Backgorund: Non-invasive magnetic imaging techniques are necessary to assist assist magnetic nanoparticles biomedical applications, mainly detecting their distribution inside the body. In Alternating Current Biosusceptometry (ACB), the magnetic nanoparticles magnetization response under an oscillating magnetic field, which is applied through an excitation coil, is detected with a balanced detection coil system.
Results: We built a Multi-Channel ACB system (MC-ACB) containing nineteen pick-up coils and obtained 2D quantitative images of magnetic nanoparticles distributions by solving an inverse problem. We reconstructed the magnetic nanoparticles spatial distributions in a field of view of 14×14 cm² with a spatial resolution of 2.0 cm and sensitivity in the milligram scale. A correlation coefficient between quantitative reconstructed and nominal magnetic nanoparticles distributions above 0.6 was found for all measurements.
Conclusion: Besides other interesting features such as sufficient large field of view dimension for mice and rat studies, portability, and the ability to assess the quantitative magnetic nanoparticles distributions in real-time, the MC-ACB system is a promising tool for quantitative imaging of magnetic nanoparticles distributions in real-time, offering an affordable setup for easy access in clinical or laboratory environments.