ArticleMagma (New York, N.Y.)2026
Towards an anthropomorphic MRI phantom mimicking static and dynamic B
Article in Magma (New York, N.Y.), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Authors and funding
6 authors.
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Abstract
objectiveSpinal cord MRI is heavily affected by static and dynamic B MATERIALS AND
methodsThe phantom consisted of a 3D-printed head-to-thorax shell containing 3D-printed vertebrae (C1-T1) in a water-based liquid solution. An external respiration system mimicked breathing-induced field fluctuations by moving metal staples over the phantom. The accuracy of the reproduced fields was evaluated at 7 T by field maps and multi-echo GREs acquired in the phantom and in four subjects.
resultsFourier-based field simulations confirmed the vertebrae to be the main contributors to the local static field in the spinal canal, providing a rationale for the phantom design. The 3D-printed vertebrae accurately reproduced the spatial field pattern encountered in vivo, but with one-third of the intensity due to lower susceptibility differences. The respiration system produced spatially and temporally similar dynamic field fluctuations as in vivo. DISCUSSION: The phantom was designed to be low-cost, modular and reproducible, while also being non-toxic and free from biological hazards. It may serve as a useful tool for development and testing of correction strategies to address the persistent challenge of B
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