[A detection method of liver iron overload based on static field magnetization principle]

Area of Science:

• Biomedical Engineering
• Medical Physics
• Diagnostic Imaging

Background:

• Liver iron overload is a condition requiring accurate, noninvasive monitoring.
• Current magnetic induction methods for hepatic magnetic susceptibility face interference from eddy currents.
• Effective measurement of magnetic susceptibility is crucial for diagnosing liver iron overload.

Purpose of the Study:

• To develop an improved magnetic induction coil system to overcome eddy current interference.
• To enable accurate noninvasive measurement of hepatic magnetic susceptibility for liver iron overload detection.
• To validate the efficacy of the proposed method through simulations and theoretical comparisons.

Main Methods:

• Implemented a novel coil system utilizing direct current excitation to eliminate eddy current effects.
• Employed a rotary receiver coil to measure induced voltage.
• Calculated magnetic fields and derived relative changes in induced voltage for cylindrical objects.
• Conducted simulation experiments to correlate magnetic susceptibility with magnetic flux and induced voltage.

Main Results:

• The improved coil system effectively eliminated eddy current interference.
• Simulation results demonstrated a strong correlation between hepatic magnetic susceptibility and measured voltage changes.
• Simulation outcomes closely matched theoretical calculations, validating the method's accuracy.

Conclusions:

• The proposed magnetic induction method with an improved coil system effectively eliminates eddy current effects.
• This technique offers a promising approach for accurate, noninvasive assessment of liver iron overload.
• The findings support the clinical application of this method for diagnosing and monitoring iron metabolism disorders.