Download Advances in Electromagnetic Fields in Living Systems by James C. Lin PDF

By James C. Lin

The aim of this fourth quantity within the sequence Advances in Electromagnetic Fields in residing structures remains kind of like past volumes: so as to add a few major advances during this zone of analysis to clinical literature.

In basic, the interplay of electromagnetic fields and waves with organic structures is frequency-dependent. in addition, the mechanisms of interplay for fields at low frequencies are very assorted from these at excessive frequencies. whereas major advances are being made on many fronts, a unique emphasis of this quantity is on present and destiny biomedical purposes of electromagnetic fields, ranging in frequency from quasi-static to the optical area. each one bankruptcy involves a finished presentation of an issue of present curiosity and turning out to be value.

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2002, Clinical implications of fetal magnetocardiography, Ultrasound Obstet Gynecol, 20(2):142–153. , Schreiber T. , 1998, Fetal ECG extraction with nonlinear state-space projections, IEEE Trans Biomed. , 45(1):133–137. B. , 1965, The fetal electrocardiogram, Am. J. Obstet. , 92:1149–1159. , Mehtar M. , 1984, Normalisation of body impedance data: a theoretical study, Med Biol Eng Comput, 22:285–286. , Rosti D. , 1998, Prolongation of the QT interval and the sudden infant death syndrome, New Engl.

The reason behind this shift is the distribution of the mechanical load between the left and right ventricle [Namin and Miller, 1966]. After birth, the right ventricle pumps the blood to the lungs and the left ventricle pumps the blood through the body. The heart adapts by increasing the thickness of the wall of the left ventricle. As a consequence, the depolarization front in the left ventricle will dominate the net current dipole. At birth, the left ventricular wall has not yet adapted and the fetal heart dipole is still seen, in which the right side dominates over the left side.

Generates a counterbalancing flux. The superconducting current is linear proportional to the applied magnetic flux. The input coil is a small coil that is positioned on top of the SQUID. The superconducting current in this coil generates a magnetic flux, which in turn is linear proportional to the superconducting current. This magnetic flux, being linearly proportional to the applied magnetic flux, is inductively coupled into the SQUID. The configuration given in Fig. 12 is a first-order gradiometer. The pick-up coil consists of two coils at a certain distance wound in opposite directions.

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