B-ultrasound echo-free area

If you find an echo-free area after the B-ultrasound examination, you should do further examination. This is an abnormal situation. If you do not pay attention, you may suffer from other disease symptoms or more serious sequelae. The most common ones are nephritis or ovarian disease. No matter which disease it is, it is relatively dangerous and the real cause needs to be found as soon as possible.

1 Description of echo strength: The echo signal is divided into strong echo, equal echo, low echo and no echo according to the different gray levels in the image. The standard for echo strength or height is generally based on the normal echo of the organ or determined by comparing the echo of the lesion site with the echo intensity of surrounding normal organs. For example, liquid is anechoic, while stone gas or calcification is highly echoic. The internal echoes of normal human soft tissues are arranged from strong to weak as follows: renal sinus > placenta > pancreas > liver > spleen > renal cortex > subcutaneous fat > renal medulla > brain > venous blood > bile and urine.

2 Description of echo distribution: According to the distribution of light spots in the image, it can be divided into uniform or uneven, dense or sparse. The echo distribution in the lesion can be described as "homogeneous" or "inhomogeneous".

3 Description of echo morphology: Light cluster: Echo light spots gather in bright clusters with certain boundaries. Light spot: Echo light spots gather in the form of small bright flakes with clear boundaries. Light spot: The echo appears in the form of a tiny dot. Aura: Displays circular or quasi-circular echo rings. Light band: Displays echoes in the shape of a strip.

4 Description of certain special signs: that is, the sonographic images of certain lesions are figuratively named as certain signs to emphasize these signs. Commonly used signs include the "target ring" sign, "bull's eye" sign, "hump" sign, "double-barreled gun" sign, etc.

Bones, metal rings, etc.; low-echo areas are mostly hemangiomas, small tumors, early edema of acute inflammation, benign tumors or semi-solid and semi-cystic masses, and local fat accumulation. The anechoic area is mostly filled with fluid, which is often seen in fluid cavities such as the gallbladder, bladder, cysts, and benign ovarian masses. If there is a small dark area without echo in the ovary, it may be a mature follicle, and some small cysts in the ovary (within 3 cm in diameter) may be physiological, so regular check-ups are sufficient. The presence of anechoic areas within a solid tumor indicates liquefactive necrosis within the tumor.