The online Sonogram Schools in United States have a Mammography course. It involves studying the application of low energy X rays to examine the human breast for any irregularities. It is a primary tool used for screening and diagnosis of breast cancer in women. Microcalcifications are thoroughly studied in this course. It should be noted here that breast cancer is one of the most common types of cancer in the world and hence the importance of the study of Mammography is immense, as an early detection can help save lives.