Stafford Leak Warren studied nuclear medicine in the United States during the twentieth century. He used radiation to make images of the body for diagnosis or treatment and developed the mammogram, a breast imaging technique that uses low-energy X-rays to produce an image of breasts. Mammograms allow doctors to diagnose breast cancer in its early and most treatable stages. Warren was also a medical advisor to the Manhattan Project, the US government’s program to develop an atomic bomb during World War II, and he was responsible for the health and safety aspects of the Trinity Test, the first atomic bomb test in the US. Warren’s invention of the mammogram has allowed physicians to diagnose breast cancer in women during its most treatable stages, preventing deaths due to breast cancer.

Mammography or mastography is an imaging technology used in the twentieth century for the detection of breast cancer and other breast abnormalities. Breast cancer is an abnormal growth in breast tissue that can spread to other parts of the body and cause death. Breast cancer affects about twelve percent of women worldwide. In the twenty-first century, mammography is one of the most accurate tools for screening and diagnosing breast cancer. A mammogram is the image created by sending low-level X-rays through breast tissue then filmed or a digital recorder captures the image, which a radiologist analyzes. A Senographe is the instrument used to create the mammogram to screen for breast cancer and other breast diseases. Mammography significantly decreased the number of deaths from breast cancer, but it can also give false positive results and cause physicians to over diagnose that may result in treatment for diseases women do not have.