Enhanced contrast MR system accommodating vessel dynamic fluid flow
First Claim
1. A system for enhancing MR imaging contrast between vessels containing dynamically flowing blood and static tissue, comprising:
- an MR imaging system for, in response to a heart rate synchronization signal,(a) acquiring an anatomical preparation data set representing a spatially non-localized first preparation 3D volume in response to a first magnetization preparation pulse sequence,(b) acquiring a spatially localized anatomical imaging data set representing an imaging 3D volume encompassed by said preparation 3D volume in response to a second magnetization preparation pulse sequence,(c) subtracting slice specific MR imaging data of said spatially localized anatomical imaging data set from spatially and temporally corresponding slice specific imaging data of said anatomical preparation data set to derive blood flow indicative imaging data, said temporally corresponding slice specific imaging data comprising data acquired at a substantially corresponding cyclic point within a heart beat cycle determined in response to said heart rate synchronization signal and(d) iteratively repeating step c for a plurality of adjacent slices individually comprising a spatially localized anatomical imaging data set to provide a three-dimensional imaging data set of blood flow indicative imaging data; and
a display processor for generating data representing at least one three dimensional display image presenting blood flow into a three dimensional imaging volume using the three-dimensional imaging data set.
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Accused Products
Abstract
A system enhances MR imaging contrast between vessels containing dynamically flowing blood and static tissue using an MR imaging system. The MR imaging system, in response to a heart rate synchronization signal, acquires an anatomical preparation data set representing a spatially non-localized preparation 3D volume in response to a first magnetization preparation pulse sequence. The MR imaging system acquires a spatially localized anatomical imaging data set representing a second imaging volume. The MR imaging system subtracts slice specific MR imaging data of the spatially localized anatomical imaging data set from spatially and temporally corresponding slice specific imaging data of the anatomical preparation data set to derive blood flow indicative imaging data. The temporally corresponding slice specific imaging data comprises data acquired at a substantially corresponding cycle point within a heart beat cycle determined in response to said heart rate synchronization signal. The MR imaging system iteratively repeats the subtraction step for multiple adjacent slices individually comprising a spatially localized anatomical imaging data set to provide a three-dimensional imaging data set.
15 Citations
23 Claims
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1. A system for enhancing MR imaging contrast between vessels containing dynamically flowing blood and static tissue, comprising:
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an MR imaging system for, in response to a heart rate synchronization signal, (a) acquiring an anatomical preparation data set representing a spatially non-localized first preparation 3D volume in response to a first magnetization preparation pulse sequence, (b) acquiring a spatially localized anatomical imaging data set representing an imaging 3D volume encompassed by said preparation 3D volume in response to a second magnetization preparation pulse sequence, (c) subtracting slice specific MR imaging data of said spatially localized anatomical imaging data set from spatially and temporally corresponding slice specific imaging data of said anatomical preparation data set to derive blood flow indicative imaging data, said temporally corresponding slice specific imaging data comprising data acquired at a substantially corresponding cyclic point within a heart beat cycle determined in response to said heart rate synchronization signal and (d) iteratively repeating step c for a plurality of adjacent slices individually comprising a spatially localized anatomical imaging data set to provide a three-dimensional imaging data set of blood flow indicative imaging data; and a display processor for generating data representing at least one three dimensional display image presenting blood flow into a three dimensional imaging volume using the three-dimensional imaging data set. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system for enhancing MR imaging contrast between vessels containing dynamically flowing blood and static tissue, comprising:
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an MR imaging system for, in response to a heart rate synchronization signal, (a) acquiring an anatomical preparation data set representing a non-slice specific first preparation 3D volume in response to a non-slice specific first magnetization preparation pulse sequence, (b) acquiring a spatially localized 3D anatomical imaging data set representing a slice specific second imaging volume encompassed by said preparation 3D volume in response to a second magnetization preparation pulse sequence and (c) subtracting slice specific MR imaging data of said anatomical imaging data set from spatially and temporally corresponding slice specific imaging data of said anatomical preparation data set to derive imaging data representing blood flow into said slice specific second imaging volume from said non-slice specific preparation 3D volume, said temporally corresponding slice specific imaging data comprising data acquired at a substantially similar cyclic point within a heart beat cycle determined in response to said heart rate synchronization signal; and a display processor for generating data representing at least one display image presenting blood flow indicative image data derived by the subtraction. - View Dependent Claims (17, 18, 19, 20, 21)
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22. A method for enhancing MR imaging contrast between vessels containing dynamically flowing blood and static tissue, comprising the activities of:
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in response to a heart rate synchronization signal, (a) acquiring an anatomical preparation data set representing a non-slice specific preparation 3D volume in response to a non-slice specific first magnetization preparation pulse sequence, (b) acquiring a spatially localized anatomical imaging data set representing a slice specific second imaging 3D volume encompassed by said preparation 3D volume in response to a second magnetization preparation pulse sequence, (c) subtracting slice specific MR imaging data of said anatomical imaging data set from spatially and temporally corresponding slice specific imaging data of said anatomical preparation data set to derive imaging data representing blood flow into said slice specific second imaging volume from said non-slice specific preparation 3D volume, said temporally corresponding slice specific imaging data comprises data acquired at a substantially corresponding cyclic point within a heart beat cycle determined in response to said heart rate synchronization signal and (d) iteratively repeating steps c for a plurality of adjacent slices individually comprising an anatomical imaging data set to provide a three-dimensional imaging data set of blood flow indicative imaging data; and generating data representing at least one three dimensional display image presenting blood flow into a three dimensional imaging volume using the three-dimensional imaging data set. - View Dependent Claims (23)
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Specification