentration by the analytic method. The definition, principle and measure method of the dynamic spectrum are presented...
Health smart clothes are in contact with almost all the surface of the skin offer large possibilities for the location of sensors for non invasive measurements. Head band, collar, tee-shirt, socks, shoes, belts for chest, arm, wrist, legs ... provide localization with specific purpose taking into account their proximity of an organ or a source of biosignal, and also its ergonomic possibility (user...
Surface motor unit action potential (SMUAP) is generated from a motor unit (MU) located at certain depth from the skin surface. The depth is referred to as MU location in the present papers. The MU location affects the amplitude of MUAP, and smoothed rectified electromyogram (SR EMG) is used to estimate for the muscle force. The aim of this study is to investigate MU locations in the short head of...
Inductive coupling is a common way to wirelessly transmit data to medical implants. In such applications, the carrier frequency is often limited to tens of MHz which is able to well penetrate the skin. To achieve high data rate, the number of carrier cycles used to modulate each bit should be as small as possible. This usually requires lowering the quality factor (Q) of the data transmission network,...
The advanced imaging technique for visualizing two-dimensional water content distribution in the stratum corneum of human skin is proposed. The method involves two elemental principles of spectral filtering and imaging with polarization control. It is found in the in vivo experiment in the visible and the near-infrared range that the reflectance spectra of skin tissue in the wavelength range shorter...
The aim of the present work was to assess the merits of nanostructured lipid carriers (NLCs) as vehicles for transdermal iontophoretic drug delivery. For the measurements, either a model drug (triamcinolone acetonide acetate, TAA) or a lipophilic fluorescent probe (nile red, NR) was encapsulated into NLCs. The NLCs with sizes of 100 nm and 350 nm diameter were prepared by high-pressure homogenization...
Nevoscope is an optical imaging device to obtain images of skin-lesions through back-scattered diffused light using trans-illumination to determine abnormalities such as skin-cancers. Due to the nature of the process of trans-illumination, images obtained from Nevoscope suffer from a dark-field effect. We proposed a two-step algorithm to restore Nevoscope images under the trans-illumination mode....
We used sub-terahertz (THz) imaging to exam two cross sections of epithelial cancer tissue embedded in paraffin using a 0.19 THz electromagnetic wave. The sub-THz imaging system was constructed with a tunnel injection transit time (TUNNETT) diode, a Schottky barrier diode detector and a X-Z stage. We examined the difference between a sub-THz wave absorption in melanoma and nevus tissue
The nurses do their phlebotomized work or the transfusion for the patients according to their experiences usually. The infrared thermal image display system for the veins location is designed. In the system, a special infrared amplification lens is designed to make the image clear. A gradual approach method for the preponderant signals amplification is described in the veins image data processing...
Alternative site capillary blood sampling may be a useful way to reduce pain during skin puncture. The present study made quantitative measurement of pain and blood volume for both finger and arm sampling in 58 normal female subjects. Visual pain measures resulted in 1/5~1/3 pain scores for arm relative to finger sampling. Deeper puncture thru skin on arm caused more pain to some degree. 399/464 samples...
Vascular injury is an important damage mechanism of cancer treatment modalities such as cryotherapy and hyperthermia. In this study, tumor microvasculature response to locally alternated cold and heat treatment has been studied via microscope observation and histopathological analysis. The tumor vascular permeability to Rhodamine labeled 100 nm liposomes at different temperatures was quantitatively...
The contrast in dielectric properties between normal breast tissues and malignant tumors is significant. Based on this fact, detection of breast cancer with microwaves has been proposed. Here, a cross-Vivaldi antenna capable of measuring cross-polarization is investigated for tumor detection. Observation of cross-polarized reflections reduces reflections from surfaces such as skin, permitting more...
To investigate the effect of Q-switched Nd:YAG laser irradiation in the wavelength of 1064 nm and 532 nm on guinea pigs' skin tissue, according to the method and dose which are used clinically to treat pigmentary skin diseases, so as to provide some reference and foundation for the clinical usage of Q-switched Nd:YAG laser. Three different doses of Q-switched Nd:YAG laser in the wavelength of 1064...
Electrodermal activity is extensively used for measuring human emotions. Validity and reliability have been questioned by some researchers. This paper reports on highly controlled experiments to determine the validity of electrodermal activity for measuring human emotions. The authors were unable to determine the validity of electrodermal activity for measuring human emotions. Inter and intra subject...
Using 4 biometric sensors, including GSR (galvanic skin response), BVP (blood volume pulse), EKG (electro cardio grapy) and EEG (electro encephalon grapy), this paper proposes to attempt to correlate the presentation of relaxing, engaging or stressful content to the subjective measures provided by participants in experiments. Once the participant interacts with content from one of the 3 conditions,...
AIn this study, we developed a wearable physiological measurement device (bioshirt). The developed bioshirt can record ECG (lead I, lead II, V1), blood oxygen saturation, 2-axis acceleration, and skin temperature in mobile environment. Sensors are embedded into the bioshirt. It showed noticeable performance in terms of usability and monitoring. Respiration signal is acquired by inductive plethysmograph...
A teledermatological service system among Korea, China and Austria has been developed and tested in this research. For successful design and establishment of a teledermatological service system, four elements were considered networking among hospitals and participants, standard specification for teledermatological consultation, database for medical record, and design and implementation of software...
This paper reports a novel instrument for human current perception threshold (CPT) measurement. An objective galvanic skin response (GSR) method is employed to monitor subject's response to quantitative stimuli. Experimental results show that new system is more objective and easy to operate in comparison with conventional quantitative sensory testing systems
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