Gadolinium and Ferumoxytol MRI in Diagnosing Patients With Abnormalities in the Central Nervous System

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PRIMARY OBJECTIVES: I. To test if prior gadolinium administration affects vascular imaging using ferumoxytol. II. To test signal changes of T2*w multi-echo fast field echo (mFFE) scans before and after contrast agent injection. SECONDARY OBJECTIVES: I. To test if ferumoxytol affects gadolinium enhan...

PRIMARY OBJECTIVES: I. To test if prior gadolinium administration affects vascular imaging using ferumoxytol. II. To test signal changes of T2*w multi-echo fast field echo (mFFE) scans before and after contrast agent injection. SECONDARY OBJECTIVES: I. To test if ferumoxytol affects gadolinium enhanced MRI. II. To test if steady state cerebral blood volume (CBV) maps are different at various magnetic field strengths. EXPLORATORY OBJECTIVES: I. To explore late ferumoxytol enhancement (optional MRI) hours to days after ferumoxytol administration in various pathologies. II. To evaluate the effects of ferumoxytol on malignant and non-malignant lesions in head & neck, and liver lesions OUTLINE: Patients are randomized into 1 of 2 groups. GROUP I: Patients receive gadolinium intravenously (IV) and then ferumoxytol IV and undergo MRI over 60 minutes on day 1. GROUP II: Patients receive ferumoxytol IV and then gadolinium IV and undergo MRI over 60 minutes on day 1. After completion of study, patients are followed up at 2 and 6 weeks.

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