Check out the Web site of the American Society of Radiologic Technologists, www.asrt.org. It has a career section that talks about salaries and specialties in the field. With experience, you can move up into supervisory roles. You may also want to become proficient and licensed in other modalities, such as mammography, CT or MRI – that will boost your earning power. Training is usually on the job, although ultrasound may require additional schooling.