Ultrasound contrast imaging method and region detection and development methods for contrast images

Abstract

A contrast-enhanced ultrasound imaging method and a method for regional detection and development of a contrasted image. The method for regional detection of a contrasted image comprises: acquiring a tissue signal and a contrast signal in a contrast-enhanced ultrasound imaging process (S201); preprocessing respectively the tissue signal and the contrast signal (S202); comparison processing the preprocessed tissue signal and the contrast signal (S203); by means of a threshold segmentation approach, segmenting an image formed when comparison processed into a contrast agent effect region, a tissue residue effect region, and a noise effect region (S204); and, respectively marking corresponding positions on the contrasted image as a contrast agent region, the tissue residue effect region, and the noise effect region (S205). The regional detection method greatly increases the CTR of a contrast-enhanced ultrasound image, facilitates clinical observation, and enhances the contrast agent signal, thus allowing for a reduced contrast agent dosage injected during contrast-enhanced ultrasound imaging and effectively reduced examination costs.

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 a relatively mature non-invasive detection method at present. Compared with CT and MRI (Magnetic Resonance Imaging, 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 o...

AI Technical Summary

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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