SPIRIT
Spherical multiParameter Imaging Reference for Instrument Testing
The ultimate MRI QA phantom for comprehensive scanner validation
SPIRIT is a cutting-edge MRI Quality Assurance (QA) phantom designed to streamline scanner validation, quantitative MRI (qMRI) accuracy checks, and spatial distortion assessments. Developed with input from leading MRI physicists and engineered for seamless integration, SPIRIT is the essential tool for medical institutions, research facilities, and imaging centres.
Why SPIRIT?
Modern MRI scanners require rigorous quality assurance to ensure accurate quantitative measurements and spatial fidelity. SPIRIT combines NIST-calibrated relaxometry and diffusion measurements with advanced geometric features in a single, spherical phantom optimised for homogeneous field imaging and repeatable positioning.
Multi-Parametric Testing in One Device
SPIRIT combines NIST-calibrated, SI-traceable T1, T2, and ADC vials with geometrical features, enabling comprehensive MRI scanner QA in a single phantom.
Advanced Slice Thickness & Distortion Measurement
Equipped with precision-crossed wedges at the centre of the phantom, SPIRIT provides highly accurate slice profile analysis adhering to NEMA MS 5-2018 standards.
Optimised for Homogeneous Field Imaging
A spherical design ensures superior shimming, minimising field inhomogeneities for consistent and reliable results across all measurements.
Versatile Multi-Location Sampling
Identical T1/T2 values are distributed across multiple locations, allowing easy detection of B1 and B0 field variations throughout the imaging volume.
Custom-Tuned for Brain Imaging QA
The phantom chamber contains a liquid formulation for optimal background signal, magnetic susceptibility matching, and coil loading similar to brain imaging.
Highly Visible Fiducials for Spatial Accuracy
Using 52 MR visible fiducials arranged in a rectilinear Cartesian grid, SPIRIT enables precise spatial distortion analysis and geometric accuracy assessment.
Testing MRI Resolution
A 0.5 to 3.0 mm resolution grid, repeated in multiple orientations, assesses the ability of image acquisitions to resolve fine details.
Seamless Compatibility with Major MRI Systems
Designed for universal use, SPIRIT fits into most MRI manufacturers' head coils and integrates into standard MRI workflows.
Robust & Reproducible Placement
A dedicated holder ensures consistent positioning within MRI head coils for repeatable, high-precision testing.
Ready for Future-Proof Imaging
Includes advanced software for automated slice profile analysis, spatial distortion mapping, and signal level extraction (work in progress).
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