Fat suppression by combining fat saturation with fat inversion
AssigneeSiemens Healthcare GmbH
InventorWolfgang G. Rehwald
Life of this patent
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Abstract
A method of fat suppression during magnetic resonance imaging includes applying a fat suppression module to a region of interest within a subject. The fat suppression module comprises a fat-selective saturation pulse; a first spoiler gradient applied following the fat-selective saturation pulse; a fat-selective inversion pulse applied to the region of interest following a time delay; and a second spoiler gradient applied following the fat-selective inversion pulse. The time delay is selected to allow T1 recovery in the region of interest to a predetermined level of fat magnetization at the end of the time delay. Following application of the fat suppression module, a sequence readout is performed to acquire one or more lines of k-space data covering the region of interest.
Claims20
A method of fat suppression during magnetic resonance imaging, the method comprising:
- applying a fat suppression module to a region of interest within a subject, the fat suppression module comprising:
- a fat-selective saturation pulse;
- a first spoiler gradient applied following the fat-selective saturation pulse;
- a fat-selective inversion pulse applied to the region of interest following a time delay, wherein the time delay is selected to allow T1 recovery in the region of interest to a predetermined level of fat magnetization at the end of the time delay;
- a second spoiler gradient applied following the fat-selective inversion pulse;
- following application of the fat suppression module, performing a sequence readout to acquire one or more lines of k-space data covering the region of interest.
A method of fat suppression during magnetic resonance imaging, the method comprising:
- applying a fat suppression module to a region of interest within a subject, the fat suppression module comprising:
- a series of fat-selective saturation pulses, wherein a first spoiler gradient is applied to the region of interest following each fat-selective saturation pulse;
- a time delay starting and the end of the series of fat-selective saturation pulses, wherein the time delay is selected to allow T1 recovery in the region of interest to a predetermined level of fat magnetization at the end of the time delay;
- a fat-selective inversion pulse applied to the region of interest following the time delay;
- and
- a second spoiler gradient applied following the fat-selective inversion pulse;
- following application of the fat suppression module, acquiring one or more lines of k-space data covering the region of interest.
A system for fat suppression during magnetic resonance imaging, the system comprising:
- an imaging device comprising a plurality of coils;
- one or more processors;
- and
- a non-transitory, computer-readable storage medium in operable communication with the processor, wherein the computer-readable storage medium contains one or more programming instructions that, when executed, cause the processors to:
- apply a fat suppression module to a region of interest within a subject using the coils, the fat suppression module comprising:
- one or more fat-selective saturation pulses;
- a first spoiler gradient applied following each fat-selective saturation pulse;
- a fat-selective inversion pulse applied to the region of interest following a time delay, wherein the time delay is selected to allow T1 recovery in the region of interest to a predetermined level of fat magnetization at the end of the time delay;
- a second spoiler gradient applied following the fat-selective inversion pulse;
- following application of the fat suppression module, use the plurality of coils to acquire one or more lines of k-space data covering the region of interest.
Dependencies are inferred from the claim text.