Are there other approved MRI contrast agents that do not contain gadolinium?
Yes. However, the two other approved MRI contrast agents, Feridex, I.V. (an iron-containing injectable solution) and Teslascan (a manganese-containing injectable solution) are FDA-approved only for the evaluation of lesions of the liver. Imaging contrast agents, such as iodinated contrast agents are used in Computed Tomography, plain X-ray and X-ray angiography. However, these iodinated contrast agents require X-ray imaging rather than MRI. These agents also have serious risks such as anaphylaxis (a severe and life-threatening allergic reaction) and kidney damage.
