2D Images Recorded With a Single-Sided Magnetic Particle Imaging Scanner

Area of Science:

• Medical Imaging
• Biomedical Engineering
• Nanotechnology

Background:

• Magnetic Particle Imaging (MPI) detects superparamagnetic iron oxide nanoparticles using magnetic fields.
• Conventional MPI scanners have limited field of view and object size due to their tube-like measurement fields.
• Single-sided MPI scanners offer advantages by removing object size limitations, focusing on penetration depth.

Purpose of the Study:

• To present the first 2D single-sided scanner prototype for Magnetic Particle Imaging.
• To demonstrate the feasibility of 2D imaging with a single-sided MPI system.
• To evaluate the performance of the prototype in reconstructing 2D phantom images.

Main Methods:

• Developed a 2D single-sided scanner prototype for MPI.
• Utilized a field-free point moved on a Lissajous trajectory within a 30 × 30 mm² area.
• Reconstructed images from 2D phantoms containing Resovist nanoparticles, with measurements up to 10 mm perpendicular to the scanner surface.

Main Results:

• Successfully reconstructed 2D phantom images using calibration-based methods.
• Achieved distinction of particle volumes at 2 mm (vertical) and 6 mm (horizontal) distances.
• Demonstrated the capability of the 2D single-sided scanner to image objects with depth.

Conclusions:

• The presented 2D single-sided MPI scanner prototype is functional and capable of reconstructing 2D images.
• This technology overcomes the size constraints of conventional MPI scanners.
• The results show promise for imaging larger biological samples or organs in future MPI applications.