what is the diffrence between radiology and radiography

A radiologist is a doctor who is a medical imaging specialist. You need to go to medical school and then specialise after medical school and the two foundation years to become a radiologist. Radiographers have two flavours: therapeutic and diagnostic. Diagnostic radiographers operate the machinery which gives medical images i.e. CT, MRI, ultrasound, 2D x-rays, etc..., therapeutic radiographers operate machinery to treat cancer and some benign conditions generally with MV x-rays (but not always) , they also operator MRI and CT scanners for planning purposes, can plan treatments, and can specialise to review patients and prescribe certain medications.