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Diagnostic study reveals electromagnetic signal shifts during pulmonary edema, suggesting a noninvasive approach for cardiopulmonary monitoring.
This communication describes a new technique in which penetrating microwave radiation is used for the diagnosis and monitoring of pathological cardiopulmonary conditions, such as pulmonary edema. Edema causes changes in the electromagnetic characteristics of the lung tissue, which in turn produces a change in the reflected and transmitted microwave radiation. Both the amplitude and phase changes of the microwave signals are measured.
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Pedersen et al. (1976) studied this question.
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