Magnetic resonance imaging apparatus and magnetic resonance imaging method
First Claim
1. A magnetic resonance imaging (MRI) apparatus comprising:
- at least one radio frequency (RF) coil disposed within static and gradient magnetic field generators, an RF transmitter and an RF receiver coupled to said at least one RE coil, and at least one control computer connected to control said gradient magnetic field generators, said RF transmitter, said RF transmitter and said RF receiver to execute MRI data acquisition sequences and to process acquired MRI signals;
said at least one control computer being configured toacquire first and second magnetic resonance signals from a flowing fluid within same imaging area of an object using at least one inversion recovery pulse related to a MR relaxation time of a flowing fluid within the object, the first magnetic resonance signals, from the fluid including negative values, the second magnetic resonance signals from the fluid including positive values, andgenerate first and second image data based, respectively, on the first and second magnetic resonance signals, the first image data depicting the fluid as a lower signal region than a signal region of surrounding tissue, the second image data depicting the fluid as a higher signal region than a signal region of the surrounding tissue;
the first image data being generated with a phase correction based on the second magnetic resonance signals.
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Accused Products
Abstract
According to one embodiment, an MRI apparatus includes a data acquiring part and a data processing part. The data acquiring part acquires first and second MR signals by applying at least one IR pulse under an application condition according to a relaxation time of a fluid. The first MR signals include MR signals, having negative values, from the fluid. The second MR signals include MR signals, having positive values, from the fluid. The data processing part generates first and second image data. The first image data depict the fluid as a lower signal region than that of a tissue. The second image data depict the fluid as a higher signal region than that of the tissue. The data processing part generates the first image data with a phase correction based on the second MR signals.
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Citations
21 Claims
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1. A magnetic resonance imaging (MRI) apparatus comprising:
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at least one radio frequency (RF) coil disposed within static and gradient magnetic field generators, an RF transmitter and an RF receiver coupled to said at least one RE coil, and at least one control computer connected to control said gradient magnetic field generators, said RF transmitter, said RF transmitter and said RF receiver to execute MRI data acquisition sequences and to process acquired MRI signals;
said at least one control computer being configured toacquire first and second magnetic resonance signals from a flowing fluid within same imaging area of an object using at least one inversion recovery pulse related to a MR relaxation time of a flowing fluid within the object, the first magnetic resonance signals, from the fluid including negative values, the second magnetic resonance signals from the fluid including positive values, and generate first and second image data based, respectively, on the first and second magnetic resonance signals, the first image data depicting the fluid as a lower signal region than a signal region of surrounding tissue, the second image data depicting the fluid as a higher signal region than a signal region of the surrounding tissue; the first image data being generated with a phase correction based on the second magnetic resonance signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. The magnetic resonance imaging (MRI) apparatus comprising:
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at least one radio frequency (RF) coil disposed within static and gradient magnetic field generators, an RE transmitter and an RF receiver coupled to said at least one RF coil, and at least one control computer connected to control said gradient magnetic field generators, said RF transmitter, said RF transmitter and said RF receiver to execute MRI data acquisition sequences and to process acquired MRI signals;
said at least one control computer being configured toacquire magnetic resonance signals from an imaging area of an object by applying at least one inversion recovery pulse related to relaxation times of a first component to be a suppression target and a second component to be a weighted target, the magnetic resonance signals including signals, having negative values, from the first component and signals, having positive values, from the second component, the magnetic resonance signals corresponding to an asymmetric sampling region in at least one direction in k-space; and generate real space image data including a phase correction based on the acquired magnetic resonance signals, the image data depicting the first component as a lower signal region than a signal region of the second component. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A magnetic resonance imaging (MRI) method comprising:
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controlling gradient magnetic field generators, a radio frequency (RF) transmitter and an RF receiver coupled to at least one RF coil disposed in an imaging volume of an MRI system to effect; acquiring first and second magnetic resonance signals from a same imaging area of an object by applying at least one inversion recovery pulse according to a relaxation time of a fluid flowing within the object, the first magnetic resonance signals from the fluid, having negative values, the second magnetic resonance signals from the fluid, having positive values; and generating first and second image data, respectively based on the first and second magnetic resonance signals, the first image data depicting the fluid as a lower signal region than a signal region of a tissue, the second image data depicting the fluid as a higher signal region than a signal region of the tissue; wherein the first image data are generated with a phase correction based on the second magnetic resonance signals.
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Specification