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?
Radiographer
Radiographers, also known as radiologic technologists, diagnostic radiographers and medical radiation technologists are healthcare professionals who specialise in the imaging of human anatomy for the diagnosis and treatment of pathology. Radiographers are infrequently, and almost always erroneously, known as "x-ray technicians." In countries that use the title "radiologic technologist" they are often informally referred to as "techs" in the clinical environment; this phrase has emerged in popular culture such as television programmes. The term "radiographer" can also refer to a
Radiology
Radiology is the medical specialty that uses medical imaging to diagnose and treat diseases within the human body.
A variety of imaging techniques such as X-ray radiography, ultrasound, computed tomography (CT), nuclear medicine including positron emission tomography (PET), and magnetic resonance imaging (MRI) are used to diagnose or treat diseases. Interventional radiology is the performance of usually minimally invasive medical procedures with the guidance of imaging technologies such as X-ray radiography, ultrasound, computed tomography (CT), nuclear