In this paper it is shown the experimental measurements made of generated radiation by mobile phones, and corresponding conclusions when comparing them with values provided manufacturers. The so-called specific absorption rate (SAR) calculated from amount electromagnetic energy emitted phones absorbed human body. It was found that obtained are within allowed values, which suggests radio frequen...

Electromagnetic wave absorption inside a human body is investigated. The human body has been modeled using 3D voxel based dataset considering different electrical parameters. At GSM 900 band, Specific Absorption Rate (SAR) induced inside the human body model exposed to a radiating base station antenna (BSA) has been calculated for multiple number of carrier frequencies and input power of 20 W/c...

In this paper, we use a human head and shoulder model to extend the theory and analysis of specific absorption rates (SAR) in the human head due to radiation caused by passive radio frequency identification (RFID) reader systems. We use a finite-element method (FEM), and a human head and shoulder model with a voxel size of 8mm for the tetrahedral to analyze the peak one-voxel SAR, spatial-peak ...

High intestinal sodium absorption is one mechanism of hypertension and constipation. The sodium-proton-exchanger subtype 3 (NHE3) is an important mediator of sodium absorption in the gut. SAR218034 (SAR) is an orally nonabsorbable specific NHE3 inhibitor. The effect of SAR (1 mg/kg per day in chow) on feces sodium excretion, systolic blood pressure via tail cuff, and gene expression of NHE3 in ...

Finite-difference time-domain (FDTD) simulations of specific-absorption rate (SAR) have several uncertainty factors. For example, significantly varying SAR values may result from the use of different algorithms for determining the SAR from the FDTD electric field. The objective of this paper is to rigorously study the divergence of SAR values due to different SAR calculation algorithms and to e...

OBJECTIVES Our two objectives were to evaluate the feasibility of fetal brain magnetic resonance imaging (MRI) using a fast spin echo sequence at 3.0T field strength with low radio frequency (rf) energy deposition (as measured by specific absorption rate: SAR) and to compare image quality, tissue contrast and conspicuity between 1.5T and 3.0T MRI. METHODS T2 weighted images of the fetal brain...

Introduction: Simulations of RF coils loaded with human head and body models are seen in the literature [1-5]. Little research, however, focuses on the loading effects of human head or body dimension on the B1 field, signal to noise (SNR) and specific absorption ratio (SAR). Human head sizes can vary greatly [6] and this may seriously affect these NMR parameters, especially at higher fields. Th...

BACKGROUND Dual-channel transmit technology improves the image quality in cardiovascular magnetic resonance (CMR) at 3 T by reducing the degree of radiofrequency (RF) shading over the heart by using RF shimming. Further improvements in image quality have been shown on a dual-transmit system using high permittivity pads. The aim of this study is to investigate the transmit field (B 1 (+)) homoge...

Introduction: Tissue heating and local Specific Absorption Rate (SAR) is a major problem for high field MRI, particularly when using multiple transmit channels. In the framework of Electric Properties Tomography (EPT), the local SAR is estimated based on a B1 map [1]. Recently, first preliminary low resolution in vivo SAR images were obtained [2]. In this study, B1-based local SAR is determined...