B-ultrasound shows low echo area

After completing the B-ultrasound, it was found that the examination results showed a low echo area. This may be a situation that occurs after a certain organ in the body is diseased. Some may be due to inflammatory changes. In the early stages, the patient will feel edema in his body. At this time, the examination results will show a decrease in echo, so treatment measures must be taken in time to prevent the edema from becoming more serious.

1Ultrasound has significant image differences between fluid and solid tissue, making them easy to identify.

2 Homogeneous and heterogeneous lesions

Homogeneous lesions present uniformly low echoes, isoechoes or strong echoes, while inhomogeneous lesions present complex echo structures.

3 Calcified and air-containing lesions

The image of calcified lesions is stable and the acoustic shadow is clear, while the image of air-containing lesions is unstable and the acoustic shadow is blurry.

4 Inflammatory and fibrotic lesions

In the early stage of acute inflammation, edema is the main symptom, local echo decreases, organ swelling, and increased meridian values; in chronic inflammation, fibrous tissue increases, and echoes become thicker and more numerous.

Fibrotic lesions are often highly echogenic and their appearance varies depending on the severity of the lesion. For example, schistosomiasis liver fibrosis presents typical "map"-like changes.

5 Benign and malignant lesions

Generally speaking, benign lesions have uniform texture and a single interface, so the echo is uniform and regular. Malignant lesions grow rapidly, are accompanied by bleeding and degeneration, and the intratumoral tissue interface is complex and uneven, manifesting as an irregular echo structure.

For example, (1) tumor margin: ① present: benign or malignant, not extending outward; ② false margin: halo, buffalo eye; ③ regular: can be benign or malignant; ④ clear demarcation: mostly benign; ⑤ irregular, pseudopodia extending: mostly malignant.

(2) Internal echo: ① Uniform: more likely to be benign; ② Uneven: more likely to be malignant. However, mild pancreatitis is low echo, while severe pancreatitis is thick and strong echo.

(3) Other internal structures: ① Normal: mostly benign; ② Abnormal: mostly malignant.

(4) Posterior echo: ① Normal or enhanced: mostly benign; ② Normal or weakened: mostly malignant.

(5) Invasion or metastasis: Tumors that block or invade ducts, adjacent tissues, and/or organs and spread or metastasize are considered malignant.