Breast B-ultrasound (breast ultrasound)It is a non-invasive medical method that uses high-frequency acoustic imaging technology to examine breast tissue. It is mainly used to screen for breast lumps, cysts, inflammation and other lesions, and to assist in the diagnosis of breast cancer. Its advantages include no radiation and repeatable operation, which is especially suitable for young women and pregnant women. The content will focus on the principles, applicable groups, examination procedures, clinical significance and precautions to help readers fully understand this examination method.

The working principle and applicable groups of breast B-ultrasound
Breast B-ultrasound emits high-frequency sound waves to the breast through a probe, and generates images based on the echoes reflected by the tissue. It can clearly display breast glands, fat layer and blood vessel structure, and its detection effect on dense breasts (common in young women) is better than mammography. Applicable groups include:①Those with breast pain or palpable lumps;②People at high risk of breast cancer (such as family history);③Routine screening for women under 40 years of age. The Chinese Anti-Cancer Association recommends that women over the age of 20 should undergo a clinical breast examination every year, and B-ultrasound can be used as the first auxiliary method.

Examination process and patient preparation
During the examination, the patient needs to lie on his back with his breast exposed, and the doctor will apply coupling agent to the skin to improve the efficiency of sound wave conduction. The probe scans the breast at different angles. The whole process takes about 10-15 minutes and is painless. Things to note include:①Avoid menstrual periods (hormones affect breast status);②Avoid applying skin care products before the examination;③Wear loose clothing to facilitate inspection. Some hospitals use three-dimensional ultrasound technology to display the location of lesions three-dimensionally and improve diagnostic accuracy.

Clinical significance and limitations
B-ultrasound can differentiate between cystic (fluid-filled) and solid masses, and initially determine benign (such as fibroadenoma) or malignant features (marginal burrs, microcalcifications). But there are limitations:①The sensitivity to microcalcifications is lower than that of mammography;②Rely on doctor experience. Comprehensive evaluation usually requires combination with mammography or MRI. Data shows that the detection rate of breast cancer by B-ultrasound is about 85%, which can be increased to 92% when combined with mammography (data source: "China Breast Cancer Screening Guidelines" 2023 Edition).

Summary and suggestions
Breast B-ultrasound is an important tool for breast health management, especially suitable for young women and dense breast screening. But please note:①Regular inspections are more important than a single result;②Abnormal results require further puncture or biopsy for confirmation. Currently, mainstream equipment manufacturers include GE (model Logiq E10), Philips (EPIQ 7G), domestic Mindray Medical (Resona 7), etc. It is recommended to choose a regular medical institution and develop a personalized screening plan based on the doctor's advice.

Quote sources:
1. "Breast Cancer Screening Guidelines in China" (2023 Edition) - Chinese Anti-Cancer Association
2. "Breast Ultrasound Diagnosis" - People's Medical Publishing House (Editor-in-Chief: Zhang Jinxi)
3. World Health Organization (WHO) Breast Cancer Early Diagnosis Recommendations Document