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Imaging the electrical properties of the human body for diagnostic purposes has been researched since the 1980s with an increasing interest. In recent years, the excitation and measurements were thought to be realized via inductively using coils instead of electrodes. One of the major difficulties of imaging with this method, which is also referred to as magnetic induction tomography (MIT), is the motion artifacts in the images. In the previous studies, it was shown that the motion artifacts can be filtered out if the body deformation and motions are known. For this, it is essential to determine the position of the patient's body surface by means of optic and distance sensors and to use this information to design the linear filters. However, this brings additional costs and complexity to the existing system. In this paper, a feasibility study of the method was performed in order to eliminate the motion artifacts, by determining the patient's body deformations using MITs existing coils without using additional sensing circuitry.
Date of Conference: 21-24 April 2010