Investigation of a body
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United States of America Patent
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May 5, 1998
Grant Date -
N/A
app pub date -
May 30, 1995
filing date -
Oct 30, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of investigation of a body including applying interrogatory electrical signals at different frequencies to the body. First signals are obtained representing first electrical impedance measurements at the different frequencies. Second signals are obtained representing subsequent second electrical impedance measurements at the different frequencies after a change in the internal state of the body. Characteristics of part of the body are selectively determined in response to the first and second signals at the different frequencies. The invention has application in electrical impedance tomography techniques where the different frequency behavior of different parts of the body associated with temporal changes can be used to improve organ resolution and tissue differentiation.
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