In this thesis the candidate proposes some technical and fundamental advances for NMR and MRI measurements in the ultra-low field (ULF) regime executed with optical-atomic-magnetometers (OAMs). This regime corresponds to field intensities such to make the nuclei precess at frequencies as low as tens/hundreds Hz. A self-optimized compensation system reduces the magnetic disturbances so to make the magnetometer suited to detect those ULF signals in an unshielded environment. The magnetometer is exploited as a high-sensitivity non-inductive sensor for ULF-NMR signal detection. Besides application in ULF-NMR spectroscopy, the simultaneous analysis of nuclear and atomic precession is used in a novel hybrid setup, which enables the detection of diluted magnetic contaminants. As predominant result an inhomogeneous-magnetic-dressing based (IDEA) technique has been devised enabling the first in-situ ULF-MRI detection by OAMs with sub-millimetric resolution.

Vigilante, A. (2019). Advances in Atomic Magnetometry for Ultra-Low-Field NMR and MRI.

Advances in Atomic Magnetometry for Ultra-Low-Field NMR and MRI

Antonio Vigilante
2019-01-01

Abstract

In this thesis the candidate proposes some technical and fundamental advances for NMR and MRI measurements in the ultra-low field (ULF) regime executed with optical-atomic-magnetometers (OAMs). This regime corresponds to field intensities such to make the nuclei precess at frequencies as low as tens/hundreds Hz. A self-optimized compensation system reduces the magnetic disturbances so to make the magnetometer suited to detect those ULF signals in an unshielded environment. The magnetometer is exploited as a high-sensitivity non-inductive sensor for ULF-NMR signal detection. Besides application in ULF-NMR spectroscopy, the simultaneous analysis of nuclear and atomic precession is used in a novel hybrid setup, which enables the detection of diluted magnetic contaminants. As predominant result an inhomogeneous-magnetic-dressing based (IDEA) technique has been devised enabling the first in-situ ULF-MRI detection by OAMs with sub-millimetric resolution.
2019
BIANCALANA, VALERIO
Vigilante, A. (2019). Advances in Atomic Magnetometry for Ultra-Low-Field NMR and MRI.
Vigilante, Antonio
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/1087368
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