Phased subarray imaging for low-cost, wideband coherent array imaging
Yükleniyor...
Dosyalar
Tarih
2003
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
IEEE
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
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.
Açıklama
Anahtar Kelimeler
3 MHz, 3.2 cm, Antenna phased arrays, Axial resolution, Bandwidth, Beamforming, Capacitive micromachines ultrasonic transducer, Contrast-to-noise ratio, Cost effectiveness, Costs, Filters, Flow imaging, FPA imaging, Front-end hardware complexity, Full phased array, Full phased array (FPA), Hardware, Image quality, Image resolution, Imaging, Imaging systems, Interpolation, Interpolation filters, Lateral resolution, Low cost array imaging, Nyquist diagrams, Phantoms, Phased arrays, Phased subarray imaging, Pulse-echo data, Signal to noise ratio, SNR, Subarray-dependent interpolation filters, System cost, System size, Testing, Transducers, Transmit focal distance, Ultrasonic imaging, Ultrasonic transducer arrays, Ultrasonic transducers, Wideband, Wideband coherent array imaging, Wire target phantom
Kaynak
Proceedings of the IEEE Ultrasonics Symposium
WoS Q Değeri
N/A
Scopus Q Değeri
N/A
Cilt
2
Sayı
Künye
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 Proceedings of the IEEE Ultrasonics Symposium, 2, 1875-1878. doi:10.1109/ULTSYM.2003.1293280
