Which imaging modality is most commonly used for initial breast cancer screening?

Mammography is the most commonly used imaging modality for the initial screening of breast cancer due to its ability to detect tumors at an early stage, often before they can be felt as a lump through a physical exam. This imaging technique utilizes low-energy X-rays to create detailed images of the breast tissue, enabling radiologists to identify any abnormalities such as microcalcifications or masses that could indicate the presence of cancer.

Mammography has been extensively studied and is supported by numerous guidelines from health organizations as an effective method for reducing breast cancer mortality through regular screening, especially in women aged 40 and older. The ability to perform screening on a large scale and the non-invasive nature of the procedure contribute to its widespread adoption in clinical practice.