High-resolution optically-detected magnetic resonance imaging in an ambient magnetic field

High-resolution optically-detected magnetic resonance imaging in an ambient magnetic field

[Display omitted] •A zoom-in method to achieve high spatial resolution for ultralow-field MRI.•Sub-millimeter spatial resolution for both in-plane axes in ambient magnetic field.•A unique gradient solenoid to improve the filling factor of optical detection. Magnetic resonance imaging (MRI) in an ult...

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Bibliographic Details
Published in:Journal of magnetic resonance (1997) Vol. 233; pp. 1 - 6
Main Authors: Ruangchaithaweesuk, Songtham, Chintamsetti, Vasudeva, Yao, Li, Tsai, Te-Wei, Xu, Shoujun
Format: Journal Article
Language:English
Published: United States Elsevier Inc 01-08-2013
Subjects:
Atomic magnetometry
Concomitant field effect
Encoding
Filling factor
Imaging
Level (quantity)
Magnetic fields
Magnetic resonance
Magnetic resonance imaging
Optical detection
Solenoids
Spatial resolution
Ultralow-field MRI
Zoom-in method
Concomitant field effect
Optical detection
Zoom-in method
Filling factor
Atomic magnetometry
Ultralow-field MRI
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Summary:[Display omitted] •A zoom-in method to achieve high spatial resolution for ultralow-field MRI.•Sub-millimeter spatial resolution for both in-plane axes in ambient magnetic field.•A unique gradient solenoid to improve the filling factor of optical detection. Magnetic resonance imaging (MRI) in an ultralow magnetic field usually has poor spatial resolution compared to its high-field counterpart. The concomitant field effect and low signal level are among the major causes that limit the spatial resolution. Here, we report a novel imaging method, a zoom-in scheme, to achieve a reasonably high spatial resolution of 0.6mm×0.6mm without suffering the concomitant field effect. This method involves multiple steps of spatial encoding with gradually increased spatial resolution but reduced field-of-view. This method takes advantage of the mobility of ultralow-field MRI and the large physical size of the ambient magnetic field. We also demonstrate the use of a unique gradient solenoid to improve the efficiency of optical detection with an atomic magnetometer. The enhanced filling factor improved the signal level and consequently facilitated an improved spatial resolution.
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ISSN:1090-7807
1096-0856
DOI:10.1016/j.jmr.2013.05.001