TIME REVERSAL AND PHASE COHERENT MUSIC TECHNIQUES FOR SUPER-RESOLUTION ULTRASOUND IMAGING

摘要

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. A modified TR-MUSIC imaging algorithm is used to account for ultrasound scattering from both density and compressibility contrasts. The phase response of ultrasound transducer elements is accounted for in a PC-MUSIC system.

主权项

1. A method of performing ultrasound imaging of a medium, the method comprising:
exciting a first transducer element in an array of transducer elements to direct an ultrasound signal into a target region of 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; said inter-element transfer matrix comprising density contrast data relating to one or more scatterers within said medium; 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; said pseudo-spectrum comprising density contrast data relating to one or more scatterers within said medium.