NMR spectroscopy and NMR imaging
AssigneeNational Research Development Corporation
InventorRoger J. Ordidge
Life of this patent
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Abstract
Undesired signals are eliminated using a shaped RF pulse comprising a region of random frequency components and a region of zero components to effectively eliminate signals from areas volumes or frequency bands which are not required.
Claims10
A method of eliminating NMR signals from unwanted frequency bands in NMR systems comprising (a) providing a shaped RF pulse comprising at least two regions of frequency bands of random frequency components between which at least one frequency band region of zero components is situated and (b) detecting the NMR signal output from the frequency band region of zero components.
A method of accurate definition of a desired volume of material in NMR systems within a large sample by removal of unwanted signal comprising (a) applying a shaped RF pulse in conjunction with a linear magnetic field gradient which effectively randomizes the net longitudinal spin magnetization in all volumes outside the selected volume and (b) detecting the NMR signal output from the selected volume.
Dependencies are inferred from the claim text.