i am interested in learning more about radiology, the sceince that uses medical imaging to diagnose and treat diseases within the body
That sounds like it would be interesting to study! What types of machines do they use for radiology? 
there are a variety of imaging techniques used such as x-ray radiography, ultrasound, computed tomograpgy (CT)
Neat! Do you have to get a college degree to be a radiologist?
well a diagnostic radiologist is a trained doctor.  he interprets or "reads" the images and produces a report of their findings and impression or diagnosis 
Oh wow! So yes, a lot of training is required! Do you know when radiology was first available?
not exactly but radiographers and medical radiation technologist are healthcare professionals who specialise in the imaging of human anatomy for the diagnosis and treatment of pathology.