Focused Impedance Measurement (FIM): A New Technique with Improved Zone Localization

摘要: Conventional four-electrode impedance measurements (FEIM) cannot localize a zone of interest in volume conductor. On the other hand, recently developed electrical tomography (EIT) system offers an image with reasonable resolution, but is complex and needs many electrodes. By placing two FEIM systems perpendicular to each over common at center combining results, it possible obtain enhanced sensitivity this central zone. This basis proposed new method focused measurement (FIM). Sensitivity maps both 2D 3D show desired improvement. A comparison stomach-emptying studies also indicates improvement achieved. may be useful for large organs like stomach, heart, lungs. Being much simpler EIT, multifrequency can simply built FIM. Besides, FIM have utility fields geology where are performed.