Densely packed resonant structures used for magnetic resonance imaging (MRI), such as nuclear magnetic resonance phased array detectors, suffer from resonant inductive coupling, which restricts the coil design to fixed geometries, imposes performance limitations and narrows the scope of MRI experiments to motionless subjects. Here, we report the design of high-impedance detectors, and the fabrication and performance of a wearable detector array for MRI of the hand, that cloak themselves from electrodynamic interactions with neighbouring elements. We experimentally verified that the detectors do not suffer from the signal-to-noise degradation mechanisms typically observed with the use of traditional low-impedance elements. The detectors are adaptive and can accommodate movement, providing access to the imaging of soft-tissue biomechanics with unprecedented flexibility. The design of the wearable detector glove exemplifies the potential of high-impedance detectors in enabling a wide range of applications that are not well suited to traditional coil designs.
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This work was performed under the rubric of the Center for Advanced Imaging Innovation and Research (www.cai2r.net), a NIBIB Biomedical Technology Resource Center (NIH P41 EB017183). We thank R. Brown for critically reading the manuscript, M. Vester for many valuable discussions and Z. Yu for help during the experiments.
NYU has filed provisional patent applications directed to this technology.
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Zhang, B., Sodickson, D.K. & Cloos, M.A. A high-impedance detector-array glove for magnetic resonance imaging of the hand. Nat Biomed Eng 2, 570–577 (2018). https://doi.org/10.1038/s41551-018-0233-y
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