There are training and certificate programs for radiology techs that take around a year, as well as associate’s and bachelor’s degrees that take anywhere from two to four years. The best credentials are a combination of formal training, a professional license, and work experience.here are training and certificate programs for radiology techs that take around a year, as well as associate’s and bachelor’s degrees that take anywhere from two to four years. The best credentials are a combination of formal training, a professional license, and work experience.