Methods for motion tracking and correction of ultrasound ensemble

A method for generating motion corrected Doppler ensemble data, the method comprising:

• (a) accessing with a computer system, ultrasound data acquired from a subject with an ultrasound system, wherein the ultrasound data comprise image frames obtained at a plurality of different time points;
• (b) generating reformatted data with the computer system by reformatting the ultrasound data as a Casorati matrix;
• (c) generating motion matrix data with the computer system by computing a similarity metric of each column of the reformatted data with every other column of the reformatted data;
• (d) processing the motion matrix to identify a reference frame with the computer system;
• (e) analyzing the motion matrix data with the identified reference frame and based on this analysis generating updated ultrasound data by directing the computer system to process the ultrasound data to reduce motion corruption when analysis of the motion matrix data indicates motion occurred when the ultrasound data were acquired;
• and
• (f) generating motion corrected Doppler ensemble data based upon the updated ultrasound data using the computer system.

A method to generate a reduced ensemble of high frame-rate data with enhanced motion tracking accuracy and speed, the method comprising:

• (a) accessing with a computer system, ultrasound data acquired from a subject with an ultrasound system, wherein the ultrasound data comprise image frames obtained at a plurality of different time points;
• (b) generating reformatted data with the computer system by reformatting the ultrasound data as a Casorati matrix;
• (c) generating motion matrix data with the computer system by computing a similarity metric of each column of the reformatted data with every other column of the reformatted data;
• (d) processing the motion matrix to identify a reference frame with the computer system;
• (e) analyzing the motion matrix data with the identified reference frame and based on this analysis generating updated ultrasound data by directing the computer system to process the ultrasound data to reduce motion corruption when analysis of the motion matrix data indicates motion occurred when the ultrasound data were acquired;
• and
• (f) generating a reduced ensemble of high frame-rate data with enhanced motion tracking accuracy and speed based upon the updated ultrasound data using the computer system.

A method to generate a reduced ensemble of high frame-rate data with enhanced similarity, the method comprising:

• (a) accessing with a computer system, ultrasound data acquired from a subject with an ultrasound system, wherein the ultrasound data comprise image frames obtained at a plurality of different time points;
• (b) generating reformatted data with the computer system by reformatting the ultrasound data as a Casorati matrix;
• (c) generating motion matrix data with the computer system by computing a similarity metric of each column of the reformatted data with every other column of the reformatted data;
• (d) processing the motion matrix to identify a reference frame with the computer system;
• (e) analyzing the motion matrix data with the identified reference frame and based on this analysis generating updated ultrasound data by directing the computer system to process the ultrasound data to reduce motion corruption when analysis of the motion matrix data indicates motion occurred when the ultrasound data were acquired by removing image frames with a similarity metric below a threshold value;
• and
• (f) generating a reduced ensemble of high frame-rate data with enhanced similarity based upon the updated ultrasound data using the computer system.