Sonomammography is a thorough checkup of the breasts in order to assess their health and evaluate the amount of blood flow inside them. It allows a visualization of the breast tissue in order to examine them thoroughly. A sonomammography is usually performed in conjunction with a mammography in order to study a lump or a mass in the breast tissue. The first stage of breast screening is called a mammogram. A mammogram is a low-dose x-ray of each breast used to identify tumors and other abnormalities.. Early detection also helps in improving the chances of survival.