Method for contrast-enhanced ultrasound imaging and region detection and imaging method for contrast-enhanced images

Abstract

The present invention provides a method for contrast-enhanced ultrasound imaging and a region detection and imaging method for contrast-enhanced images. The region detection method for contrast-enhanced images includes: acquiring tissue signals and contrast signals in the process of contrast-enhanced ultrasound imaging; Perform preprocessing respectively; compare the preprocessed tissue signal and contrast signal; segment the image formed after comparison processing into contrast agent action area, tissue residual action area and noise action area by means of threshold segmentation; contrast contrast image The corresponding positions on , are marked as contrast agent area, tissue residual area and noise area, respectively. On the one hand, the invention greatly improves the CTR of contrast-enhanced ultrasound images, which is beneficial to clinical observation; on the other hand, it enhances the signal of the contrast agent, so that the contrast dose injected during contrast-enhanced ultrasound can be greatly reduced, and the inspection cost is effectively reduced.

Description

technical field [0001] The invention relates to ultrasound contrast imaging technology, in particular to an ultrasound contrast imaging method and a region detection and imaging method of contrast images. Background technique [0002] Ultrasound imaging is currently a relatively mature non-invasive detection method. Compared with CT and MRI (Magnetic Resonance Imaging, Magnetic Resonance Imaging, Magnetic Resonance Imaging), ultrasonic diagnosis has the advantages of less radiation, low cost, and convenient operation, making ultrasonic diagnosis the primary clinical examination method. [0003] Contrast-enhanced ultrasound is the use of contrast agents to enhance scattered echoes, which can effectively improve the resolution, sensitivity and specificity of ultrasound diagnosis. The core of contrast-enhanced ultrasound imaging technology is how to extract the echo component of the contrast agent in the echo signal and suppress the echo component of the tissue. At present, th...

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Problems solved by technology

[0007] Third, because the signal is too large, each system has its own cancellation performance. After small signal cancellation, the signal is small, and after strong signal cancellation, the tissue residue is also strong. Strong tissue residue makes it impossible to distinguish the angiographic signal from the tissue residue

[0008] Fourth, due to saturation, amplitude modulation is used in the nonlinear detection method, and several pulses with different amplitudes are transmitted. When receiving, the low-amplitude echo signal is readjusted according to the amplitude ratio between the high and low pulses, and compared with the high-amplitude echo signal. Subtraction, which can eliminate the fundamental signal of the tissue; saturation makes the high and low amplitude signals not satisfy the proportional relationship, resulting in the linear component of the tissue that cannot be canceled and remains in the contrast image

[0009] Fifth, due to movement, the phase and amplitude of several transmitted waveforms do not meet the linear cancellation conditions, so that the linear tissue components are eliminated and left in the contrast image

Therefore, in the current contrast-enhanced ultrasound imaging, the existence of tissue residues cannot be avoided

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