Method and system for MRI with lipid suppression
AssigneeGeneral Electric Company
InventorsWilliam Thomas Dixon, Christopher Judson Hardy
Life of this patent
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Abstract
A method and system are provided for acquiring images with water and lipid separation using a magnetic resonance imaging (MRI) system comprising applying a plurality of steady-state free precession (SSFP) radio-frequency (RF) excitation pulses to discriminate lipids from water, the pulses having respective inter-pulse gaps between the pulses, the inter-pulse gaps varying among different widths.
Claims13
A method for acquiring images with water and lipid separation using a magnetic resonance imaging (MRI) system, the method comprising:
- applying a plurality of steady-state free precession (SSFP) radio-frequency (RF) excitation pulses having respective inter-pulse gaps between the pulses to discriminate lipids from water, the plurality of pulses alternating between a first repetition time and a second repetition time greater than the first repetition time to obtain the inter-pulse gaps that vary among different widths and wherein the second repetition time is modulated up and down to achieve a broad null region about fat resonance to attenuate signals attributed to the lipids.
A system for Magnetic Resonance Imaging (MRI) for acquiring images of an object comprising:
- a magnetic field driver for driving a field gradient;
- a magnetic field controller for controlling the magnetic field;
- a transmitter for generating an radio frequency (RF) pulse to cause resonance and wherein the transmitter is adapted to generate a plurality of steady-state free precession (SSFP) radio-frequency excitation pulses having respective inter-pulse gaps between the pulses to discriminate lipids from water, the plurality of pulses alternating between a first repetition time and a second repetition time greater than the first repetition time to obtain the inter-pulse gaps that vary among different widths and wherein the second repetition time is modulated up and down to achieve a broad null region about fat resonance to attenuate signals attributed to the lipids;
- a receiver for receiving and detecting magnetic resonance signals generated from the object;
- and,
- a processor for performing image reconstruction and for generating images for display.
A method for acquiring images with water and lipid separation using a magnetic resonance imaging (MRI) system, the method comprising:
- applying a plurality of steady-state free precession (SSFP) radio-frequency (RF) excitation pulses, the plurality of pulses alternating between a first repetition time and a second repetition time greater than the first repetition time to generate respective inter-pulse gaps between the pulses to discriminate lipids from water, the inter-pulse gaps alternating between a first width and a second width and wherein the second repetition time is modulated up and down to achieve a broad null region about fat resonance to attenuate signals attributed to the lipids.
Dependencies are inferred from the claim text.