System and method for tissue characterization using multislice magnetic resonance imaging
AssigneeBeth Israel Deaconess Medical Center, Inc.
InventorsSebastian Weingartner, Reza Nezafat
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Abstract
An MRI method includes: performing a first data acquisition block of a pulse sequence to acquire a first MR data from a plurality of slices of a subject during a period of fully recovered longitudinal magnetization within the plurality of slices disposed at different locations in the subject; performing a second data acquisition block of the pulse sequence including a magnetization preparation module followed by a recovery period and an imaging sequence executed during the recovery period, to acquire a second MR data from the plurality of slices during the recovery period; and generating a T1 map of the subject based on the first MR data and the second MR data, of the plurality of slices.
Claims23
A magnetic resonance imaging (MRI) method comprising:
- performing, by an MRI apparatus, a first data acquisition block of a pulse sequence including a first imaging sequence, which includes first sets of slice-selective excitation pulses, to acquire a first magnetic resonance (MR) data from a plurality of slices of a subject during a period of fully recovered longitudinal magnetization within the plurality of slices disposed at different locations in the subject, wherein the performing the first data acquisition block includes executing each of the first sets of the slice-selective, excitation pulses to individually excite, in one cardiac cycle of the subject, among cardiac cycles, each single slice of the plurality of slices once;
- performing, by the MRI apparatus, a second data acquisition block of the pulse sequence that includes a magnetization preparation module and a second imaging sequence, which includes second sets of slice-selective excitation pulses and is executed during a recovery period following the magnetization preparation module, to acquire a second MR data from the plurality of slices during the recovery period, wherein the performing the second data acquisition block includes executing each of the second sets of the slice-selective excitation pulses to individually excite, in one cardiac cycle of the subject, among the cardiac cycles, each single slice of the plurality of slices once after the magnetization preparation module is executed;
- and
- generating, by the MRI apparatus, a longitudinal relaxation time (T1) map of the subject based on the first MR data and the second MR data, of the plurality of slices.
A magnetic resonance imaging (MRI) apparatus comprising:
- a data processor configured to acquire a first magnetic resonance (MR) data and a second MR data, from a plurality of slices disposed in different locations in a subject;
- a pulse sequence controller configured to generate a pulse sequence and apply the pulse sequence to a gradient coil assembly and an RF coil assembly,
- wherein the pulse sequence controller is further configured to execute a first data acquisition block of the pulse sequence, the first data acquisition block including a first imaging sequence including first sets of slice-selective excitation pulses, to acquire the first MR data from the plurality of slices during a period of fully recovered longitudinal magnetization within the plurality of slices, and to execute a second data acquisition block of the pulse sequence, the second data acquisition block including a magnetization preparation module and a second imaging sequence, which includes second sets of slice-selective excitation pulses and is executed during a recovery period following the magnetization preparation module, to acquire the second MR data from the plurality of slices during the recovery period,
- wherein the pulse sequence controller is further configured to execute each of the first sets of the slice-selective excitation pulse to individually excite, in one cardiac cycle of the subject, among cardiac cycles, each single slice of the plurality of slices once, and to execute each of the second sets of the slice-selective excitation pulses to individually excite, in one cardiac cycle of the subject, among the cardiac cycles, each single slice of the plurality of slices once after the magnetization preparation module is executed;
- and
- an image processor configured to generate a longitudinal relaxation time (T1) map of the subject, for the plurality of slices, based on the first MR data and the second MR data.
Dependencies are inferred from the claim text.