Download Electromagnetic Fields in Biological Systems by James C. Lin PDF

By James C. Lin

As instant expertise turns into extra subtle and obtainable to extra clients, the interactions of electromagnetic fields with organic structures have captured the curiosity not just of the medical neighborhood but additionally most of the people. accidental or deleterious organic results of electromagnetic fields and radiation may possibly point out grounds for health and wellbeing and security precautions of their use. Spanning static fields to terahertz waves, Electromagnetic Fields in organic platforms explores the diversity of results those fields have at the human physique. With contributions through an array of specialists, themes mentioned comprise: crucial interactions and box coupling phenomena, highlighting their value in learn on organic results and in clinical, business, and clinical purposes electrical box interactions in cells, concentrating on ultrashort, pulsed high-intensity fields The impact of publicity to evidently taking place and human-made static, low-frequency, and pulsed magnetic fields in organic structures Dosimetry or coupling of super low frequency (ELF) fields into organic platforms and the historic advancements and up to date tendencies in numerical dosimetry cellular verbal exchange units and the dosimetry or coupling of radiofrequency (RF) radiation into the human physique publicity and dosimetry linked to magnetic resonance imaging (MRI) and spectroscopy to be had information at the interplay of terahertz radiation with organic tissues, cells, organelles, and molecules there's nice capability for verbal exchange, business, clinical, and clinical use of electromagnetic fields and radiation. to aid develop wisdom of the organic results of such fields and to use their strength clinical purposes, this publication highlights severe matters on the subject of their results on residing platforms.

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Specifically, FDTD calculations of SAR distribution in anatomical models of children and adults exposed to uniform RF field of both vertical and horizontal polarizations have been conducted at frequencies in the cellular mobile communication band (900–3000 MHz). In a study by Piuzzi et al. (2011), five different human body models were developed; all were obtained by appropriately scaling the segmented VH data set along the three spatial directions while maintaining a 2-mm resolution. They include an adult model and two 13-year-old and two 7-year-old child models.

2005). The result of their study supported the conclusion that since the brain is closer to the cell phone in the heads of children, the absorption of RF energy in child brain models is slightly higher than that in adults. Another study showed that 1- and 10-g average SAR values are significantly influenced by the SAR averaging procedure. Adoption of a fixed-cube averaging procedure yielded a marked increase in average SAR with decreasing head size (Bit-Babik et al. 2005). However, the results of the study conducted by Beard et al.

Moreover, the peak and average SAR values may be several times greater than the values for homogeneous models. The enhancement is apparently due to resonant coupling of plane-wave RF into the brain sphere by the outer tissue layers. Although a spherical model can provide some results that are relatively close to those obtained with more realistic head models, the SAR values obtained with spherical or simplified head models that do not include the ear tend to be greater than those obtained with head models that include the ear.

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