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IMAGING OF GASTRIC EMPTYING WITH ELECTRICAL IMPEDANCE Andy ADLER, Robert GUARDO, Yves BERTHIAUME
 

Summary: IMAGING OF GASTRIC EMPTYING WITH ELECTRICAL IMPEDANCE
TOMOGRAPHY
Andy ADLER, Robert GUARDO, Yves BERTHIAUME
Institut de Génie Biomédical, Ecole Polytechnique et Université de Montréal, Québec, Canada
Centre de Recherche, Hôpital Hôtel Dieu de Montréal, Montréal, Québec, Canada
Abstract - Electrical Impedance Tomography uses
surface electrical measurements to image changes in the
conductivity distribution within a medium. This technique
was applied to the measurement of gastric motility by
imaging conductivity changes in the abdomen after
ingestion of liquid. Preliminary results show good
correlation with typical clinical measurements.
composition, and caloric content have a large effect on
the gastric motility.
Experimental Procedure.
Our EIT data acquisition system[1] uses 16 electrodes
for both current injection and voltage measurement, and
is able to read the induced voltage at all electrodes for
one injection pattern in 40 ms. In this experiment, a
current injection of 1 mA at 13 kHz was used (this is

  

Source: Adler, Andy - Department of Systems and Computer Engineering, Carleton University

 

Collections: Computer Technologies and Information Sciences