Magnetic resonance imaging apparatus and magnetic resonance imaging method
First Claim
Patent Images
1. A magnetic resonance (MR) imaging apparatus, comprising:
- an application region calculating unit configured to automatically calculate a prepulse application region based on previously acquired MR pilot image data including a region of interest of an object, said automatically calculated prepulse application region having position, thickness and prepulse direction parameters which vary as a function of the region of interest; and
an MR imaging unit configured to perform diagnostic magnetic resonance imaging (MRI) of the region of interest of the object including application of the automatically calculated prepulse in a diagnostic MRI data acquisition sequence.
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Abstract
According to one embodiment, an MRI apparatus includes an imaging unit and an application region calculating unit. The application region calculating unit automatically calculates an application region of a prepulse according to a region of interest of magnetic resonance imaging based on image data including the region of interest that are acquired before the application of the prepulse. The imaging unit performs magnetic resonance imaging of an object involving the application of the prepulse.
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Citations
16 Claims
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1. A magnetic resonance (MR) imaging apparatus, comprising:
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an application region calculating unit configured to automatically calculate a prepulse application region based on previously acquired MR pilot image data including a region of interest of an object, said automatically calculated prepulse application region having position, thickness and prepulse direction parameters which vary as a function of the region of interest; and an MR imaging unit configured to perform diagnostic magnetic resonance imaging (MRI) of the region of interest of the object including application of the automatically calculated prepulse in a diagnostic MRI data acquisition sequence. - View Dependent Claims (2, 3, 4)
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5. A magnetic resonance (MR) imaging apparatus comprising:
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an imaging unit configured to perform MR imaging of an object including application of a prepulse; and an application region calculating unit configured to automatically calculate an application region of the prepulse according to a region of interest of the MR imaging based on image data including the region of interest that are acquired before the application of the prepulse; wherein the application region calculating unit is configured to determine the automatically calculated application region of the prepulse as an application region of the prepulse; and wherein the application region calculating unit is configured to extract a first tissue region and a second tissue region based on previously acquired MR image data including the region of interest and to automatically calculate the prepulse application region according to the first and second tissue regions and the region of interest. - View Dependent Claims (6)
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7. A magnetic resonance (MR) imaging apparatus comprising:
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an imaging unit configured to perform MR imaging of an object including application of a prepulse; and an application region calculating unit configured to automatically calculate an application region of the prepulse according to a region of interest of the MR imaging based on image data including the region of interest that are acquired before the application of the prepulse; wherein the application region calculating unit is configured to determine the automatically calculated application region of the prepulse as an application region of the prepulse; and wherein, in a case where a presaturation pulse for saturating nuclear spins is applied as the prepulse, the application region calculating unit is configured to;
(a) extract a spine region based on the image data including the spine region as the region of interest, (b) calculate a first straight line that is a linear approximation of the spine region, (c) calculate a second straight line that is translated from the first straight line by a predetermined distance toward a ventral side as far as the second straight line does not reach a body surface on the ventral side, and (d) calculate at least a part of a region on the ventral side of the second straight line as the prepulse application region. - View Dependent Claims (8)
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9. A magnetic resonance (MR) imaging apparatus comprising:
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an imaging unit configured to perform MR imaging of an object including application of a prepulse; and an application region calculating unit configured to automatically calculate an application region of the prepulse according to a region of interest of the MR imaging based on image data including the region of interest that are acquired before the application of the prepulse; wherein the application region calculating unit is configured to determine the automatically calculated application region of the prepulse as an application region of the prepulse; and wherein the application region calculating unit is configured to calculate the prepulse application region according to the region of interest based on a plurality of image data including the region of interest that are acquired at different respiratory phases by magnetic resonance imaging before application of the prepulse. - View Dependent Claims (10, 11)
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12. A magnetic resonance (MR) imaging apparatus comprising:
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an imaging unit configured to perform MR imaging of an object including application of a prepulse; and an application region calculating unit configured to automatically calculate an application region of the prepulse according to a region of interest of the MR imaging based on image data including the region of interest that are acquired before the application of the prepulse; wherein the application region calculating unit is configured to determine the automatically calculated application region of the prepulse as an application region of the prepulse; and wherein the application region calculating unit is configured to calculate the prepulse application region according to the region of interest based on the image data including the region of interest acquired at a desired respiratory phase in respiratory synchronization by magnetic resonance imaging before application of the prepulse. - View Dependent Claims (13, 14)
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15. A magnetic resonance (MR) imaging apparatus comprising:
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an imaging unit configured to perform MR imaging of an object including application of a prepulse; and an application region calculating unit configured to automatically calculate an application region of the prepulse according to a region of interest of the MR imaging based on image data including the region of interest that are acquired before the application of the prepulse; wherein the application region calculating unit is configured to determine the automatically calculated application region of the prepulse as an application region of the prepulse; and wherein the imaging unit is configured to apply as the prepulse an inversion recovery pulse and a spatially-selective presaturation pulse for saturating nuclear spins, and the application region calculating unit is configured to;
(a) calculate a region adjacent to the region of interest as a presaturation pulse application region, and (b) calculate a region including the presaturation pulse application region and the region of interest as an inversion recovery pulse application region.
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16. A magnetic resonance (MR) imaging method comprising:
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automatically machine-calculating an MRI prepulse application region according to a region of interest of an object based on prior MR pilot image data including the region of interest that have been generated by magnetic resonance imaging, said automatically calculated prepulse application region having position, thickness and prepulse direction parameters which vary as a function of the region of interest; and generating diagnostic MR image data by performing diagnostic magnetic resonance imaging of the object including application of the automatically calculated MRI prepulse.
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Specification