Method for adipose tissue quantification with magnetic resonance imaging
First Claim
1. A method for calculating a quantitative metric of adipose tissue using a magnetic resonance imaging (MRI) system, the steps of the method comprising:
- a) acquiring k-space data with the MRI system by sampling echo signals that are formed at a plurality of different echo times;
b) producing a fat-concentration map using the k-space data acquired in step a);
c) estimating a maximum fat-concentration value from the fat-concentration map produced in step b);
d) producing an adipose mask using the maximum fat-concentration value estimated in step c) and the fat-concentration map produced in step b); and
e) calculating a quantitative metric of adipose tissue using the adipose mask produced in step d).
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Abstract
A system and method for calculating a quantitative metric of adipose tissue using a magnetic resonance imaging (MRI) system are provided. The MRI system is used to acquire k-space data by sampling echo signals that are formed at a plurality of different echo times. From the acquired k-space data, a fat-concentration map, such as a fat-fraction map is produced. A maximum fat-concentration value is estimated from the fat-concentration map, and is used to threshold the fat-concentration map to produce an adipose mask. From the adipose mask, a quantitative metric of adipose tissue can be calculated.
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Citations
23 Claims
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1. A method for calculating a quantitative metric of adipose tissue using a magnetic resonance imaging (MRI) system, the steps of the method comprising:
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a) acquiring k-space data with the MRI system by sampling echo signals that are formed at a plurality of different echo times; b) producing a fat-concentration map using the k-space data acquired in step a); c) estimating a maximum fat-concentration value from the fat-concentration map produced in step b); d) producing an adipose mask using the maximum fat-concentration value estimated in step c) and the fat-concentration map produced in step b); and e) calculating a quantitative metric of adipose tissue using the adipose mask produced in step d). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A non-transitory computer readable storage medium having stored thereon a computer program comprising instructions that when executed by a processor causes the processor to:
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i) estimate from a stored fat-concentration map, a maximum fat-concentration value that indicates that pixel locations in the fat-concentration map do not contain one-hundred percent fat spins; ii) produce an adipose mask using the estimated maximum fat-concentration value and the stored fat-concentration map; and iii) calculate a quantitative metric of adipose tissue using the adipose mask. - View Dependent Claims (20, 21, 22, 23)
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Specification