Abstract #1224

Contrast Reagent Detection Sensitivity Increases with B0: 3T and 7 T Comparisons of Human Head

William D. Rooney¹, Manoj K. Sammi¹, John Grinstead¹,², Jim Pollaro¹, Audrey H. Selzer¹, Xin Li¹, Charles Springer¹

¹Advanced Imaging Research Center, Oregon Health & Science University, Portland, OR, United States; ²Siemens Healthcare USA, Malverne, PA, United States

Contrast reagents (CR) find widespread use in MRI and an important consideration in ultra-high field MRI relates to CR detection sensitivity. The purpose of this study was to quantify the detection sensitivity of a low molecular weight gadolinium based CR at 3T and 7T in human head tissue. Twelve subjects were studied at 3T and 7T using a dynamic contrast enhanced MRI protocol with quantitative measurement of tissue water proton longitudinal relaxation rate constants. We find significantly better CR detection sensitivity at 7T compared to 3T.