Customer Success Stories

Dynamic Field Camera

ETH Zurich and University of Zurich

Institute for Biomedical Engineering 

Eric Michael

Oscillating gradient spin-echo (OGSE) diffusion acquisitions offer unique microstructural insight but suffer limited sensitivity due to the characteristically long TEs. This shortcoming can be mitigated by combining OGSE with spiral readouts. This development was made practically feasible by field monitoring, which allowed us to measure field dynamics inherent to the spiral trajectory and diffusion encoding gradients and reconstruct accurate images.

University of Leeds

Dr. Lars Mueller, PhD​

I am working on acquiring fully sampled low-res spiral pre-scans for my spiral sequence. To estimate B0-maps, I use a dual echo readout (2 spiral out trajectories) with a rephasing lobe between the echoes. I saw that one of the axes was not rephased in my initial imaging experiments [panel A]. This was due to an error in calculating the rephasing moment which I missed in the sequence simulation. Being able to directly visualize the gradient moments made it easy to identify the error and fix the calculation in the pulse sequence [panel B].

Clip-on Camera

Western University

Department of Medical Biophysics

Paul Dubovan

7T | open-source Skope Data Reader

Image reconstructions informed by field monitoring data require sub-microsecond synchronization between the MRI data and field dynamics to produce accurate, artifact-free images. To accurately synchronize this data, we introduced a new model-based algorithm that accurately determines this delay by iterating between convex optimizations for the image and the synchronization delay. Having access to the raw trajectory data from the Skope system and libraries with which to read them allowed us to successfully develop our model-based reconstruction algorithm and generate high-fidelity images.