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With increasing interest in the usage of wearable wireless communication technologies at UHF (0.3–3 GHz) and UWB (3.1–10.6 GHz) frequencies, investigations on the human body interaction with these devices is becoming important. This paper provides a Microstrip based multi-band monopole antenna for Body Wearable Wireless Devices (BWWD), resonating at 1.8 GHz, 2.4 GHz, UWB frequencies, covering licensed...
Effects of the following factors were investigated: ultrasound, electrical and magnetic fields, laser and heat radiation - on the in vivo biological tissue and on the phantom of an animal origin. The mentioned physical factors are provided by the multifunctional devices for raflexotherapy and intracavitary action. It is shown that the penetration depth into biological tissue and coverage area over...
We present analytical and experimental results of an antireflection coating for biological tissues at 60 GHz. The analytical study estimates the improvement in the transmitted power when perfect impedance matching is achieved by placing a metamaterial film in front of skin tissue. The estimated improvement is up to 4 dB. We subsequently present results from an animal trial where we demonstrate 1.9...
Raman spectroscopy of biological tissue presents fluorescence background, an undesirable effect that generates false Raman intensities. This paper proposes the application of the Empirical Mode Decomposition (EMD) method to baseline correction. EMD is a suitable approach since it is an adaptive signal processing method for nonlinear and non-stationary signal analysis that does not require parameters...
With the quick development and widespread use of mobile phones has led to arising concern about the possible adverse health effects of radio frequency electromagnetic field exposure. This study aims to present the dosimetry analysis of the electromagnetic fields induced by mobile phone on human endocrine glands. A finite-difference time-domain (FDTD) method was employed to calculate the specific absorption...
Nowadays, Implantable antenna in Wireless Body Area Networks WBAN has been a standout amongst the most creative subjects in antenna theory and design. It has emerged the world as a new technology for medical applications. Unfortunately, a number of obstacles that disrupt the communication system still need to be overcome to improve clinical applications. Further, the properties of biological tissues...
Nowadays, communication networks have become indispensable in our daily lives. In the last years, new networks have been developed, such as the body wireless sensor network “BAN”. So it will be necessary to highlight the influence of the body on the radiation pattern, performance and adaptation of the antenna. To understand the interaction between electromagnetic waves and the human body, it is important...
Localizing a bone hidden behind soft tissue is crucial in biomechanics. A typical approach consists in placing markers on the skin, measuring their position/orientation, and from these measurements, estimating the position and orientation of the bone hidden behind the skin while compensating of soft tissue deformations. In this paper, we present a new method to address this problem. It requires to...
Multi-spectral imaging (MSI) and its analysis methods were investigated to determine end-point of photothermal damage of tissue. MSI revealed denatured porcine tissue after irradiation of laser with irradiance lower than photothermal damage threshold.
Implantable medical device is an effective means of modern medical treatment and diagnosis. Its energy and data wireless transmission way become a research hot spot in bio-electronic field. The purpose of this paper is to study the influence of biological channel on the electromagnetic wave transmission characteristics in specific biological environment. In this paper, the biological tissues channel...
Surgical method for removing pathologically altered areas of tissue is analyzed. Skin pathologies such as benign papillomas and Dupuytren's contracture, the removal of which may be carried out using cold plasma (CP-coblation) are analyzed. The advantages of coblation listed. The test results of cold plasma application on biopsy of muscle tissue with the experimental setup are shown. The paper examines...
Biological tissues are seen as multilayer structures. We will use in this article a model with three layers: skin, fat and muscle. This structure may be related to a pattern of cascaded lines where each tissue has its own characteristic impedance, permittivity and conductivity. This structure allows us to solve the problem of the surface impedance. Each layer is similar to a line of characteristic...
Traditional pressure pulse sensor device is forward stepwise pressurization pressure, this approach leads to rebound phenomenon, making the test instability, longer test time, increase the float in the sink so the difficulty of distinguishing veins. Research described in this article is subject to the same method to measure pressure, taken to reverse the method and the positive pressure pulse method...
Premature newborns are at high risk of developing infections, so they require continuous monitoring of vital parameters for long periods of time; approximately until they reach the pregnancy due date. Electrocardiogram (ECG) is one of the most widely used methods for evaluating the structure-function relationships of the heart in health and disease. Due to incomplete skin development, the very premature...
We investigate the design of a low-power, non-invasive device for detection of air cavities in the space between chest and lung (i.e. pneumothorax). To this end, we study the operational frequency band and sensitivity capabilities of such device. Simplified scenarios of parameterized layered biological models in the exposure of electromagnetic plane wave and coupled radiating antennas are assessed,...
Needles provide percutaneous access to tissues deep within the body in order to deliver therapy or acquire biological samples for diagnostic purposes. The effectiveness of needle-based access often requires very accurate targeting of the needle tip within tissue. We designed a device that uses suction to fixate tissue during robotic needle insertion and measured its ability to improve targeting accuracy...
A meshless model is developed to investigate behaviors of heat conduction in skin tissues. The model is established through combined use of Laplace transform (LT), radial basis function (RBF) and method of fundamental solution (MFS). The well-known Pennes bioheat model is used to describe the process of heat conduction in skin tissues. First, Laplace transform is applied to handle the time variable...
State of the art biological imaging methods, such as confocal microscopy, create 3D volumes by sampling on a cartesian grid. This cartesian coordinate system is often not convenient for visualization and analysis of multi layered organs or tissues. The ascidian embryonic tail, for example, is organized along anterioposterior (AP), dorsoventral (DV) and left-right (LR) axes that are locally orthogonal...
Segmenting brain from non-brain tissue within magnetic resonance (MR) images of the human head, also known as skull-stripping, is a critical processing step in the analysis of neuroimaging data. Though many algorithms have been developed to address this problem, challenges remain. In this paper, we apply the “deformable organism” framework to the skull-stripping problem. Within this framework, deformable...
In this work we assess the feasibility of focused electromagnetic ablation of breast cancer. In our approach we consider two degrees of freedom, namely the bolus permittivity and the operational frequency. The electric fields in a two-dimensional configuration are computed per source using the iterative conjugate gradient method. The fields are subsequently focused in two lesions. The focusing performance...
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