Magnetic resonance imaging with short echo times
AssigneeKoninklijke Philips Electronics N.V.
InventorWayne R. Dannels
Life of this patent
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Abstract
In a magnetic resonance imaging method, inner radial readout lines (100, 200, 300, 400) in an inner portion (102, 202, 302, 402) of k-space are acquired using a first readout magnetic field gradient profile (120, 220, 320, 420). Outer radial readout lines (104, 204, 304, 404) in an outer portion (106, 206, 306, 406) of k-space disposed substantially outside of the inner portion of k-space are acquired using a second readout magnetic field gradient profile (124, 224, 324, 424) different from the first readout magnetic field gradient profile. The acquired inner and outer radial readout lines are reconstructed to produce a reconstructed image.
Claims22
A magnetic resonance imaging method comprising:
- applying a plurality of first radio frequency excitations;
- acquiring inner radial readout lines in an inner portion of k-space using a first readout magnetic field gradient profile, each first radio frequency excitation being followed by the acquiring of one of the inner radial readout lines;
- applying a plurality of second radio frequency excitations;
- acquiring outer radial readout lines in an outer portion of k-space disposed substantially outside of the inner portion of k-space using a second readout magnetic field gradient profile different from the first readout magnetic field gradient profile, each second radio frequency excitation being followed by the acquiring of one of the outer radial readout lines, wherein the number of outer radial readout lines is substantially larger than the number of inner radial readout lines;
- and
- reconstructing the acquired inner and outer radial readout lines to produce a reconstructed image.
A magnetic resonance imaging method comprising:
- applying a plurality of first radio frequency excitations wherein the first radio frequency excitations are three-dimensional excitations;
- acquiring inner radial readout lines in an inner portion of k-space using a first readout magnetic field gradient profile, each first radio frequency excitation being followed by the acquiring of one of the inner radial readout lines;
- applying a plurality of second radio frequency excitations wherein the second radio frequency excitations are two-dimensional excitations;
- acquiring outer radial readout lines in an outer portion of k-space disposed substantially outside of the inner portion of k-space using a second readout magnetic field gradient profile different from the first readout magnetic field gradient profile, each second radio frequency excitation being followed by the acquiring of one of the outer radial readout lines;
- and
- reconstructing the acquired inner and outer radial readout lines to produce a reconstructed image.
Dependencies are inferred from the claim text.