Sub-millimetric ultra-low-field MRI detected in situ by a dressed atomic magnetometer
arXiv:1908.01283 · doi:10.1063/1.5123653
Abstract
Magnetic Resonance Imaging (MRI) is universally acknowledged as an excellent tool to extract detailed spatial information with minimally invasive measurements. Efforts toward ultra-low-field (ULF) MRI are made to simplify the scanners and to reduce artefacts and incompatibilities. Optical Atomic Magnetometers (OAMs) are among the sensitive magnetic detectors eligible for ULF operation, however they are not compatible with the strong field gradients used in MRI. We show that a magnetic-dressing technique restores the OAMs operability despite the gradient, and we demonstrate sub-millimetric resolution MRI with a compact experimental setup based on an in situ detection. The proof-of-concept experiment produces unidimensional imaging of remotely magnetized samples with a dual sensor, but the approach is suited to be adapted for 3-D imaging of samples magnetized in loco. An extension to multi-sensor architectures is also possible.
arXiv comment5 pages, 3 figures, 36 refs, 3 pages supplemental material (+ 3refs). Accepted for publication in Appl.Phys.Lett
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Cited by in corpus (8)
- How to build a magnetometer with thermal atomic vapor: A tutorial
- Harmonic fine tuning and triaxial spatial anisotropy of dressed atomic spins
- Magnetic Induction Imaging with a cold-atom radio-frequency magnetometer
- Spin dynamic response to a time dependent field
- Ferromagnetic contamination of Ultra-Low-Field-NMR sample containers. Quantification of the problem and possible solutions
- Multipassage Landau-Zener tunneling oscillations in transverse/longitudinal dual dressing of atomic qubits
- Fast switching coil system for sample premagnetization in an unshielded ultra-low-field Nuclear Magnetic Resonance experiment
- Studying and applying magnetic dressing with a Bell and Bloom magnetometer