Phased Array

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The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform

Kirk K. Shung - One of the best experts on this subject based on the ideXlab platform.

  • acoustic trapping with a high frequency linear Phased Array
    Applied Physics Letters, 2012
    Co-Authors: Fan Zheng, Chi Tat Chiu, Ying Li, Kirk K. Shung
    Abstract:

    A high frequency ultrasonic Phased Array is shown to be capable of trapping and translating microparticles precisely and efficiently, made possible due to the fact that the acoustic beam produced by a Phased Array can be both focused and steered. Acoustic manipulation of microparticles by a Phased Array is advantageous over a single element transducer since there is no mechanical movement required for the Array. Experimental results show that 45 μm diameter polystyrene microspheres can be easily and accurately trapped and moved to desired positions by a 64-element 26 MHz Phased Array.

  • laser scanning photoacoustic microscopy with ultrasonic Phased Array transducer
    Biomedical Optics Express, 2012
    Co-Authors: Fan Zheng, Chi Tat Chiu, Bill L Zhou, Kirk K. Shung, Xiangyang Zhang, Hao Zhang, Shuliang Jiao
    Abstract:

    In this paper, we report our latest progress on proving the concept that ultrasonic Phased Array can improve the detection sensitivity and field of view (FOV) in laser-scanning photoacoustic microscopy (LS-PAM). A LS-PAM system with a one-dimensional (1D) ultrasonic Phased Array was built for the experiments. The 1D Phased Array transducer consists of 64 active elements with an overall active dimension of 3.2 mm × 2 mm. The system was tested on imaging phantom and mouse ear in vivo. Experiments showed a 15 dB increase of the signal-to-noise ratio (SNR) when beamforming was employed compared to the images acquired with each single element. The experimental results demonstrated that ultrasonic Phased Array can be a better candidate for LS-PAM in high sensitivity applications like ophthalmic imaging.

  • development of a c scan Phased Array ultrasonic imaging system using a 64 element 35mhz transducer
    Proceedings of SPIE, 2011
    Co-Authors: Fan Zheng, Changhong Hu, Lequan Zhang, K A Snook, Yu Liang, Wesley S Hackenberger, Xuecang Geng, Xiaoning Jiang, Kirk K. Shung
    Abstract:

    Phased Array imaging systems provide the features of electronic beam steering and dynamic depth focusing that cannot be obtained with conventional linear Array systems. This paper presents a system design of a digital ultrasonic imaging system, which is capable of handling a 64-element 35MHz center frequency Phased Array transducer. The system consists of 5 parts: an analog front-end, a data digitizer, a DSP based beamformer, a computer controlled motorized linear stage, and a computer for post image processing and visualization. Using a motorized linear stage, C-scan images, parallel to the surface of scanned objects may be generated. This digital ultrasonic imaging system in combination a 35 MHz Phased Array appears to be a promising tool for NDT applications with high spatial resolution. It may also serve as an excellent research platform for high frequency Phased Array design and testing as well as ultrasonic Array signal algorithm developing using system's raw RF data acquisition function.

Fan Zheng - One of the best experts on this subject based on the ideXlab platform.

  • acoustic trapping with a high frequency linear Phased Array
    Applied Physics Letters, 2012
    Co-Authors: Fan Zheng, Chi Tat Chiu, Ying Li, Kirk K. Shung
    Abstract:

    A high frequency ultrasonic Phased Array is shown to be capable of trapping and translating microparticles precisely and efficiently, made possible due to the fact that the acoustic beam produced by a Phased Array can be both focused and steered. Acoustic manipulation of microparticles by a Phased Array is advantageous over a single element transducer since there is no mechanical movement required for the Array. Experimental results show that 45 μm diameter polystyrene microspheres can be easily and accurately trapped and moved to desired positions by a 64-element 26 MHz Phased Array.

  • laser scanning photoacoustic microscopy with ultrasonic Phased Array transducer
    Biomedical Optics Express, 2012
    Co-Authors: Fan Zheng, Chi Tat Chiu, Bill L Zhou, Kirk K. Shung, Xiangyang Zhang, Hao Zhang, Shuliang Jiao
    Abstract:

    In this paper, we report our latest progress on proving the concept that ultrasonic Phased Array can improve the detection sensitivity and field of view (FOV) in laser-scanning photoacoustic microscopy (LS-PAM). A LS-PAM system with a one-dimensional (1D) ultrasonic Phased Array was built for the experiments. The 1D Phased Array transducer consists of 64 active elements with an overall active dimension of 3.2 mm × 2 mm. The system was tested on imaging phantom and mouse ear in vivo. Experiments showed a 15 dB increase of the signal-to-noise ratio (SNR) when beamforming was employed compared to the images acquired with each single element. The experimental results demonstrated that ultrasonic Phased Array can be a better candidate for LS-PAM in high sensitivity applications like ophthalmic imaging.

  • development of a c scan Phased Array ultrasonic imaging system using a 64 element 35mhz transducer
    Proceedings of SPIE, 2011
    Co-Authors: Fan Zheng, Changhong Hu, Lequan Zhang, K A Snook, Yu Liang, Wesley S Hackenberger, Xuecang Geng, Xiaoning Jiang, Kirk K. Shung
    Abstract:

    Phased Array imaging systems provide the features of electronic beam steering and dynamic depth focusing that cannot be obtained with conventional linear Array systems. This paper presents a system design of a digital ultrasonic imaging system, which is capable of handling a 64-element 35MHz center frequency Phased Array transducer. The system consists of 5 parts: an analog front-end, a data digitizer, a DSP based beamformer, a computer controlled motorized linear stage, and a computer for post image processing and visualization. Using a motorized linear stage, C-scan images, parallel to the surface of scanned objects may be generated. This digital ultrasonic imaging system in combination a 35 MHz Phased Array appears to be a promising tool for NDT applications with high spatial resolution. It may also serve as an excellent research platform for high frequency Phased Array design and testing as well as ultrasonic Array signal algorithm developing using system's raw RF data acquisition function.

Shuliang Jiao - One of the best experts on this subject based on the ideXlab platform.

  • laser scanning photoacoustic microscopy with ultrasonic Phased Array transducer
    Biomedical Optics Express, 2012
    Co-Authors: Fan Zheng, Chi Tat Chiu, Bill L Zhou, Kirk K. Shung, Xiangyang Zhang, Hao Zhang, Shuliang Jiao
    Abstract:

    In this paper, we report our latest progress on proving the concept that ultrasonic Phased Array can improve the detection sensitivity and field of view (FOV) in laser-scanning photoacoustic microscopy (LS-PAM). A LS-PAM system with a one-dimensional (1D) ultrasonic Phased Array was built for the experiments. The 1D Phased Array transducer consists of 64 active elements with an overall active dimension of 3.2 mm × 2 mm. The system was tested on imaging phantom and mouse ear in vivo. Experiments showed a 15 dB increase of the signal-to-noise ratio (SNR) when beamforming was employed compared to the images acquired with each single element. The experimental results demonstrated that ultrasonic Phased Array can be a better candidate for LS-PAM in high sensitivity applications like ophthalmic imaging.

Chi Tat Chiu - One of the best experts on this subject based on the ideXlab platform.

  • acoustic trapping with a high frequency linear Phased Array
    Applied Physics Letters, 2012
    Co-Authors: Fan Zheng, Chi Tat Chiu, Ying Li, Kirk K. Shung
    Abstract:

    A high frequency ultrasonic Phased Array is shown to be capable of trapping and translating microparticles precisely and efficiently, made possible due to the fact that the acoustic beam produced by a Phased Array can be both focused and steered. Acoustic manipulation of microparticles by a Phased Array is advantageous over a single element transducer since there is no mechanical movement required for the Array. Experimental results show that 45 μm diameter polystyrene microspheres can be easily and accurately trapped and moved to desired positions by a 64-element 26 MHz Phased Array.

  • laser scanning photoacoustic microscopy with ultrasonic Phased Array transducer
    Biomedical Optics Express, 2012
    Co-Authors: Fan Zheng, Chi Tat Chiu, Bill L Zhou, Kirk K. Shung, Xiangyang Zhang, Hao Zhang, Shuliang Jiao
    Abstract:

    In this paper, we report our latest progress on proving the concept that ultrasonic Phased Array can improve the detection sensitivity and field of view (FOV) in laser-scanning photoacoustic microscopy (LS-PAM). A LS-PAM system with a one-dimensional (1D) ultrasonic Phased Array was built for the experiments. The 1D Phased Array transducer consists of 64 active elements with an overall active dimension of 3.2 mm × 2 mm. The system was tested on imaging phantom and mouse ear in vivo. Experiments showed a 15 dB increase of the signal-to-noise ratio (SNR) when beamforming was employed compared to the images acquired with each single element. The experimental results demonstrated that ultrasonic Phased Array can be a better candidate for LS-PAM in high sensitivity applications like ophthalmic imaging.

Helen Lai Wa Chan - One of the best experts on this subject based on the ideXlab platform.

  • development of a 20 mhz wide bandwidth pmn pt single crystal Phased Array ultrasound transducer
    Ultrasonics, 2017
    Co-Authors: Chiman Wong, Yan Chen, Helen Lai Wa Chan
    Abstract:

    Abstract In this study, a 20-MHz 64-element Phased-Array ultrasound transducer with a one-wavelength pitch is developed using a PMN-30%PT single crystal and double-matching layer scheme. High piezoelectric (d33 > 1000 pC/N) and electromechanical coupling (k33 > 0.8) properties of the single crystal with an optimized fabrication process involving the photolithography technique have been demonstrated to be suitable for wide-bandwidth (⩾70%) and high-sensitivity (insertion loss ⩽30 dB) Phased-Array transducer application. A −6 dB bandwidth of 91% and an insertion loss of 29 dB for the 20-MHz 64-element Phased-Array transducer were achieved. This result shows that the bandwidth is improved comparing with the investigated high-frequency (⩾20 MHz) ultrasound transducers using piezoelectric ceramic and single crystal materials. It shows that this Phased-Array transducer has potential to improve the resolution of biomedical imaging, theoretically. Based on the hypothesis of resolution improvement, this Phased-Array transducer is capable for small animal (i.e. mouse and zebrafish) studies.