SEARCH Articles Figures Tables Contrast agent Contrast agent for MRI Contrasting agent Gadolinium Complexes as MRI Contrast Agents for Diagnosis Gd(III)-loaded porous systems as MRI contrast agents MRI Magnetic resonance imaging (MRI contrast agents Metal Chelates as MRI Contrast Agents NMR Relaxivity Properties Applications of Sol-Gel Procedures in MRI Contrast Agents Silica Coatings of Magnetic Nanoparticles for MRI Contrast Agents The Role of Magnetic Nanoparticle-Based Contrast Agents in MRI