Introduction: Local Tissue Sodium Concentration (TSC) levels could serve as a biomarker for tissue viability and integrity in stroke [1] and tumor [2]. It is therefore anticipated that TSC measurements can also help to diagnose renal diseases, since vascular sodium concentration is regulated by the corticomedullary sodium concentration gradient [3,4]. However, the SNR in Na Magnetic Resonance I...

Introduction Transition-band balanced steady-state free precession (TB-bSSFP) fMRI has been shown promising for mapping brain activation with high resolution and distortionfree images [1]. However, the narrow functional-sensitivity band of transition-band SSFP fMRI leads to serious instability in spatial and temporal field, even with advanced shimming [1-2]. Previous studies have proposed a sli...

Introduction: Time resolved magnetic resonance angiography (trMRA) allows dynamic anatomic assessment of large vessels, while dynamic contrast enhanced MRI (DCE-MRI) assesses small vessels, providing a quantitative measurement of tissue perfusion. Typically these require two doses of contrast and two separate acquisitions. If both analyses could be performed in a single acquisition, large vesse...

We recently provided an updated theory of the role of posterior ventral right inferior frontal cortex (hereafter rIFC) in inhibitory response control (Aron et al., 2014). We claimed that when rIFC is triggered by a stop signal, unexpected event or endogenous rule, it engages a brake; i.e., it slows, pauses, or completely stops an action via one or more rIFC-based fronto-basal-ganglia networks. ...

Introduction: Quantitative T2 (qT2) enables scientists to discern tissue microcompartments by measuring multiple T2 decays using a multiecho acquisition [1]. This technique is sensitive to myelin content [2] and has uncovered previously undetected microcompartments in MS and PKU pathological tissue [3]. We show that traditional qT2 analysis using a smoothing constraint underestimates the myelin...

Introduction In our previous studies, we demonstrated cortical plasticity and recovery of the sensory-motor cortex of the rat following peripheral nerve injury and repair (1, 2) using fMRI and direct nerve stimulation. Monitoring the plasticity of the cortex is problematic due to the loss of input following nerve injury and the slow regenerative rate of nerve fibers. No functional data are obta...

E. Staroswiecki, K. L. Granlund, M. T. Alley, G. E. Gold, and B. A. Hargreaves Radiology, Stanford University, Stanford, California, United States, Electrical Engineering, Stanford University, Stanford, California, United States INTRODUCTION: The visualization of articular cartilage is a challenging problem that requires advanced MRI techniques. In order to follow the changes to tissue in early...

Harmonic Phase (HARP) analysis of MR tagging was proposed for fast and automated assessment of myocardium kinematics. In this study, its outcome was evluated in a rat model of myocadial infarction with comparsion to maunally based approach. The results indicated that manual and HARP analysis exhibited a good concordance in assessing alterations in myocaridium wall motion despite the fact that t...

Introduction MR-based Acoustic Radiation Force (MR-ARFI) has been recently proposed as a tool for the targeting, monitoring and assessment of focused ultrasound (FUS) therapy [16]. Several bipolar encoding schemes have been introduced for spin echo based MR-ARFI [3-5](Fig. 1). The purpose of this work was to evaluate the performance of three encoding schemes by modeling and experimentally testi...

qualitative analysis of petroleum reservoir rocks is still one of the most important topics of core laboratories and directly affects hydrocarbon-in-place, fluid flow, and prediction of field performance. magnetic resonance imaging (mri) as a non-invasive, millimeter resolution technique which only images fluids in porous media fits this purpose perfectly. magnetic resonance is a radio frequenc...