The Experts below are selected from a list of 126 Experts worldwide ranked by ideXlab platform

Ergin Atalar - One of the best experts on this subject based on the ideXlab platform.

  • miniaturized Fiber Optic transmission system for mri signals
    Magnetic Resonance in Medicine, 2008
    Co-Authors: Omer Gokalp Memis, Yigitcan Eryaman, Orhan Aytur, Ergin Atalar
    Abstract:

    Conventional MRI instruments transmit received MRI signals through electrical cables. Although this design has proved to be effective over the years, we report a Fiber-Optic system that addresses the needs of recent developments in MRI technology. One of these technologies is phased array coils with a high number of elements, where total size of interconnections is a primary problem, and other problem is internal MRI coils, where there is a need for improvements in safety. The Miniature FiberOptic Transmission (FOT) System was developed to address these issues. The system consists of a receiver coil with active detuning, a low-noise preamplifier, and a laser diode connected to a photodetector with Fiber-Optic Cabling. The overall noise figure of the system is lower than 1 dB. Total power consumption is 50 mW, and the device is switchable with another FiberOptic line, which can also control active detuning. A prototype device was tested in a GE 1.5 Tesla MRI scanner, and several images were acquired with a signal to noise ratio similar to coaxial Cabling. We believe that this design will reduce the Cabling problems of arrays and enable placement of internal coils into body cavities with no safety hazard to the patient, such as electrical shock or burns. Magn Reson Med 59: 165–173, 2008. © 2007 Wiley-Liss, Inc.

Omer Gokalp Memis - One of the best experts on this subject based on the ideXlab platform.

  • miniaturized Fiber Optic transmission system for mri signals
    Magnetic Resonance in Medicine, 2008
    Co-Authors: Omer Gokalp Memis, Yigitcan Eryaman, Orhan Aytur, Ergin Atalar
    Abstract:

    Conventional MRI instruments transmit received MRI signals through electrical cables. Although this design has proved to be effective over the years, we report a Fiber-Optic system that addresses the needs of recent developments in MRI technology. One of these technologies is phased array coils with a high number of elements, where total size of interconnections is a primary problem, and other problem is internal MRI coils, where there is a need for improvements in safety. The Miniature FiberOptic Transmission (FOT) System was developed to address these issues. The system consists of a receiver coil with active detuning, a low-noise preamplifier, and a laser diode connected to a photodetector with Fiber-Optic Cabling. The overall noise figure of the system is lower than 1 dB. Total power consumption is 50 mW, and the device is switchable with another FiberOptic line, which can also control active detuning. A prototype device was tested in a GE 1.5 Tesla MRI scanner, and several images were acquired with a signal to noise ratio similar to coaxial Cabling. We believe that this design will reduce the Cabling problems of arrays and enable placement of internal coils into body cavities with no safety hazard to the patient, such as electrical shock or burns. Magn Reson Med 59: 165–173, 2008. © 2007 Wiley-Liss, Inc.

Yigitcan Eryaman - One of the best experts on this subject based on the ideXlab platform.

  • miniaturized Fiber Optic transmission system for mri signals
    Magnetic Resonance in Medicine, 2008
    Co-Authors: Omer Gokalp Memis, Yigitcan Eryaman, Orhan Aytur, Ergin Atalar
    Abstract:

    Conventional MRI instruments transmit received MRI signals through electrical cables. Although this design has proved to be effective over the years, we report a Fiber-Optic system that addresses the needs of recent developments in MRI technology. One of these technologies is phased array coils with a high number of elements, where total size of interconnections is a primary problem, and other problem is internal MRI coils, where there is a need for improvements in safety. The Miniature FiberOptic Transmission (FOT) System was developed to address these issues. The system consists of a receiver coil with active detuning, a low-noise preamplifier, and a laser diode connected to a photodetector with Fiber-Optic Cabling. The overall noise figure of the system is lower than 1 dB. Total power consumption is 50 mW, and the device is switchable with another FiberOptic line, which can also control active detuning. A prototype device was tested in a GE 1.5 Tesla MRI scanner, and several images were acquired with a signal to noise ratio similar to coaxial Cabling. We believe that this design will reduce the Cabling problems of arrays and enable placement of internal coils into body cavities with no safety hazard to the patient, such as electrical shock or burns. Magn Reson Med 59: 165–173, 2008. © 2007 Wiley-Liss, Inc.

Orhan Aytur - One of the best experts on this subject based on the ideXlab platform.

  • miniaturized Fiber Optic transmission system for mri signals
    Magnetic Resonance in Medicine, 2008
    Co-Authors: Omer Gokalp Memis, Yigitcan Eryaman, Orhan Aytur, Ergin Atalar
    Abstract:

    Conventional MRI instruments transmit received MRI signals through electrical cables. Although this design has proved to be effective over the years, we report a Fiber-Optic system that addresses the needs of recent developments in MRI technology. One of these technologies is phased array coils with a high number of elements, where total size of interconnections is a primary problem, and other problem is internal MRI coils, where there is a need for improvements in safety. The Miniature FiberOptic Transmission (FOT) System was developed to address these issues. The system consists of a receiver coil with active detuning, a low-noise preamplifier, and a laser diode connected to a photodetector with Fiber-Optic Cabling. The overall noise figure of the system is lower than 1 dB. Total power consumption is 50 mW, and the device is switchable with another FiberOptic line, which can also control active detuning. A prototype device was tested in a GE 1.5 Tesla MRI scanner, and several images were acquired with a signal to noise ratio similar to coaxial Cabling. We believe that this design will reduce the Cabling problems of arrays and enable placement of internal coils into body cavities with no safety hazard to the patient, such as electrical shock or burns. Magn Reson Med 59: 165–173, 2008. © 2007 Wiley-Liss, Inc.

J Connor - One of the best experts on this subject based on the ideXlab platform.

  • gas turbine inlet salt monitoring for filtration and hot section prognostics
    IEEE Aerospace Conference, 2007
    Co-Authors: Daniel E Caguiat, John W Scharschan, J Connor
    Abstract:

    The Naval Surface Warfare Center, Carderock Division (NSWCCD) Gas Turbine Emerging Technologies Code 934 has been working, in conjunction with Vibro-Meter Incorporated, to evaluate and further develop the Vibro-Meter Flame Contaminant Detector (FCD). This device has been used on various commercial gas turbine platforms to quantify the level of sodium entrained in fuel. The FCD consists of a spectrometer device, Fiber Optic Cabling, and a lens assembly, which is mounted in an open combustor port. The combustion flame is continuously monitored for sodium wavelength intensity during gas turbine operation. The FCD was initially of interest to NSWCCD for use in fuel filtration system health monitoring. However, based on known Ship Service Gas Turbine Generator (SSGTG) hot section corrosion issues, it was believed that the FCD would also serve as useful tool for quantifying inlet air salt concentration. Testing was performed at the Philadelphia Land Based Engineering Site in 2003. It was determined that the FCD was able to detect salt concentrations as low as 0.003 parts per million. Initial indications are that airborne salt can be differentiated from fuel entrained salt based on continuous vs. intermittent sodium levels. Continuing efforts are centered on optimizing the existing FCD algorithm to properly differentiate between and quantify inlet air and fuel-entrained salt concentration.

  • inlet air salt concentration detection on u s navy ship service gas turbine generator sets
    ASME Turbo Expo 2004: Power for Land Sea and Air, 2004
    Co-Authors: Daniel E Caguiat, J Connor, Edward Duckless, Richard J Decorso
    Abstract:

    The Naval Surface Warfare Center, Carderock Division (NSWCCD) Gas Turbine Emerging Technologies Code 9334 has been working, in conjunction with Vibro-Meter Incorporated, to evaluate and further develop the Vibro-Meter Flame Contaminant Detector (FCD). This device has been used on various commercial gas turbine platforms to quantify the level of sodium entrained in fuel. The FCD consists of a spectrometer device, Fiber Optic Cabling, and a lens assembly, which is mounted in an open combustor port. The combustion flame is continuously monitored for sodium wavelength intensity during gas turbine operation. The FCD was initially of interest to NSWCCD for use in fuel filtration system health monitoring. However, based on known Ship Service Gas Turbine Generator (SSGTG) hot section corrosion issues, it was believed that the FCD would also serve as useful tool for quantifying inlet air salt concentration. Testing was performed at the Philadelphia Land Based Engineering Site in 2003. It was determined that the FCD was able to detect salt concentrations as low as 0.003 parts per million. Initial indications are that airborne salt can be differentiated from fuel entrained salt based on continuous vs. intermittent sodium levels. Continuing efforts are centered on optimizing the existing FCD algorithm to properly differentiate between and quantify inlet air and fuel-entrained salt concentration.Copyright © 2004 by ASME