A sonographer, or diagnostic medical sonographer, uses diagnostic medical equipment to produce images of internal body parts. To become a sonographer, earn a high school diploma or GED certificate. Then, explore one of two paths: you can complete a certificate program in diagnostic medical sonography then secure a job that offers on-the-job training. Another path you can take to become a sonographer is to earn an associate of applied science in diagnostic medical sonography, then build on your education to advance your sonography career.