Mammography: the “gold standard” for breast cancer screening

Mammography (full name mammography) is an imaging technology that examines breast tissue through low-dose X-rays. It is mainly used for early screening and diagnosis of breast cancer. Its core advantage is that it can clearly display breast calcifications, masses and other small lesions, which is of great significance for screening women over 40 years old. The content will revolve aroundDefinition and principles, applicable groups, inspection process, advantages, disadvantages and precautionsExpand to help readers fully understand this technology.

1. Definition and working principle of mammography

Mammography uses soft X-rays to penetrate breast tissue and generate images through the differences in the absorption of X-rays by tissues of different densities. During the examination, the breast is compressed between two plates to fix its position and reduce radiation dose, and imaging can reveal breast glands, fat, and potential lesions. This technology iscalcification(one of the early manifestations of breast cancer) has a very high detection rate and is difficult to replace by other examinations such as ultrasound or MRI. The World Health Organization (WHO) lists it as the preferred method for breast cancer screening.

2. Who needs mammography?

According to the guidelines of the Chinese Anti-Cancer Association,Women over 40 years oldIt is recommended to have a mammogram every 1-2 years; high-risk groups such as those with a family history of breast cancer and those carrying BRCA gene mutations can do so as early as 30 years old. However, the breast tissue of young women is dense, and the effect of mammography may be limited, so it needs to be combined with ultrasound examination. Men may also need this test if they have breast abnormalities (such as lumps). It should be noted that pregnant women or women preparing for pregnancy should avoid mammography unless there is a clinical emergency.

3. Inspection process and precautions

Before the examination, you need to take off your upper body clothes. The technician will help place the breast gland on the device and compress it briefly (there may be slight discomfort). The whole process takes about 10-15 minutes. Results are usually issued by a radiologist within 24-48 hours. To improve accuracy, it is recommended to avoid the week before menstruation (breast congestion affects imaging) and avoid using skin care products or antiperspirants on the day of examination. If abnormalities are found, further biopsy or MRI may be needed to confirm.

4. Limitations and alternatives of mammography

Although mammography is the “gold standard” for screening, there are stillfalse negative(such as dense breasts masking lesions) orfalse positive(Additional inspection is required to rule out) risks. Therefore, "mammography + ultrasound" combined screening is often recommended clinically, especially for Asian women who generally have dense breast tissue. In addition, MRI has higher sensitivity for high-risk groups, but it is expensive and takes a long time to examine. Patients should choose a personalized plan based on their doctor's recommendations.

Summary: Look at the value of mammography targets rationally

Mammography is an important means of early screening for breast cancer, but it is not a panacea. Its advantages are that it is efficient, non-invasive and cost-controllable, while its limitations need to be compensated for by multi-modal examination. Women should conduct regular screenings based on their age, family history and doctor’s guidance, and develop the habit of breast self-examination. Advances in technology (such as digital breast tomography (DBT)) are further improving the accuracy of mammography, which may cover a wider range of people in the future.

Note: The content of this article is for reference only. Specific examinations must be carried out according to the doctor's advice. The equipment brands listed are only common examples in the industry and are not intended for commercial promotion.