Publications de Rolf Gruetter | EPFL Graph Search

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Hyperpolarized [1-13C]pyruvate enables direct in vivo assessment of real-time liver enzymatic activities by 13C magnetic resonance. However, the technique usually requires the injection of a highly supraphysiological dose of pyruvate. We herein demonstrate ...

The aim of this study is to perform a thorough comparison of quantitative susceptibility mapping (QSM) techniques and their dependence on the assumptions made. The compared methodologies were: two iterative single orientation methodologies minimizing the l ...

Glutamine has multiple roles in brain metabolism and its concentration can be altered in various pathological conditions. An accurate knowledge of its concentration is therefore highly desirable to monitor and study several brain disorders in vivo. However ...

To date, functional 1H NMR spectroscopy has been utilized to report the time courses of few metabolites, primarily lactate. Benefiting from the sensitivity offered by ultra-high magnetic field (7 T), the concentrations of 17 metabolites were measured in th ...

Reliable quantification of the macromolecule signals in short echo-time H-1 MRS spectra is particularly important at high magnetic fields for an accurate quantification of metabolite concentrations (the neurochemical profile) due to effectively increased s ...

Patients with diabetes display a progressive decay in the physiological counter-regulatory response to hypoglycemia, resulting in hypoglycemia unawareness. The mechanism through which the brain adapts to hypoglycemia may involve brain glycogen. We tested t ...

PURPOSE: Modification of a clinical MRI scanner to enable simultaneous or rapid interleaved acquisition of signals from two different nuclei. METHODS: A device was developed to modify the local oscillator signal fed to the receive channel(s) of an MRI cons ...

Objective To evaluate a transverse electromagnetic (TEM), a circularly polarized (CP) (birdcage), and a 12-channel phased array head coil at the clinical field strength of B (0) = 3T in terms of signal-to-noise ratio (SNR), signal homogeneity, and maps of ...

MR structural T1-weighted imaging using high field systems (>3T) is severely hampered by the existing large transmit field inhomogeneities. New sequences have been developed to better cope with such nuisances. In this work we show the potential of a recent ...

The relaxivity of commercially available gadolinium (Gd)-based contrast agents was studied for X-nuclei resonances with long intrinsic relaxation times ranging from 6 s to several hundred seconds. Omniscan in pure 13C formic acid had a relaxivity of 2.9 mM ...

Physiological noise often dominates the blood-oxygen level-dependent (BOLD) signal fluctuations in high-field functional MRI (fMRI) data. Therefore, to optimize fMRI protocols, it becomes crucial to investigate how physiological signal fluctuations impact ...

Rolf Gruetter

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[13C]bicarbonate labelled from hyperpolarized [1-13C]pyruvate is an in vivo marker of hepatic gluconeogenesis in fasted state

A Modulated Closed Form solution for Quantitative Susceptibility Mapping - A thorough evaluation and comparison to iterative methods based on edge prior knowledge

Optimized MEGA-SPECIAL for in vivo glutamine detection in the rat brain at 14.1 T

A Developmental In Vivo 1 H Nmr Study In Mice With Genetic Redox Dysregulation: An Animal Model With Relevance To Schizophrenia

Sustained neuronal activation raises oxidative metabolism to a new steady-state level: Evidence from 1H NMR spectroscopy in the human visual cortex

Quantification of in vivo short echo-time proton magnetic resonance spectra at 14.1 T using two different approaches of modelling the macromolecule spectrum

Metabolism of [1,6-C-13]glucose in glutamatergic and GABAergic compartments in vivo in the rat brain

Investigating mitochondrial biomarkers and function using MRS at 14.1 Tesla in a mouse model of mood disorders

Glycogen Supercompensation in the Rat Brain After Acute Hypoglycemia is Independent of Glucose Levels During Recovery

MAGNETIC RESONANCE AND BIOLUMINESCENCE IMAGING MONITOR QUANTITATIVE DIFFERENCES IN PANCREATIC ISLETS AND THEIR REGENERATION AFTER BETA CELL LOSS

Simultaneous and interleaved acquisition of NMR signals from different nuclei with a clinical MRI scanner

The metabolic effect of hyperpolarized [1-13C]acetate dosage in vivo

Brain Regional Susceptibility to Oxidative Stress in a Rat Model of Chronic Hepatic Encephalopathy: In-Vivo 1H MRS, Ex-Vivo ESR Spectroscopy and Histology Findings

Metabolism of [1,6-C-13] glucose in glutamatergic and GABAergic compartments in vivo in the rat brain

Comparison of three commercially available radio frequency coils for human brain imaging at 3 Tesla

Assessment Of Cerebral Osmotic Regulation In A Rat Model Of Biliary Cirrhosis Using MR Spectroscopy

New Developments and Applications of the MP2RAGE Sequence - Focusing the Contrast and High Spatial Resolution R1 Mapping

Relaxivity of Gd-based contrast agents on X nuclei with long intrinsic relaxation times in aqueous solutions

Influence of physiological noise on accelerated 2D and 3D resting state functional MRI data at 7 T

Effects of Lactoferrin on altered brain metabolism in pup rats after prenatal exposure to Dexamethasone