Electrical Properties Tomography Based on $B_{{1}}$ Maps in MRI: Principles, Applications, and Challenges

Area of Science:

• Biomedical Imaging
• Medical Physics

Background:

• Magnetic Resonance Imaging (MRI) poses risks of tissue heating at high fields.
• Accurate estimation of specific absorption rate (SAR) is crucial for MRI safety.

Purpose of the Study:

• To provide a comprehensive review of Electrical Properties Tomography (EPT).
• To discuss EPT's principle, reconstruction methods, and biomedical applications.
• To highlight EPT's role in subject-specific SAR estimation for MRI.

Main Methods:

• Review of EPT principles and reconstruction algorithms.
• Analysis of biomedical applications, including tumor imaging.
• Discussion of EPT-based specific absorption rate (SAR) estimation.

Main Results:

• Advanced EPT algorithms address challenges like noise and boundary errors.
• EPT successfully images in vivo electrical properties of healthy and pathological tissues.
• EPT-based SAR estimation demonstrates feasibility for predicting MRI-induced tissue heating.

Conclusions:

• EPT offers high-resolution, clinically feasible imaging of tissue electrical properties.
• EPT-based SAR estimation is a promising tool for personalized MRI safety.