Lorentz force electrical impedance tomography using magnetic field measurements

Area of Science:

• Biomedical Engineering
• Electromagnetism
• Medical Imaging

Background:

• Accurate imaging of biological tissue electrical conductivity is crucial for disease diagnosis.
• Lorentz force-based techniques offer a non-invasive approach to conductivity imaging.

Purpose of the Study:

• To investigate a magnetic field measurement technique for imaging biological tissue electrical conductivity.
• To develop and validate a novel coil configuration for enhanced signal detection.

Main Methods:

• Analytical investigation of field equations and derivation of partial differential equations.
• Numerical simulations using finite element method with a 16-element linear phased array transducer.
• Sensitivity matrix analysis and image reconstruction using truncated singular value decomposition (SVD).

Main Results:

• A novel xy coil pair configuration was proposed for sensing pick-up voltages.
• The technique demonstrated the capability to detect perturbations of 2 mm size up to 3.5 cm depth.
• Singular value decomposition analysis characterized the imaging system's performance.

Conclusions:

• The proposed magnetic field measurement technique is feasible for imaging electrical conductivity in biological tissues.
• The novel xy coil pair and SVD-based reconstruction show promise for sensitive conductivity imaging.
• This method holds potential for non-invasive diagnostic applications in medical imaging.