A Phase Distortion Compensation Method of Plane Wave Transcranial Sound Field

Abstract

The invention discloses a phase distortion compensation method of a plane wave transcranial sound field. The method includes: determining the acoustic wave time domain signal received by each array element of the transducer outside the skull model and passing through the skull model; calculating the phase difference of each array element from the acoustic wave time domain signal of each array element; according to the phase difference and The phase change curves of different polyhedral bubbles determine the topological structure of the acoustic metamaterial corresponding to each array element; the compensation structure is determined according to the topological structure of the acoustic metamaterial corresponding to each array element; the compensation structure is used to realize plane waves when fixed on the skull Compensation of Transcranial Sound Field Phase Distortion. The invention can compensate the phase distortion generated when the plane wave passes through the skull, and improve the quality of ultrasonic images.

Description

technical field [0001] The invention relates to the field of ultrasonic imaging, in particular to a phase distortion compensation method for a plane wave transcranial sound field. Background technique [0002] In the plane wave transcranial ultrasound imaging, when the skull exists, due to the uneven distribution of the thickness of the skull itself and the sound velocity, the propagation time of the sound waves incident from different angles and passing through the skull is different, so the ultrasonic phase will be distorted. After the incident plane wave passes through the skull, the wavefront is no longer a plane, and the waveform phases at different lateral positions at the same depth are different. If phase correction is not performed, the imaging results will deviate from the actual scattering point position, and problems such as artifacts and resolution degradation will occur, resulting in poor ultrasound image quality. SUMMARY OF THE INVENTION [0003] Based on t...

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Problems solved by technology

If no phase correction is made, the imaging result will deviate from the actual scattering point position, and there will be problems such as artifacts and resolution degradation, and the quality of the ultrasound image will be poor.

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