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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...
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
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....
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...
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...
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...
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...
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...
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,...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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