How to do ultrasound contrast imaging

As the environment changes, the air quality is getting worse and worse, which leads to a decrease in people's resistance and they often suffer from various diseases. In medicine, doctors often use some technical means to determine whether people are sick or the severity of their illness. Ultrasound angiography is used for many diseases, such as liver angiography, heart angiography, etc. Ultrasound imaging is also used during examinations of pregnant women.

Ultrasound contrast imaging of liver cancer, also known as acoustic contrast imaging, is a technology that uses contrast agents to enhance backscattered echoes, significantly improving the resolution, sensitivity and specificity of ultrasound diagnosis. Ultrasound contrast imaging technology is often used in the diagnosis and differential diagnosis of liver tumors. The diagnostic process is as follows: after the space-occupying lesions of the liver are found on an ordinary ultrasound machine, ultrasound contrast agent is injected through a peripheral vein to observe the internal enhancement of the liver space-occupying lesion within a few minutes. Since the blood supply characteristics of malignant liver tumors are different from those of benign lesions, the difference in ultrasound enhancement can be used to diagnose and differentially diagnose malignant liver tumors. Currently, ultrasound contrast imaging has been widely used in the detection and qualitative diagnosis of solid organ tumors.

It is superior to conventional ultrasound and spiral CT in many aspects. Especially in detecting sub-centimeter lesions less than 1 cm, the diagnostic ability of acoustic contrast imaging is better than or at least has the same sensitivity as spiral CT. Compared with spiral CT and MRI (magnetic resonance imaging), acoustic angiography has more advantages, such as good safety, no allergic reaction, real-time, and relatively low examination cost. Ultrasound angiography can dynamically observe the dynamic changes of blood flow in the arterial phase, portal venous phase, and delayed phase of liver lesions, and diagnose and differentiate liver lesions based on the characteristic manifestations of various lesions. For example, hepatocellular carcinoma often presents a fast-in-and-out performance, with complete enhancement in the early arterial phase and low echoes in the portal venous phase and delayed phase, which can be distinguished from benign space-occupying lesions in most cases.

Gynecological ultrasound examinations include transabdominal ultrasound, transvaginal ultrasound, color Doppler blood flow imaging, three-dimensional ultrasound imaging and ultrasound angiography. Transabdominal and transvaginal ultrasound examinations can clearly display images of pelvic organs and lesions; color Doppler blood flow imaging can display blood flow information in the examined area and distinguish benign from malignant ovarian tumors through impedance index or pulse index.