Search Results - "Avdievich, N."

Evaluation of coaxial dipole antennas as transceiver elements of human head array for ultra‐high field MRI at 9.4T by Solomakha, G. A., Bosch, D., Glang, F., Scheffler, K., Avdievich, N. I.

“…Purpose The aim of this work is to evaluate a new eight‐channel transceiver (TxRx) coaxial dipole array for imaging of the human head at 9.4T developed to…”
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Evaluation of transmit efficiency and SAR for a tight fit transceiver human head phased array at 9.4 T by Avdievich, N.I., Hoffmann, J., Shajan, G., Pfrommer, A., Giapitzakis, I.A., Scheffler, K., Henning, A.

“…Ultra‐high field (UHF, ≥7 T) tight fit transceiver phased arrays improve transmit (Tx) efficiency (B1+/√P) in comparison with Tx‐only arrays, which are usually…”
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Combination of surface and ‘vertical’ loop elements improves receive performance of a human head transceiver array at 9.4 T by Avdievich, N.I., Giapitzakis, I.A., Pfrommer, A., Borbath, T., Henning, A.

“…Ultra‐high‐field (UHF, ≥7 T) human magnetic resonance imaging (MRI) provides undisputed advantages over low‐field MRI (≤3 T), but its development remains…”
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An array of paired folded-end dipoles for whole-brain imaging at 9.4 T by Popova, K.I., Glang, F., Bosch, D., Scheffler, K., Avdievich, N.I., Glybovski, S.B., Solomakha, G.A.

“…[Display omitted] •An array of composite elements based on paired folded-end dipoles could improve B1+ field in human homogeneity at 9.4 T.•The proposed array…”
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Analytical modeling provides new insight into complex mutual coupling between surface loops at ultrahigh fields by Avdievich, N. I., Pfrommer, A., Giapitzakis, I. A., Henning, A.

“…Ultrahigh‐field (UHF) (≥7 T) transmit (Tx) human head surface loop phased arrays improve both the Tx efficiency (B1+/√P) and homogeneity in comparison with…”
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Selective homonuclear polarization transfer for spectroscopic imaging of GABA at 7T by Pan, J. W., Duckrow, R. B., Spencer, D. D., Avdievich, N. I., Hetherington, H. P.

“…We develop and implement a selective homonuclear polarization transfer method for the detection of 3.0 ppm C‐4 GABA resonance by spectroscopic imaging in the…”
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Short echo spectroscopic imaging of the human brain at 7T using transceiver arrays by Avdievich, N.I., Pan, J.W., Baehring, J.M., Spencer, D.D., Hetherington, H.P.

“…Recent advances in magnet technology have enabled the construction of ultrahigh‐field magnets (7T and higher) that can accommodate the human head and body…”
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J-refocused coherence transfer spectroscopic imaging at 7 T in human brain by Pan, J.W., Avdievich, N., Hetherington, H.P.

“…Short echo spectroscopy is commonly used to minimize signal modulation due to J‐evolution of the cerebral amino acids. However, short echo acquisitions suffer…”
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OCCIPITAL LEVELS OF GABA ARE RELATED TO SEVERE HEADACHES IN MIGRAINE by BIGAL, M. E, HETHERINGTON, H, PAN, J, TSANG, A, GROSBERG, B, AVDIEVICH, N, FRIEDMAN, B, LIPTON, R. B

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Open half-volume quadrature transverse electromagnetic coil for high-field magnetic resonance imaging by Peshkovsky, A. S., Kennan, R. P., Fabry, M. E., Avdievich, N. I.

“…A half‐volume quadrature head transverse electromagnetic (TEM) coil has been constructed for 4 T imaging applications. This coil produces a sufficiently large…”
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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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Numerical and Experimental Evaluation of Short Folded Recieve-Only Dipoles for 9.4T Human Head Arrays by Solomakha, G., Glybovski, S., Melchakova, I., Hennig, A., Schefler, K., Avdievich, N.

“…Improvement of signal-to-noise ratio (SNR) is a critical step in designing any MRI radio frequency (RF) coil. Increasing the number of surface loops in a human…”
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Three-dimensional high-inductance birdcage coil for NQR applications by Peshkovsky, A.S., Cerioni, L., Osan, T.M., Avdievich, N.I., Pusiol, D.J.

“…A birdcage coil capable of operating simultaneously and independently in three orthogonal dimensions has been developed. A co-rotational end-ring mode…”
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Double‐row dipole/loop combined array for human whole brain imaging at 7 T by Avdievich, Nikolai I., Nikulin, Anton V., Ruhm, Loreen, Magill, Arthur W., Henning, Anke, Scheffler, Klaus

“…Important issues in designing radiofrequency (RF) coils for human head imaging at ultra‐high field (UHF; ≥7 T) are the inhomogeneity and longitudinal coverage…”
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Multifrequency Probe for Pulsed EPR and ENDOR Spectroscopy by Avdievich, Nikolai I., Gerfen, Gary J.

“…The design, construction, and performance of a multifrequency pulsed EPR and ENDOR probe for use at cryogenic temperatures are described. Interchangeable…”
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4 T Actively detuneable double-tuned 1H/ 31P head volume coil and four-channel 31P phased array for human brain spectroscopy by Avdievich, N.I., Hetherington, H.P.

“…Typically 31P in vivo magnetic resonance spectroscopic studies are limited by SNR considerations. Although phased arrays can improve the SNR; to date 31P…”
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Combination of surface and 'vertical' loop elements improves receive performance of a human head transceiver array at 9.4ￂ T by Avdievich, NI, Giapitzakis, IA, Pfrommer, A, Borbath, T, Henning, A

“…Ultra-high-field (UHF, ≥7 T) human magnetic resonance imaging (MRI) provides undisputed advantages over low-field MRI (≤3 T), but its development remains…”
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Role of Excited Singlet State in the Photooxidation of Carotenoids:  A Time-Resolved Q-Band EPR Study by Jeevarajan, A. S., Kispert, L. D., Avdievich, N. I., Forbes, M. D. E.

“…Spin-polarized 35 GHz time-resolved EPR (TREPR) spectra were obtained for the first time of the cation radicals of β-carotene (I), 15,15‘-didehydro-β-carotene…”
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Micorbiological control of the purification mechanism of water supply pump stations by means of the direct count method by AVDIEVICH, N M

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Lysis of Penicillium by Myxobacteriales by AVDIEVICH, N M

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