A System Function Swapping Stitching Imaging Method Based on Cartesian Trajectory in Magnetic Particle Imaging.

Area of Science:

• Medical Imaging
• Biomedical Engineering
• Physics

Background:

• Magnetic Particle Imaging (MPI) is a sensitive medical imaging technique.
• Current System Matrix (SM) reconstruction methods have limitations due to scanning trajectories.
• Optimizing trajectories and reconstruction is crucial for MPI performance.

Purpose of the Study:

• To introduce a novel reconstruction method for MPI.
• To address limitations of existing trajectories in System Matrix reconstruction.
• To demonstrate the invariance of the system function under a specific trajectory.

Main Methods:

• Developed a Swapping Stitching SM (SSSM) reconstruction method.
• Utilized a unidirectional Cartesian trajectory for MPI.
• Demonstrated system function invariance under the Field-Free Point (FFP) Cartesian trajectory.

Main Results:

• The SSSM method maintains the high sensitivity of Cartesian trajectories.
• Achieved isotropic imaging capabilities with the proposed method.
• Eliminated the need for multiple SM calibrations, requiring only a single calibration.

Conclusions:

• The SSSM method offers an improved approach to MPI reconstruction.
• Unidirectional Cartesian trajectories combined with SSSM enhance imaging performance.
• This method simplifies calibration and maintains high sensitivity in MPI.