CONTRAST AGENT EVALUATION Overview on the efficacy and safety of gadobutrol: an MRI contrast agent for the CNS, body and vessels Contrast-enhanced MRI has become a mainstay of clinical imaging with unlimited applications. However, a limitation of conventional contrast agents in MRI is the insufficient signal-to-noise ratios due to relaxivity. Gadobutrol (1.0 mmol/ml), an extracellular macrocyclic contrast agent of high stability, is indicated for contrast-enhanced MRI of adults, adolescents and children 2 years of age and older. Gadobutrol offers increased T1 relaxivity, which improves MR image quality and clinical use of the technique. 1 KEYWORDS: contrast-enhanced MRA n contrast-enhanced MRI n CNS n Gadavist™ Juan E Gutierrez* , n gadobutrol n gadolinium-based contrast agent n Gadovist™ n kidney n liver Sara Koenig1 & Josy Breuer2 The use of gadolinium-based contrast agents As with other GBCAs, the paramagnetic 1University of Texas at San Antonio, (GBCAs) to improve MRI has been well qualities of the gadolinium ion shortens the Health Science Center 7703 Floyd Curl Drive, San Antonio, TX 78229-3900, established for over 20 years [1,2]. Unenhanced T1 relaxation times of nearby water protons USA MRI of the CNS, abdomen/pelvis, breast and and results in increased signal on T -weighted 2Bayer-Schering AG, Berlin, Germany 1 *Author for correspondence: vascular system has mainly been used to dis- images improving the lesion detection (sensitiv- Tel.: +1 210 567 1978 play/demarcate focal pathologies or areas of ity), characterization (specificity) and staging. Fax: +1 210 567 6464 stenosis; however, GBCAs have improved the Besides the registered trade name (GADAVIST®
[email protected] detection, characterization and visualization of Injection, USA and GADOVIST®, in the rest lesions involved in such pathologies, improving of the world, the generic name (gadobutrol) the diagnostic work-up, therapy planning and and the laboratory nomenclature (Gd-DO3A- monitoring evolution after therapeutic inter- butriol or ZK 135079) have been used in some ventions [3].