An Analog beamformer for integrated high-frequency medical ultrasound imaging
Yükleniyor...
Dosyalar
Tarih
2011
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
IEEE
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
We designed and fabricated a dynamic receive beamforming integrated circuit (IC) in 0.35-mu m CMOS technology. This beamformer is suitable for integration with an ultrasound annular array for high-frequency (30-50 MHz) intravascular ultrasound (IVUS) imaging. The beamformer IC is capable of buffering, delaying and preamplification for 8 receive channels. We explored an analog delay cell based on a currentmode first-order all-pass filter, which is used as the basic building block to form an analog dynamic delay line. We also explored a bandwidth enhancement method on the delay cell that improved the overall bandwidth of the delay line by a factor of 6. Each delay cell consumes 2.1 mW of power and is capable of generating a tunable delay between 1.75 ns to 2.5 ns, enabling dynamic receive beamforming over a focal range from 1.4 mm to 2 mm. We successfully integrated the fabricated beamformer IC with an 8-element annular array. Our experimental test results demonstrated the desired buffering, preamplification and delaying capabilities of the beamformer.
Açıklama
Anahtar Kelimeler
Matrix transducer, Arrays, Delay, Bandwidth, Ultrasonic imaging, Mirrors, Integrated circuits, Delay lines, All-pass filters, CMOS analogue integrated circuits, High-frequency effects, Medical image processing, Analog beamformer, Integrated high-frequency medical ultrasound imaging, Dynamic receive beamforming integrated circuit, CMOS technology, Ultrasound annular array, Buffering, Preamplification, Receive channels, Analog delay cell, Current-mode first-order all-pass filter, Analog dynamic delay line, 8-element annular array, Frequency 30 MHz to 59 MHz, Size 0.35 mum, Power 2.1 mW, Time 1.75 ns to 2.25 ns
Kaynak
WoS Q Değeri
N/A
Scopus Q Değeri
N/A
Cilt
Sayı
Künye
Gürün, G., Zahorian, J., Tekeş, C., Karaman, M., Hasler, P. E. & Değertekin, F. L. (2011). An analog beamformer for integrated high-frequency medical ultrasound imaging. Paper presented at the 2011 IEEE Biomedical Circuits and Systems Conference (BioCAS), 65-68. doi:10.1109/BioCAS.2011.6107728
