Ultrasound technicians, also known as diagnostic medical sonographers, use high-frequency sound waves to create images of soft tissue in a patient's body.Physicians use these images to diagnose abnormalities and diseases in a patient.s an ultrasound technician, you'll help assess a patient's health using medical equipment that captures images using sound waves. Whether you want to work in obstetrics or vascular care, you'll find a degree and certification that prepare you for this career.