Search Results - "Ruhm, Loreen"

Mapping of glutamate metabolism using 1H FID-MRSI after oral administration of [1-13C]Glc at 9.4 T by Ziegs, Theresia, Ruhm, Loreen, Wright, Andrew, Henning, Anke

“…•Labeling effects in metabolites after oral intake of [1-13C]Glc in human brain.•High temporal and spatial resolution could be achieved using 1H-FID-MRSI at…”
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Deuterium metabolic imaging in the human brain at 9.4 Tesla with high spatial and temporal resolution by Ruhm, Loreen, Avdievich, Nikolai, Ziegs, Theresia, Nagel, Armin M., De Feyter, Henk M., de Graaf, Robin A., Henning, Anke

“…To present first highly spatially resolved deuterium metabolic imaging (DMI) measurements of the human brain acquired with a dedicated coil design and a fast…”
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Feasibility of deuterium magnetic resonance spectroscopy of 3-O-Methylglucose at 7 Tesla by Hartmann, Benedikt, Müller, Max, Seyler, Lisa, Bäuerle, Tobias, Wilferth, Tobias, Avdievitch, Nikolai, Ruhm, Loreen, Henning, Anke, Lesiv, Alexei, Ivashkin, Pavel, Uder, Michael, Nagel, Armin M

“…Deuterium Magnetic Resonance Spectroscopy (DMRS) is a non-invasive technique that allows the detection of deuterated compounds in vivo. DMRS has a large…”
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Improving the Effective Spatial Resolution in 1H-MRSI of the Prostate with Three-Dimensional Overdiscretized Reconstructions by Tenbergen, Carlijn J. A., Ruhm, Loreen, Ypma, Sjoerd, Heerschap, Arend, Henning, Anke, Scheenen, Tom W. J.

“…In in vivo 1H-MRSI of the prostate, small matrix sizes can cause voxel bleeding extending to regions far from a voxel, dispersing a signal of interest outside…”
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Measurement of glucose metabolism in the occipital lobe and frontal cortex after oral administration of [1-13C]glucose at 9.4 T by Ziegs, Theresia, Dorst, Johanna, Ruhm, Loreen, Avdievitch, Nikolai, Henning, Anke

“…For the first time, labeling effects after oral intake of [1-13C]glucose are observed in the human brain with pure 1H detection at 9.4 T. Spectral time series…”
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Mapping of glutamate metabolism using 1H FID-MRSI after oral administration of 1-13CGlc at 9.4 T by Ziegs, Theresia, Ruhm, Loreen, Wright, Andrew, Henning, Anke

“…Glutamate is the major excitatory transmitter in the brain and malfunction of the related metabolism is associated with various neurological diseases and…”
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Comparison of four 31P single‐voxel MRS sequences in the human brain at 9.4 T by Dorst, Johanna, Ruhm, Loreen, Avdievich, Nikolai, Bogner, Wolfgang, Henning, Anke

“…Purpose In this study, different single‐voxel localization sequences were implemented and systematically compared for the first time for phosphorous MRS…”
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Phosphorus transversal relaxation times and metabolite concentrations in the human brain at 9.4 T by Dorst, Johanna, Borbath, Tamas, Ruhm, Loreen, Henning, Anke

“…A method to estimate phosphorus (31P) transversal relaxation times (T2s) of coupled spin systems is demonstrated. Additionally, intracellular and extracellular…”
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Unshielded bent folded‐end dipole 9.4 T human head transceiver array decoupled using modified passive dipoles by Avdievich, Nikolai I., Solomakha, Georgiy, Ruhm, Loreen, Henning, Anke, Scheffler, Klaus

“…Purpose To develop an unshielded dipole transceiver array for human head imaging at 9.4 Tesla and to improve decoupling of adjacent dipole elements, a novel…”
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3D 31P MRSI of the human brain at 9.4 Tesla: Optimization and quantitative analysis of metabolic images by Ruhm, Loreen, Dorst, Johanna, Avdievitch, Nikolai, Wright, Andrew Martin, Henning, Anke

“…Purpose To present 31P whole brain MRSI with a high spatial resolution to probe quantitative tissue analysis of 31P MRSI at an ultrahigh field strength of 9.4…”
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Joint learning of nonlinear representation and projection for fast constrained MRSI reconstruction by Li, Yahang, Ruhm, Loreen, Wang, Zepeng, Zhao, Ruiyang, Anderson, Aaron, Arnold, Paul, Huesmann, Graham, Henning, Anke, Lam, Fan

“…To develop and evaluate a novel method for computationally efficient reconstruction from noisy MR spectroscopic imaging (MRSI) data. The proposed method…”
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Bent folded‐end dipole head array for ultrahigh‐field MRI turns “dielectric resonance” from an enemy to a friend by Avdievich, Nikolai I., Solomakha, Georgiy, Ruhm, Loreen, Bause, Jonas, Scheffler, Klaus, Henning, Anke

“…Purpose To provide transmit whole‐brain coverage at 9.4 T using an array with only eight elements and improve the specific absorption rate (SAR) performance, a…”
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A 32‐element loop/dipole hybrid array for human head imaging at 7 T by Avdievich, Nikolai I., Nikulin, Anton V., Ruhm, Loreen, Magill, Arthur W., Glang, Felix, Henning, Anke, Scheffler, Klaus

“…Purpose To improve whole‐brain SNR at 7 Tesla, a novel 32‐element hybrid human head array coil was developed, constructed, and tested. Methods Our general…”
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Decoupling of folded‐end dipole antenna elements of a 9.4 T human head array using an RF shield by Avdievich, Nikolai I., Solomakha, Georgiy, Ruhm, Loreen, Scheffler, Klaus, Henning, Anke

“…Dipole antennas have recently been introduced to the field of MRI and successfully used, mostly as elements of ultra‐high field (UHF, ≥ 7 T) human body arrays…”
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Evaluation of short folded dipole antennas as receive elements of ultra‐high‐field human head array by Avdievich, Nikolai I., Solomakha, Georgiy, Ruhm, Loreen, Scheffler, Klaus, Henning, Anke

“…Purpose To improve the receive (Rx) performance of a human head transceiver (TxRx) array at 9.4T without compromising its transmit (Tx) performance, a novel…”
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3D 31 P MRSI of the human brain at 9.4 Tesla: Optimization and quantitative analysis of metabolic images by Ruhm, Loreen, Dorst, Johanna, Avdievitch, Nikolai, Wright, Andrew Martin, Henning, Anke

“…PURPOSETo present 31 P whole brain MRSI with a high spatial resolution to probe quantitative tissue analysis of 31 P MRSI at an ultrahigh field strength of 9.4…”
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9.4T double‐tuned 13C/1H human head array using a combination of surface loops and dipole antennas by Avdievich, Nikolai I, Solomakha, Georgiy, Ruhm, Loreen, Henning, Anke, Scheffler, Klaus

“…MRI at ultra‐high field (UHF, ≥7 T) provides a natural strategy for improving the quality of X‐nucleus magnetic resonance spectroscopy and imaging due to the…”
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9.4 T double-tuned 13 C/ 1 H human head array using a combination of surface loops and dipole antennas by Avdievich, Nikolai I, Solomakha, Georgiy, Ruhm, Loreen, Henning, Anke, Scheffler, Klaus

“…MRI at ultra-high field (UHF, ≥7 T) provides a natural strategy for improving the quality of X-nucleus magnetic resonance spectroscopy and imaging due to the…”
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9.4 T double‐tuned 13C/1H human head array using a combination of surface loops and dipole antennas by Avdievich, Nikolai I., Solomakha, Georgiy, Ruhm, Loreen, Henning, Anke, Scheffler, Klaus

“…MRI at ultra‐high field (UHF, ≥7 T) provides a natural strategy for improving the quality of X‐nucleus magnetic resonance spectroscopy and imaging due to the…”
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Double-tuned 31 P/ 1 H human head array with high performance at both frequencies for spectroscopic imaging at 9.4T by Avdievich, Nikolai I, Ruhm, Loreen, Dorst, Johanna, Scheffler, Klaus, Korzowski, Andreas, Henning, Anke

“…To develop a robust design of a human head double-tuned P/ H array, which provides good performance at both P and H frequencies for MR spectroscopic imaging at…”
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