Focusing Sensor Design for Open Electrical Impedance Tomography Based on Shape Conformal Transformation

Area of Science:

• Medical Imaging
• Electrical Engineering
• Applied Mathematics

Background:

• Electrical Impedance Tomography (EIT) is a non-invasive imaging technique using boundary electrical measurements to detect internal conductivity changes.
• The open EIT (OEIT) problem presents challenges due to infinite observation domains and limited measurement directions, hindering high-resolution imaging.

Purpose of the Study:

• To propose a novel focusing sensor design strategy to enhance imaging quality in OEIT.
• To address the limitations of traditional sensor structures in OEIT for improved spatial resolution.

Main Methods:

• Utilized shape conformal theory and conformal bijection to map a standard EIT sensor to a focusing OEIT sensor.
• Developed and tested a focusing sensor design for an upper half-plane observation domain.

Main Results:

• The proposed focusing sensor demonstrated higher spatial resolution in the near-electrode region compared to traditional designs.
• The new sensor design effectively distinguished multiple, closely located inclusions within the observation area.

Conclusions:

• The focusing sensor design strategy significantly improves OEIT imaging quality, particularly spatial resolution and multi-inclusion differentiation.
• This approach offers a promising advancement for OEIT applications requiring precise imaging in limited-access environments.