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Applied Potential Tomography (APT) is a new method of imaging changes in the distribution of electrical resistivity within the human body. Such changes occur during respiration and, because of the movement of blood within the chest, during the cardiac cycle. Changes can also be observed due to redistribution of fluid within the body during simulated weightlessness. As very low electric currents are used to take measurements the method is safe. The equipment is simple and compact and ideal for use in space based measurement of physiological changes in the human body.
Barber et al. (Sat,) studied this question.
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