This paper presents a projective reconstruction method of electrical impedance distribution using two boundary measurements of current-voltage data. The proposed method has a major advantage over existing electrical impedance tomography systems: relatively high resolution impedance image in a near-surface region underneath the voltage-sensing probe that is placed on a skin surface. We attach tw...

This paper describes a non-invasive continuous glucose monitoring system based on impedance spectroscopy. Changes in the glucose concentrations can be monitored by varying the frequency in the radio band over a range, optimised to measure the impact of glucose on the impedance pattern. A number of clinical-experimental studies (hyperglycaemic excursions) were performed with healthy subjects in ...

Delivering an injection correctly into the small diamater lumen of a tubular biological structure placed under the skin and not visible to the eye presents difficulties in medical practice. Suitable assist devices are currently not available. A new concept has been formulated to combine four modes of nonradiological imaging: scanning electrical impedance plethysmography; ultrasound; transillumi...

Measurement of complex impedance of biological systems is gaining wide popularity in determining the pathological and physiological status of tissues in research areas such as; body fat content, blood freshness, tissue ischemia, skin hydration, and etc. In this paper, we designed a fourprobe, multi-frequency impedance meter for quick assessment of the viability of erythrocyte suspensions under ...

Ultrasonic surface-haptic touchscreens produce compelling tactile sensations directly on the users’ fingertips. The stem from modulation of friction produced by acoustic radiation pressure, which reduces contact between skin and glass plate. During this process, some vibrations are partly absorbed tissues, resulting in a conspicuous change vibration amplitude plate upon with finger, manifests a...

Background: Radiofrequency has been proven to penetrate deeper than optical light sources independent of skin color allowing a safer treatment for the Asian skin type. Many studies have indicated the efficacy of various types of devices, but have not included a sufficient objective evaluation. Multisource radiofrequency uses multiple phase controlled radiofrequency generators with real time imp...

The effectiveness in transdermal delivery of skin permeation strategies (e.g., chemical enhancers, vesicular carrier systems, sonophoresis, iontophoresis, and electroporation) is poorly investigated outside of laboratory. In therapeutic application, the lack of recognized techniques for measuring the actually-released drug affects the scientific concept itself of dosage for topically- and trans...

In biomedical applications such as the electroencephalogram, electrocardiogram and electromyogram, usually conductive hydrogels are applied to the skin providing a skin–electrode layer, with the aim of lowering contact impedance and improving the signal/noise ratio. It is important to know the electrical behavior of these materials, obtaining reliable values of their conductivity. It can be ext...

OBJECTIVE Our group has developed a bipolar bioimpedance measurement-based method for determining the state of wound healing. The objective of this study was to assess the capability of the method. METHODS To assess the performance of the method, we arranged a follow-up study of four acute wounds. The wounds were measured using the method and photographed throughout the healing process. RES...