Pulse inversion harmonic plane wave fast contrast imaging method based on compressive sensing adaptive beamforming

Abstract

The present invention provides a pulse inversion harmonic plane wave rapid contrast imaging method based on compressed sensing adaptive beam synthesis, which makes real-time imaging of plane wave contrast images with high resolution and contrast-to-tissue ratio possible. This method only performs compressed random sampling processing on the second-order harmonic components of the contrast echoes received by the ultrasonic array probe array elements, greatly eliminates redundant data, and reduces the amount of beamforming calculations; further uses compressed sensing theory to analyze adaptive beam The performance of the synthesis algorithm is optimized, and the fast beam synthesis operation is realized under the premise of ensuring that the image resolution is not reduced; combined with the pulse inversion harmonic contrast imaging method, the transducer alternately emits a pair of plane waves with opposite phases to detect microbubbles with high sensitivity The non-linear harmonic component greatly improves the contrast-to-tissue ratio of the image, and at the same time, only two plane wave launches are needed to quickly synthesize a plane wave contrast image, which avoids the damage caused by multiple radiations of microbubbles and accurately captures the transient state of microbubbles. state distribution.

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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