Search Results - "Avdievich, Nikolai I."

Safety testing and operational procedures for self-developed radiofrequency coils by Hoffmann, Jens, Henning, Anke, Giapitzakis, Ioannis A., Scheffler, Klaus, Shajan, G., Pohmann, Rolf, Avdievich, Nikolai I.

“…The development of novel radiofrequency (RF) coils for human ultrahigh‐field (≥7 T), non‐proton and body applications is an active field of research in many MR…”
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Signal‐to‐noise ratio versus field strength for small surface coils by Pohmann, Rolf, Avdievich, Nikolai I., Scheffler, Klaus

“…The increasing signal‐to‐noise ratio (SNR) is the main reason to use ultrahigh field MRI. Here, we investigate the dependence of the SNR on the magnetic field…”
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Molecular Features of the Copper Binding Sites in the Octarepeat Domain of the Prion Protein by Burns, Colin S, Aronoff-Spencer, Eliah, Dunham, Christine M, Lario, Paula, Avdievich, Nikolai I, Antholine, William E, Olmstead, Marilyn M, Vrielink, Alice, Gerfen, Gary J, Peisach, Jack, Scott, William G, Millhauser, Glenn L

“…Recent evidence suggests that the prion protein (PrP) is a copper binding protein. The N-terminal region of human PrP contains four sequential copies of the…”
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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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Identification of the Cu2+ Binding Sites in the N-Terminal Domain of the Prion Protein by EPR and CD Spectroscopy by Aronoff-Spencer, Eliah, Burns, Colin S, Avdievich, Nikolai I, Gerfen, Gary J, Peisach, Jack, Antholine, William E, Ball, Haydn L, Cohen, Fred E, Prusiner, Stanley B, Millhauser, Glenn L

“…Recent evidence indicates that the prion protein (PrP) plays a role in copper metabolism in the central nervous system. The N-terminal region of human PrP…”
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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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Reconfigurable dipole receive array for dynamic parallel imaging at ultra‐high magnetic field by Nikulin, Anton V., Glang, Felix, Avdievich, Nikolai I., Bosch, Dario, Steffen, Theodor, Scheffler, Klaus

“…Purpose To extend the concept of 3D dynamic parallel imaging, we developed a prototype of an electronically reconfigurable dipole array that provides…”
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Ultrahigh‐resolution quantitative spinal cord MRI at 9.4T by Geldschläger, Ole, Bosch, Dario, Avdievich, Nikolai I., Henning, Anke

“…Purpose To present the results of the first human spinal cord in vivo MRI scans at 9.4T. Methods A human brain coil was used to image the human spinal cord at…”
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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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Transceiver-Phased Arrays for Human Brain Studies at 7 T by Avdievich, Nikolai I.

“…The paper describes technological advances in high-field (7 T) transceiver-phased arrays developed for magnetic resonance imaging of the human brain. The first…”
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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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Dynamic parallel imaging at 9.4 T using reconfigurable receive coaxial dipoles by Solomakha, Georgiy A, Glang, Felix, Bosch, Dario, Steffen, Theodor, Scheffler, Klaus, Avdievich, Nikolai I

“…Parallel imaging is one of the key MRI technologies that allow reduction of image acquisition time. However, the parallel imaging reconstruction commonly leads…”
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Electromagnetic simulation of a 16‐channel head transceiver at 7 T using circuit‐spatial optimization by Li, Xin, Pan, Jullie W., Avdievich, Nikolai I., Hetherington, Hoby P., Rispoli, Joseph V.

“…Purpose With increased interest in parallel transmission in ultrahigh‐field MRI, methods are needed to correctly calculate the S‐parameters and complex field…”
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Relaxation-corrected macromolecular model enables determination of 1 H longitudinal T 1 -relaxation times and concentrations of human brain metabolites at 9.4T by Wright, Andrew Martin, Murali-Manohar, Saipavitra, Borbath, Tamas, Avdievich, Nikolai I, Henning, Anke

“…Ultrahigh field MRS has improved characterization of the neurochemical profile. To compare results obtained at 9.4T to those from lower field strengths, it is…”
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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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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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Double‐tuned 31P/1H 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

“…Purpose To develop a robust design of a human head double‐tuned 31P/1H array, which provides good performance at both 31P and 1H frequencies for MR…”
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Double‐row 18‐loop transceive–32‐loop receive tight‐fit array provides for whole‐brain coverage, high transmit performance, and SNR improvement near the brain center at 9.4T by Avdievich, Nikolai I., Giapitzakis, Ioannis‐Angelos, Bause, Jonas, Shajan, Gunamony, Scheffler, Klaus, Henning, Anke

“…Purpose To improve the transmit (Tx) and receive (Rx) performance of a human head array and provide whole‐brain coverage at 9.4T, a novel 32‐element array…”
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Double-row 16-element folded-end dipole transceiver array for 3D RF shimming of the whole human brain at 9.4 T by Nikulin, Anton V, Bosch, Dario, Solomakha, Georgiy A, Glang, Felix, Scheffler, Klaus, Avdievich, Nikolai I

“…Homogeneity and longitudinal coverage of transmit (Tx) human head RF coils at ultrahigh field (UHF, ≥7 T) can be improved by 3D RF shimming, which requires…”
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