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 clinical neighborhood but additionally most of the people. accidental or deleterious organic results of electromagnetic fields and radiation may possibly point out grounds for overall healthiness and safeguard 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 by means of an array of specialists, themes mentioned comprise: crucial interactions and box coupling phenomena, highlighting their significance in examine on organic results and in clinical, business, and clinical functions electrical box interactions in cells, targeting ultrashort, pulsed high-intensity fields The impression of publicity to clearly happening and human-made static, low-frequency, and pulsed magnetic fields in organic platforms Dosimetry or coupling of tremendous low frequency (ELF) fields into organic platforms and the historic advancements and up to date developments 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 facts at the interplay of terahertz radiation with organic tissues, cells, organelles, and molecules there's nice capability for conversation, commercial, medical, and clinical use of electromagnetic fields and radiation. to aid improve wisdom of the organic results of such fields and to use their power clinical functions, this publication highlights severe concerns in relation to their results on residing structures.
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Additional info for Electromagnetic Fields in Biological Systems
D. Phillips. 1980. Comparison of the coupling of grounded humans, swine, and rats to vertical, 60 Hz electric fields. Bioelectromagnetics 1:117–29. 9 Extremely-low-frequency electric field distribution measured at the body surface of a human body subject standing under an electric power transmission line: E 0 is the electric field strength in air. , H. Endo, and G. Matsumoto. 1988. Visualization of electric fields around a biological body. ) human subject standing in an ELF field produced under a high-voltage transmission line.
The two different child phantoms are a child-scaled and a childlike model. The former was obtained by uniformly scaling the VH phantom, whereas the latter was derived by applying a nonuniform scaling, which yielded a more realistic gross anatomy. 83 for front-to-back (y-direction) scaling, to arrive at a final mass of about 80 kg, approximating the weight of a standard-mass adult male (CDC 2009). The two child-scaled models were obtained using appropriate scaling factors along the three directions of the VH model to reproduce a 50% mass-for-age and staturefor-age for this age group (WHO 2000).
Typically, if the largest dimension of the body is comparable to the wavelength of the impinging RF field, energy deposition and distribution will be influenced by the surface curvature of the whole body or the body part and tissue composition. In particular, the ratio of geometric variables and wavelength affects the characteristics of RF energy coupling. 11, where absorbed energy distributions inside a 9-cm-radius homogeneous spherical model of the brain are shown. ) Specific absorption rate distribution inside a brain sphere under plane-wave exposure: The three columns represent values for the xy, yz, and zx planes, respectively.