PubMed · 7054569
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C L Compere. 1982-02-05. Electromagnetic fields and bones.. https://doi.org/10.1001/jama.1982.03320300073032
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As a consequence of the variation with frequency of the attenuation and phase velocity of electromagnetic waves in tissue, the shape (variation of the electric field with time) of short electromagnetic pulses incident on tissue changes with depth of penetration. We show that a conjecture that such well-known and long understood changes in pulse shape may generate harmful biological effects is not credible. We also consider the suggestion that such pulses may be useful in medical imaging and the mapping of the electrical properties of complex tissues and show that such use is impracticably difficult for fundamental reasons.
Based on an inductive RF excitation-detection scheme, a quartz-crystal temperature-measuring device is described for applications in MRI and MRS scanners where strong electric and magnetic fields are present. A quartz-crystal resonator with a high temperature sensitivity (88 ppm/degrees C) is employed as the temperature sensor. Changes in the quartz resonance frequency reflecting temperature variations are detected by a NMR coil multiply tuned to the resonance frequencies of the quartz crystal and the nuclei of interest. This wireless probe is simple to build and is capable of measuring temperature changes from -50 to +150 degrees C. The high frequency linearity of the device in this temperature region ensures a simple calibration procedure and a constant temperature resolution.
The article deals with the study of combined exposure to ulta-high frequency electromagnetic waves and lead. Neurocirculatory asthenia was diagnosed in almost half of the examinees, cerebrovascular disorders, erythronormoblastic anemia and impaired porphyric metabolism were seen in some cases. Vegetable drugs improved the health status of examinees and corrected the changed parameters.