Diagnostic medical sonographers use special equipment to direct safe, high frequency sound waves towards a particular part of the body. The echoes of those waves are collected and turned into moving images. The sonographer is trained to select particular images and record them for a physician to use in making a diagnosis or monitoring a medical condition, such as pregnancy. They may specialize in such areas as obstetrics and gynecological sonography, abdominal sonography, neurosonography, ophthalmological sonography, vascular technology, or echocardiography. Training for this career is at many two and four year colleges. Certification exams are available from The American Registry of Diagnostic Medical Sonographers. While theirs is a highly technical profession, diagnostic medical sonographers should have good people skills. Their duties may include keeping patient records, maintaining equipment and preparing work schedules.