Very low-field (0.05T) MR repeatability data

Description

Very low-field MR has emerged as a promising alternative to high-field MRI scanners, offering several advantages. The major benefits are that very low-field scanner are portable and affordability and low maintenance. However, challenges remain in integrating very low-field MRI into clinical practice and ensuring their widespread adoption in both high and low-resource settings. Some of the limitations include lower signal-to-noise ratio (SNR), low spatial resolution, and long scan time. Also, these systems are susceptible to environmental factors such as temperature, humidity, electromagnetic interference (EMI) and magnetic field inhomogeneity, and gradient heating. The repeatability data was acquired on in vitro phantom (ProMRI, ProProject, USA) at 0.05T from MultiWave Technologies, France. The data was collected over 10 days (folders D1 to D10) with each folder containing 3 subfolders for 3 sessions (S1 to S3). Each session had a 3D TSE folder and two off-resonance (ΔB0) maps (before and after 3D TSE). The B0 folder had two 3D TSE sequences with an echo shift of 49μs between them. The Findf0 folder had f0 measurements before and after each scan to evaluate the effect of frequency drift on the image. We have also included phantom data acquired using Siemens 3T Skyra scanner with a 20-channel head and neck coil.

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