Ultrasound Enhanced Magnetic Resonance Imaging
First Claim
1. A method for ultrasound enhanced magnetic resonance imaging, the method comprising:
- acquiring ultrasound data representing a region of a patient at a first rate, a first frame of the ultrasound data for the region being acquired at a first time and a second frame of the ultrasound data for the region being acquired at a second time after the first time;
acquiring scan magnetic resonance data representing the region of the patient at a second rate less than the first rate, a first frame of the scan magnetic resonance data for the region being acquired at substantially the first time and a second frame of the scan magnetic resonance data for the region being acquired at a third time after the first and second times;
determining motion from the first time to the second time from the first and second frames of the ultrasound data;
constructing a third frame of constructed magnetic resonance data from the first frame of the scan magnetic resonance data and the motion, the third frame representing the region at the second time; and
displaying an image as a function of the third frame of the constructed magnetic resonance data.
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Accused Products
Abstract
Magnetic resonance imaging frame rate is increased using ultrasound information. Magnetic resonance (MR) images may be provided at an increased frame rate relative to the MR acquisition. For times between acquisition of MR data, MR data may be created. To account for any change in position of tissue over time, ultrasound is used to track the location of tissue or other imaged structure. The ultrasound-based location information is used to indicate the position of intensities or values of the created MR data. MR images at a higher frame rate than the MR acquisition are generated, but with accuracy of relative position based on the ultrasound data.
33 Citations
20 Claims
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1. A method for ultrasound enhanced magnetic resonance imaging, the method comprising:
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acquiring ultrasound data representing a region of a patient at a first rate, a first frame of the ultrasound data for the region being acquired at a first time and a second frame of the ultrasound data for the region being acquired at a second time after the first time; acquiring scan magnetic resonance data representing the region of the patient at a second rate less than the first rate, a first frame of the scan magnetic resonance data for the region being acquired at substantially the first time and a second frame of the scan magnetic resonance data for the region being acquired at a third time after the first and second times; determining motion from the first time to the second time from the first and second frames of the ultrasound data; constructing a third frame of constructed magnetic resonance data from the first frame of the scan magnetic resonance data and the motion, the third frame representing the region at the second time; and displaying an image as a function of the third frame of the constructed magnetic resonance data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. In a non-transitory computer readable storage medium having stored therein data representing instructions executable by a programmed processor for ultrasound enhanced magnetic resonance imaging, the storage medium comprising instructions for:
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generating, by magnetic resonance scanning, a temporal sequence comprising sets of first magnetic resonance data; determining, with ultrasound, a change in location over time for each of a plurality of locations represented in at least a first set of the sets of magnetic resonance data; creating additional sets of magnetic resonance data from one or more of the sets of first magnetic resonance data as a function of the changes in locations; and inserting the additional sets into the temporal sequence such that the temporal sequence of the sets and additional sets has a greater frame rate than the sets generated by magnetic resonance scanning. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A system for ultrasound enhanced magnetic resonance imaging, the system comprising:
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a magnetic resonance (MR) system configured to provide a first sequence of frames of MR data; an ultrasound system configured to provide a second sequence of frames of ultrasound data; and a processor configured to determine spatial offsets over time from the ultrasound data and to increase a frame rate of MR images applying the spatial offsets to the MR data. - View Dependent Claims (19, 20)
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Specification