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

Related publications (78)

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Holographic memory with localized recording

Demetri Psaltis

We experimentally demonstrate and characterize a memory module that features selective page erasure and readout persistence using the localized recording method in doubly doped LiNbO3. Pages of information can be selectively erased without partially erasin ...

2001

SNR performance of an adaptive sigma delta modulator

Ali H. Sayed

In a previous study, we proposed an adaptive sigma delta modulator with improved dynamic range. The modulator adapts the step size of the quantizer from estimates of the quantizer input instead of the modulator input. In this study, we conduct an error var ...

2001

The pixel size limit for a holographic memory system

Demetri Psaltis, Wei Liu

Compact holographic memory architecture with phase conjugate readout and diffraction suppression by internal reflection is investigated. The pixel size requirement for a competitive system is determined. The bandwidth of the holographic recording in LiNbO3 ...

Spie-Int Soc Optical Engineering, Po Box 10, Bellingham, Wa 98227-0010 Usa1999

Pixel size limit in holographic memories

Demetri Psaltis, Wei Liu

The bandwidth of holographic recording in LiNbO3 (Fe doped) in the 90 degrees geometry is studied theoretically and experimentally. The wide holographic bandwidth of LiNbO3 makes it possible to record submicrometer pixels and reconstruct them by phase conj ...

1999

Improving the signal-to-noise ratio of femtosecond luminescence upconversion by multichannel detection

Benoît Marie Joseph Deveaud

We have improved the sensitivity and signal-to-noise ratio of a luminescence upconversion experiment, using a charge-coupled device (CCD) as the detector. We show experimentally and numerically that the bandwidth of a 1-mm-thick beta-barium berate crystal ...

1998

Broadband decoupled, 1H-localized 13C MRS of the human brain at 4 Tesla

Rolf Gruetter

Broadband proton decoupling of the entire 13C spectrum was possible within power absorption guidelines and resulted in the detection of narrow (as low as 2-3 Hz), natural abundance signals from metabolites such as myo- inositol, glutamate, N-acetyl-asparta ...

1996

Cross-Talk In Phase-Coded Holographic Memories

Demetri Psaltis

The cross talk between holograms multiplexed with Walsh-Hadamard phase codes is analyzed. Each hologram is stored with a reference beam that consists of N phase-coded plane waves. The signal-to-noise ratio (SNR) is calculated for a recording schedule for w ...

1993

Cross-Talk In Wavelength-Multiplexed Holographic Memories

Demetri Psaltis

The cross talk between wavelength-multiplexed holograms is analyzed- The signal-to-noise ratio (SNR) is calculated for a recording schedule that places the center of each image at the null (in wavelength space) of the adjacent hologram. An asymptotic close ...

1993