Certain MRI exams require an injection of a contrast material called gadolinium, which helps identify certain anatomic structures on the scan images.

Sometimes a substance called gadolinium is injected into a vein.

A substance called gadolinium is injected into the patient through a vein.

A substance called gadolinium may be injected into a vein.

Recently, the dancer had a follow-up M.R.I. using a new contrast agent called gadolinium, a technique still in clinical trial.