What is the definition or description of: magnetic resonance angiography?

Blood vessel imaging: The most simple description is: an MRI study that has been adjusted to specifically look at the anatomy associated with or involving the major blood vessels of the body. This usually involves a contrast agent (dye) that is injected during the study and a very specific protocol for the MRI (program). It gives the radiologist a lot more information regarding the blood vessels than a regular mri.