System for Concurrent Acquisition of MR Anatomical Brain Images and MR Angiograms Without Contrast-Injection
First Claim
1. A system for concurrent acquisition of an MR anatomical image of an anatomical region of interest and an MR angiogram image of a vessel structure in the region of interest without the use of a contrast agent, comprising:
- an MR imaging system for,in a first repetition time interval,generating a non-selective magnetization preparation pulse for magnetizing an anatomical volume encompassing blood flowing into a selected slab within the volume for blood signal suppression,generating RF excitation pulses andacquiring a first MR imaging dataset of said selected slab within the volume with a suppressed blood signal andin a second repetition time interval succeeding said first repetition time interval,generating a selected slab magnetization preparation pulse for magnetizing said selected slab,generating RF excitation pulses andacquiring a second MR imaging dataset of said selected slab within the volume; and
an image data processor for substantially subtracting imaging data of said first MR imaging data set from said second MR imaging dataset to provide an image enhancing a vessel structure in said selected slab.
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Accused Products
Abstract
An MR imaging system without the use of a contrast agent, in a first repetition time interval, generates a non-selective magnetization preparation pulse for magnetizing an anatomical volume encompassing blood flowing into a selected slab within the volume for blood signal suppression, generates RF excitation pulses and acquires a first MR imaging dataset of the selected slab within the volume with a suppressed blood signal. The system in a second repetition time interval succeeding the first repetition time interval, generates a selected slab magnetization preparation pulse for magnetizing the selected slab, generates RF excitation pulses and acquires a second MR imaging dataset of the selected slab within the volume. An image data processor substantially subtracts imaging data of the first MR imaging dataset from the second MR imaging dataset to provide an image enhancing a vessel structure in the selected slab and also substantially averages imaging data to provide an MR anatomical image.
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Citations
20 Claims
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1. A system for concurrent acquisition of an MR anatomical image of an anatomical region of interest and an MR angiogram image of a vessel structure in the region of interest without the use of a contrast agent, comprising:
an MR imaging system for, in a first repetition time interval, generating a non-selective magnetization preparation pulse for magnetizing an anatomical volume encompassing blood flowing into a selected slab within the volume for blood signal suppression, generating RF excitation pulses and acquiring a first MR imaging dataset of said selected slab within the volume with a suppressed blood signal and in a second repetition time interval succeeding said first repetition time interval, generating a selected slab magnetization preparation pulse for magnetizing said selected slab, generating RF excitation pulses and acquiring a second MR imaging dataset of said selected slab within the volume; and an image data processor for substantially subtracting imaging data of said first MR imaging data set from said second MR imaging dataset to provide an image enhancing a vessel structure in said selected slab. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A system for concurrent acquisition of an MR anatomical image of an anatomical region of interest and an MR angiogram image of a vessel structure in the region of interest without the use of a contrast agent, comprising:
an MR imaging system for, in a first repetition time interval, acquiring a first MR imaging dataset of a selected slab within an anatomical volume with a suppressed blood signal by, generating a non-selective magnetization preparation pulse for magnetizing an anatomical volume encompassing blood flowing into said selected slab within the volume for blood signal suppression and generating RF excitation pulses and in a second repetition time interval different to said first repetition time interval, acquiring a second MR imaging dataset of said selected slab within the volume by generating a selected slab magnetization preparation pulse for magnetizing said selected slab and generating RF excitation pulses; and an image data processor for providing both an anatomical image showing different types of tissue and an angiogram by substantially combining and subtracting the first and second MR imaging datasets, respectively. - View Dependent Claims (16, 17, 18)
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19. A method for concurrent acquisition of an MR anatomical image of an anatomical region of interest and an MR angiogram image of a vessel structure in the region of interest without the use of a contrast agent, comprising the activities of:
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in a first repetition time interval, acquiring a first MR imaging dataset of a selected slab within an anatomical volume with a suppressed blood signal by, generating a non-selective magnetization preparation pulse for magnetizing an anatomical volume encompassing blood flowing into said selected slab within the volume for blood signal suppression and generating RF excitation pulses and in a second repetition time interval different to said first repetition time interval, acquiring a second MR imaging dataset of said selected slab within the volume by generating a selected slab magnetization preparation pulse for magnetizing said selected slab and generating RF excitation pulses; and providing an angiogram by substantially subtracting the first and second MR imaging datasets. - View Dependent Claims (20)
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Specification