Pulse inverse harmonic plane wave quick contrast imaging method based on compressed sensing of adaptive beamforming

Abstract

The method comprises only compressing and randomly sampling second harmonic components of contrast echoes received by probe array elements of ultrasonic arrays, and rejecting redundancy data by a large margin to reduce beamforming operands; further optimizing an adaptive beamforming algorithm by the compressed sensing theory, and speeding up the beamforming algorithm on the premise of no reduction of image resolution; and alternately emitting a pair of plane waves being opposite in phases by an transducer combining with a pulse inverse harmonic contrast imaging mode. A plane wave contrast image can be quickly synthesized only by twice plane wave emission while non-linear harmonic components of micro bubbles can be detected at high sensitivity and the contrast-to-tissue ratio can be greatly raised, destroys to the micro bubbles caused by multi-time radiation can be prevented, and the transient distribution of the micro bubbles can be accurately captured.

Description

technical field [0001] The invention belongs to the technical field of contrast-enhanced ultrasound imaging, and in particular relates to a rapid contrast-enhanced imaging method of a pulse inversion harmonic (PIH-CSBF) plane wave based on compressed sensing adaptive beamforming. Background technique [0002] Contrast-enhanced ultrasound imaging is an imaging method that uses the strong nonlinear response of encapsulated microbubbles under the excitation of the sound field to enhance the ability of ultrasound to detect blood flow and effectively identify the distribution of microvessels from the surrounding tissue, and can obtain high-resolution microangiography image. It depicts the dynamic distribution process of contrast perfusion in real time, and at the same time can extract hemodynamic parameters related to physiology and pathology, making early diagnosis of cardiovascular disease and malignant tumor neovascularization and blood perfusion phase analysis possible, and i...

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Problems solved by technology

[0004] Although adaptive beamforming can obtain high-resolution contrast images compared with DAS, its more complex algorithm introduces more calculations

In practical applications, the combination of multi-angle emission coherent compounding and pulse inversion microbubble wavelet transform imaging method combined with adaptive beamforming technology to obtain high CTR and high-resolution imaging images is extremely complicated. , plane wave rapid launch and acquisition of a huge amount of data, making ultra-fast plane wave contrast imaging difficult to achieve real-time

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