My brother went to college to become a radiologist and it took him 12 years of college to become a radiologist.
He said it was well worth it and being a radiologist he's higher up as a doctor when being a radiologist and makes more decisions than other doctors.
He loves being a radiologist and they will always be in demand as long as people are living and need doctor care.
So be prepared to stay in college for 12 years before you graduate college and can become a radiologist but in the end it's worth it.