Overview of the role and clinical application of mammography

Mammography (X-ray photography) is the core tool for breast cancer screening and diagnosis. Its role is mainly reflected inEarly lesion detection, calcification point identification, benign and malignant identificationand under follow-up monitoring. The main content is divided into three parts:Screening value (core), diagnostic accuracy (key), technical limitations (supplementary). Through low-dose X-ray imaging, mammography can clearly show breast structural abnormalities and is especially sensitive to microcalcifications. It is the first choice for routine screening of women over 40 years old.

The value of screening: the key to early detection

The core advantage of mammography is thatLesion detection in the asymptomatic stage. Studies show that regular mammography screening can reduce breast cancer mortality by 20%-30% (American Cancer Society data). Its high-resolution imaging can capture masses or clusters of calcifications <1cm (one of the signs of malignancy), such as those typical of ductal carcinoma in situ. International guidelines recommend that women over 40 years old should undergo mammography examination every 1-2 years, and high-risk groups should undergo mammography examination as early as 30 years old.

Diagnostic accuracy: details determine discrimination

Mammography target passedLateral oblique view (MLO) and craniocaudal view (CC)Dual-view imaging provides three-dimensional information on the overlapping structure of breast tissue. Among them, the calcification shape (such as fine sand-like, branch-like) and the edge of the mass (burr-like, smooth) are important basis for judging benign and malignant. For example,BI-RADS grading system(American College of Radiology standards) classify lesions into categories 0-6 based on mammography findings to guide clinical decision-making. However, it should be noted that dense breasts may reduce the sensitivity of mammography, so ultrasound or MRI must be combined.

Technical limitations and supplementary means

Mammography has limited penetration into dense breast tissue (common in younger women) and is prone to false negatives. In addition, about 10%-15% of breast cancers cannot be detected by mammography (such as invasive lobular carcinoma). At this time it is necessary to rely onUltrasound (evaluation of solid masses) or MRI (detection of multifocality in high-risk populations). The new digital breast tomography (DBT) can reduce tissue overlap interference and improve the detection rate, but the radiation dose is slightly higher than traditional mammography targets.

Summary: Scientific selection, precise prevention and control

Mammography is the cornerstone of the breast cancer prevention and control system.Standardized operations and joint diagnosticsCrucial. Screening should be combined with individual risks (eg, family history, BRCA gene mutations), and diagnosis requires a combination of imaging and pathology. Currently, mainstream equipment manufacturers includeGE (Senographe), Siemens (Mammomat), Hologic (Selenia)etc., digital mammography targets have gradually replaced analog technology. In the future, artificial intelligence-assisted film reading may further optimize early detection efficiency.

Quote sources:
1. American Cancer Society (ACS) Breast Cancer Screening Guidelines 2023 Edition
2. American College of Radiology (ACR) BI-RADS 5th Edition Standard
3. World Health Organization (WHO) "Expert Consensus on Early Diagnosis and Treatment of Breast Cancer"