NMR tomography method based on NBSEM with 2D spatial...

Details NMR tomography method based on NBSEM with 2D spatial... NMR tomography method based on NBSEM with 2D spatial...

2011-03-15

2011-03-15

Arana, Louis M (Department: 2858)

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

C324S319000

Reexamination Certificate

active

07906968

ABSTRACT:
A nuclear magnetic resonance (NMR) imaging method in which, with the aid of a gradient system, a spatially and temporally variable magnetic field Bgradis generated, for the at least two-dimensional spatial encoding of NMR measurement signals in a measurement sample region to be imaged, where the magnetic field Bgradis employed in at least two forms Bgrad1and Bgrad2in the measurement sample region to be imaged during a single measurement cycle from excitation to reading of the NMR measurement signals, where the first form Bgrad1has essentially ns poles, where ns is an even number > 2, and has ns essentially sectorial sub-regions, in each of which the magnetic field Bgradis locally monotonic in one direction, where the measurement signals from the measurement sample are recorded by means of at least ns receiver coils which have different sensitivity over the ns sub-regions of the region to be imaged, is characterized in that the second form Bgrad2is essentially identical to the first form Bgrad1% with the second form Bgrad2being rotated by an angle Δφ, whereΔ⁢⁢φ=360⁢°2·n⁢⁢s,relative to the first form Bgrad1.The invention provides an NMR imaging method in which a high-resolution image of the region to be imaged is obtained more quickly utilizing the advantages of NBSEMs.

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