Projection Imaging

Projection Magnetic Particle Imaging System
Projection MPI System Photo. The system includes a permanent magnet FFL selection gradient, inductive drive and focus field electromagnets, and a solenoidal receive coil.

Projection MPI Angiography Phantom
Projection MPI Angiography Phantom Design. This phantom design was created in an acrylic phantom injected with Resovist.

MPI Experimental Projection Image
Experimental Image from Projection MPI System. The above phantom was imaged in our projection MPI system.


Goodwill, P. W., Konkle, J. J., Zheng, B., Saritas, E. U., & Conolly, S. M. (2012). Projection x-space magnetic particle imaging. IEEE Transactions on Medical Imaging, 31(5), 1076–85. doi:10.1109/TMI.2012.2185247 Link

Abstract: Projection magnetic particle imaging (MPI) can improve imaging speed by over 100-fold over traditional 3-D MPI. In this work, we derive the 2-D x-space signal equation, 2-D image equation, and introduce the concept of signal fading and resolution loss for a projection MPI imager. We then describe the design and construction of an x-space projection MPI scanner with a field gradient of 2.35 T/m across a 10 cm magnet free bore. The system has an expected resolution of 3.5 × 8.0 mm using Resovist tracer, and an experimental resolution of 3.8 × 8.4 mm resolution. The system images 2.5 cm × 5.0 cm partial field-of views (FOVs) at 10 frames/s, and acquires a full field-of-view of 10 cm × 5.0 cm in 4 s. We conclude by imaging a resolution phantom, a complex “Cal” phantom, mice injected with Resovist tracer, and experimentally confirm the theoretically predicted x-space spatial resolution.


Konkle, J., Goodwill, P., & Conolly, S. (2011). Projection Magnetic Particle Imaging for Improved Speed. Proceedings of WMIC. Link