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  • Elektrik-Elektronik Mühendisliği Bölümü / Department of Electrical-Electronics Engineering
  • MF - Bildiri Koleksiyonu | Elektrik-Elektronik Mühendisliği Bölümü / Department of Electrical-Electronics Engineering
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Phased subarray imaging for low-cost, wideband coherent array imaging

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Date

2003

Author

Johnson, Jeremy A.
Oralkan, Ömer
Ergün, Arif Sanlı
Demirci, Utkan
Karaman, Mustafa
Khuri-Yakub, Butrus Thomas

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Citation

Johnson, J. A., Oralkan, O., Ergun, A. S., Demirci, U., Karaman, M., & Khuri-Yakub, B. T. (2003). Phased subarray imaging for low-cost, wideband coherent array imaging. Paper presented at the , 2 1875-1878 Vol.2. doi:10.1109/ULTSYM.2003.1293280

Abstract

The front-end hardware complexity of conventional full phased array (FPA) imaging is proportional to the number of array elements. Phased subarray (PSA) imaging has been proposed as a method of reducing the hardware complexity-and therefore system cost and size-while achieving near-FPA image quality. A new method is presented for designing the subarray-dependent interpolation filters suitable for wideband PSA imaging. The method was tested experimentally using pulse-echo data of a wire target phantom acquired using a 3.2-cm. 128-element capacitive micromachined ultrasonic transducer (CMUT) array with 85% fractional bandwidth at 3 MHz. A specific PSA configuration using seven 32-element subarrays was compared to FPA imaging, representing a 4-fold reduction in front-end hardware complexity and a 43% decrease in frame rate. For targets near the fixed transmit focal distance, the mean 6-dB lateral resolution was identical to that of FPA, the axial resolution improved by 4%, and the SNR decreased by 5 dB. Measurements were repeated for 10 different PSA configurations with subarray sizes ranging from 4 to 60. The lateral and axial resolutions did not vary significantly with subarray size; both the SNR and contrast-to-noise ratio (CNR) improved with increased subarray size.

Source

Proceedings of the IEEE Ultrasonics Symposium

Volume

2

URI

https://hdl.handle.net/11729/2051
https://dx.doi.org/10.1109/ULTSYM.2003.1293280

Collections

  • MF - Bildiri Koleksiyonu | Elektrik-Elektronik Mühendisliği Bölümü / Department of Electrical-Electronics Engineering [211]
  • Scopus İndeksli Bildiri Koleksiyonu [409]

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