Velocity measurement of MR-imaged fluid flows
First Claim
1. A computer-implemented method for measuring velocity of MR-imaged fluid flows, said method comprising use of at least one programmed computer to:
- generate data representing at least two measures of distance traveled by flowing fluid appearing in at least three MR images of a subject'"'"'s tissue taken at different respective imaging times, by calculating incremental distances between adjacent ones of said MR images;
generate data representing each specific velocity of said flowing fluid in each interval by calculating at least two incremental distances traveled by said fluid divided by elapsed time during said travel respectively based on said different respective imaging times of said at least three MR images; and
output said data representing each specific velocity to at least one of;
(a) a display screen, (b) a non-transitory data storage medium, and (c) a remotely located site,whereinsaid MR-images are acquired by fresh blood imaging (FBI) using cardiac gating and successive image slices are each acquired within a single cardiac cycle;
a graph of acquired MR signal intensity as a function of time during a cardiac cycle is displayed to the user; and
a user control input is accepted for use in automatically generating said data representing at least one fluid velocity measurement.
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Abstract
Velocity of MR-imaged fluid flows is measured. Data representing a measure of distance traveled by flowing fluid appearing in at least two MR images of a subject'"'"'s tissue taken at different respective imaging times is generated. Data representing at least one fluid velocity measurement of the flowing fluid is generated by calculating at least one instance of distance traveled by the fluid divided by elapsed time during travel based on different respective imaging times. Data representing at least one fluid velocity measurement is then output to at least one of: (a) a display screen, (b) a non-transitory data storage medium, and (c) a remotely located site.
15 Citations
18 Claims
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1. A computer-implemented method for measuring velocity of MR-imaged fluid flows, said method comprising use of at least one programmed computer to:
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generate data representing at least two measures of distance traveled by flowing fluid appearing in at least three MR images of a subject'"'"'s tissue taken at different respective imaging times, by calculating incremental distances between adjacent ones of said MR images; generate data representing each specific velocity of said flowing fluid in each interval by calculating at least two incremental distances traveled by said fluid divided by elapsed time during said travel respectively based on said different respective imaging times of said at least three MR images; and output said data representing each specific velocity to at least one of;
(a) a display screen, (b) a non-transitory data storage medium, and (c) a remotely located site,wherein said MR-images are acquired by fresh blood imaging (FBI) using cardiac gating and successive image slices are each acquired within a single cardiac cycle; a graph of acquired MR signal intensity as a function of time during a cardiac cycle is displayed to the user; and a user control input is accepted for use in automatically generating said data representing at least one fluid velocity measurement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Apparatus for measuring velocity of MR-imaged fluid flows, said apparatus comprising:
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means for displaying a graph of acquired MR signal intensity of a plurality of acquired MR images as a function of time during a cardiac cycle; means for accepting user control input for use in generating data representing fluid velocity measurements; and at least one programmed computer including; means for generating data representing at least two measures of distance traveled by flowing fluid appearing in at least three MR images of a subject'"'"'s tissue taken at different respective imaging times, by calculating incremental distances between adjacent ones of said MR images; means for automatically generating data representing each specific velocity of said flowing fluid in each interval by dividing said at least two incremental distances traveled by elapsed time during said travel respectively based on said different respective imaging times of said at least three MR images; and means for outputting said data representing each specific velocity to at least one of;
(a) said means for displaying, (b) a non-transitory data storage medium, and (c) a remotely located sitewherein said MR-images are acquired by fresh blood imaging (FBI) using cardiac gating and successive image slices are each acquired within a single cardiac cycle. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification