The following links will help you understand more about Diagnostic Radiology:

Radiography (x-ray)

Ultrasound

CT (computed tomography)

Mammogram

MRI (Magnetic Resonance Imaging)

Nuclear Medicine

PET scan (Positron emission tomography)

The following links will help you understand more about Interventional Radiology:

Interventional Radiology

Endovascular Coiling Treatment for Brain Aneurysms

Vertebroplasty

Interventional Neuroradiology

Angioplasty & Stent Placement

Uterine Fibroid Embolization