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US 9,955,943 B2Granted
Windowed time-reversal music technique for super-resolution ultrasound imaging
AssigneeLos Alamos National Security, LLC
InventorsLianjie Huang, Yassin Labyed
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Abstract
Systems and methods for super-resolution ultrasound imaging using a windowed and generalized TR-MUSIC algorithm that divides the imaging region into overlapping sub-regions and applies the TR-MUSIC algorithm to the windowed backscattered ultrasound signals corresponding to each sub-region. The algorithm is also structured to account for the ultrasound attenuation in the medium and the finite-size effects of ultrasound transducer elements.
Claims13
A method of performing ultrasound imaging of a medium, comprising:
- exciting a first transducer element in an array of transducer elements to direct an ultrasound signal into a target region within the medium;
- receiving a backscatter signal from the target region within the medium with the array of transducer elements;
- generating an inter-element transfer matrix of the received backscatter signal;
- generating a generalized time-reversal (TR) matrix from the inter-element transfer matrix;
- and
- generating a pseudo-spectrum for generalized TR-Music imaging of the target region,
- wherein generating the inter-element transfer matrix comprises calculating the inter-element transfer matrix as a function of an electro-mechanical response of each transducer element in the array, a diffraction response of each transducer element in the array, and attenuation in the target region.
4 more elements
An ultrasound imaging system, comprising:
- (a) a processor;
- and
- (b) programming executable on said processor for:
- (i) exciting a first transducer element in an array of transducer elements to direct an ultrasound signal into a target region of tissue;
- (ii) receiving a backscatter signal from the target region with the array of transducer elements;
- and
- (iii) performing time reversal imaging by:
- generating an inter-element transfer matrix of the received backscatter signal;
- generating a generalized time-reversal (TR) matrix from the inter-element transfer matrix;
- and
- generating a pseudo-spectrum for generalized TR-Music imaging of the target region,
- wherein generating the inter-element transfer matrix comprises calculating the inter-element transfer matrix as a function of an electro-mechanical response of each transducer element in the array, a diffraction response of each transducer element in the array, and attenuation in the target region.
9 more elements
Dependencies are inferred from the claim text.