System and Method for Hybrid Radiofrequency Labeling for Magnetic Resonance Imaging
First Claim
1. A method for acquiring a magnetic resonance angiography (MRA) image of a portion of a vasculature of a subject using a magnetic resonance imaging system, the method comprising:
- applying a first labeling pulse sequence to a first labeling region having a first portion of a vasculature of a subject extending through the first labeling region to label spins moving within the first labeling region;
applying a second labeling pulse sequence to a second labeling region having a second portion of a vasculature of the subject extending through the second labeling region to label spins moving within the second labeling region, wherein the first and second labeling pulse sequences include different labeling techniques;
applying an imaging pulse sequence to an imaging region having a third portion of a vasculature of the subject extending through the imaging region that is displaced from the first and second labeling region to acquire imaging data from the spins labeled by the first labeling pulse sequence and the second labeling pulse sequence; and
reconstructing an MRA image of at least the third portion of the vasculature of the subject from the medical imaging data.
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Accused Products
Abstract
A system and method is provided for magnetic resonance angiography (MRA) that includes applying a first labeling pulse sequence to a first labeling region having a first portion of a vasculature of a subject extending through the first labeling region to label spins moving within the first labeling region. A second labeling pulse sequence is applied to a second labeling region having a second portion of a vasculature of the subject extending through the second labeling region to label spins moving within the second labeling region. The first and second labeling pulse sequences include different labeling techniques. An imaging pulse sequence is applied to an imaging region having a third portion of a vasculature of the subject extending through the imaging region that is displaced from the first and second labeling region to acquire imaging data from the spins labeled by the first labeling pulse sequence and the second labeling pulse sequence. An MRA image is reconstructed of at least the third portion of the vasculature of the subject from the medical imaging data.
14 Citations
16 Claims
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1. A method for acquiring a magnetic resonance angiography (MRA) image of a portion of a vasculature of a subject using a magnetic resonance imaging system, the method comprising:
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applying a first labeling pulse sequence to a first labeling region having a first portion of a vasculature of a subject extending through the first labeling region to label spins moving within the first labeling region; applying a second labeling pulse sequence to a second labeling region having a second portion of a vasculature of the subject extending through the second labeling region to label spins moving within the second labeling region, wherein the first and second labeling pulse sequences include different labeling techniques; applying an imaging pulse sequence to an imaging region having a third portion of a vasculature of the subject extending through the imaging region that is displaced from the first and second labeling region to acquire imaging data from the spins labeled by the first labeling pulse sequence and the second labeling pulse sequence; and reconstructing an MRA image of at least the third portion of the vasculature of the subject from the medical imaging data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A magnetic resonance imaging (MRI) system comprising:
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a magnet system configured to generate a polarizing magnetic field about at least a portion of a subject arranged in the MRI system; a plurality of gradient coils configured to apply a gradient field to the polarizing magnetic field; a radio frequency (RF) system configured to apply an excitation field to the subject and acquire MR image data therefrom; a computer system programmed to; apply a first labeling pulse sequence to a first labeling region having a first portion of a vasculature of a subject extending through the first labeling region to label spins moving within the first labeling region; apply a second labeling pulse sequence to a second labeling region having a second portion of a vasculature of the subject extending through the second labeling region to label spins moving within the second labeling region, wherein the first and second labeling pulse sequences include different labeling techniques; apply an imaging pulse sequence to an imaging region having a third portion of a vasculature of the subject extending through the imaging region that is displaced from the first and second labeling region to acquire imaging data from the spins labeled by the first labeling pulse sequence and the second labeling pulse sequence; and reconstructing an MRA image of at least the third portion of the vasculature of the subject from the medical imaging data. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification