Background: Ultrasmallsuperparamagnetic iron oxide (USPIO) nanoparticles are used as blood pool contrast agent for magnetic resonance angiography and perfusion imaging. Our aim in this study was to investigate the effect of the two coating types of iron oxide nanoparticles on the relationship between nanoparticles concentration and signal intensity (SI) in T1-weighted MR images.   Methods : D...

PURPOSE A T1-weighted multishot inversion-recovery (IR) echo-planar MR imaging (EPI) sequence was developed to improve intracranial tissue differentiation; its diagnostic utility was compared with that of conventional axial T1-weighted spin-echo and axial T2-weighted turbo spin-echo sequences. METHODS Eighteen patients with known or suspected primary or metastatic brain neoplasia were imaged ...

A major drawback of 3D time-of-flight (TOF) sequences is progressive saturation of inflowing spins along the slab direction, and a sufficient long TR or shaped excitation pulses are required to compensate for this. Here we present a new TOF technique based on a combination of selective inversion and 3D acquisition with TrueFISP. The stationary tissue is partially suppressed by the inversion pul...

One of the most challenging problems in electromagnetic (EM) geophysical methods is developing fast and stable methods of EM modeling and inversion for 3-D inhomo­ geneous geoelectrical structures. In this paper I present an overview of the research conducted by the Consortium for Electromagnetic Modeling and Inversion (CEMI) at the University of Utah on developing fast forward mod­ eling and i...