Table 1.

Current or previously approved gadolinium-based contrast agents and their manufacturer, chemical structure and ionicity, American College of Radiology classification, and Canadian Association of Radiologists risk assessment

Gadolinium Agent	Manufacturer	Chemical Structure	ACR Classification	CAR Risk Assessment
Gadodiamide	GE Healthcare	Linear nonionic	Group 1	High risk
Gadoversetamide	Guerbet	Linear nonionic	Group 1	High risk
Gadopentetate dimeglumine	Bayer AG	Linear ionic	Group 1	High risk
Gadobutrol	Bayer Healthcare/Bayer AG	Macrocyclic nonionic	Group 2	Low risk
Gadoteridol	Bracco Diagnostics	Macrocyclic nonionic	Group 2	Low risk
Gadoterate meglumine	Guerbet	Macrocyclic ionic	Group 2	Low risk
Gadobenate dimeglumine	Bracco Diagnostics	Linear ionic	Group 2	Medium risk
Gadoxetate disodium	Bayer Healthcare	Linear ionic	Group 3	Medium risk

ACR, American College of Radiology; CAR, Canadian Association of Radiologists.