Ultrasound processing device

An ultrasound processing device comprising:

• an ultrasound signal processing circuit including:
• a push pulse controller that causes the acoustic element array to transmit focused ultrasound, in order to generate radiation force in a subject;
• a generator that obtains a first wavefront frame data sequence and a second wavefront frame data sequence by detecting, at a plurality of time points, propagation of a shear wave caused by radiation force generated by the focused ultrasound, and converting detected content into data according to data conversion conditions that are different for the first wavefront frame data sequence and the second wavefront frame data sequence;
• an interleaver that obtains a combined wavefront frame sequence by interleaving the first wavefront frame data sequence and the second wavefront frame data sequence;
• and
• a calculator that calculates shear wave speed and elastic modulus in the subject, by performing calculations using change amounts of propagation positions of a shear wave indicated by the combined wavefront frame sequence, wherein
• the data conversion conditions are settings of acoustic line positions for each of a plurality of acoustic elements of the acoustic element array, for forming acoustic line waveforms corresponding to data components by phase shifting signal waveforms inputted from the plurality of acoustic elements and combining phase-shifted signal waveforms,
• the first wavefront frame sequence is composed of wavefront frame data generated by setting acoustic line positions to specific positions of acoustic elements and forming acoustic line waveforms,
• the second wavefront frame sequence is composed of wavefront frame data generated by setting acoustic line positions to positions different from the specific positions of the acoustic elements and forming acoustic line waveforms,
• the interleaving comprises element array direction interleaving, in which a data component included in wavefront frame data of the second frame sequence is inserted between two data components that are consecutive in an element array direction among data components included in wavefront frame data of the first wavefront frame sequence.