Real-Time Coded Excitation Imaging Using a CMUT-based Side Looking Array for Intravascular Ultrasound
| Autor: | Gijs van Soest, Antonius F.W. van der Steen, Robert Beurskens, Reza Pakdaman Zangabad, Vincent Adrianus Henneken, Frits Mastik, Johan G. Bosch, Johannes Wilhelmus Weekamp |
|---|---|
| Přispěvatelé: | Cardiology |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Acoustics and Ultrasonics Image quality mismatched filtering Transducers 01 natural sciences Imaging phantom Capacitive micromachined ultrasonic transducers Optics 0103 physical sciences Intravascular ultrasound medicine Humans Electrical and Electronic Engineering Center frequency coronary heart disease 010301 acoustics Instrumentation Ultrasonography Interventional Ultrasonography coded excitation (CE) Atherosclerotic plaque medicine.diagnostic_test intravascular ultrasound (IVUS) Phantoms Imaging business.industry Equipment Design capacitive micromachined ultrasound transducer (CMUT) Transducer Signal-to-noise ratio (imaging) Ultrasonic sensor pixel-based beam-forming business |
| Zdroj: | IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 68(6) IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 68(6):9336716, 2048-2058. Institute of Electrical and Electronics Engineers Inc. |
| ISSN: | 0885-3010 |
| Popis: | Intravascular ultrasound (IVUS) is a well-established diagnostic method that provides images of the vessel wall and atherosclerotic plaques. We investigate the potential for phased-array IVUS utilizing coded excitation (CE) for improving the penetration depth and image signal-to-noise ratio (SNR). It is realized on a new experimental broadband capacitive micromachined ultrasound transducer (CMUT) array, operated in collapse mode, with 96 elements placed at the circumference of a catheter tip with a 1.2- ${mm}$ diameter. We characterized the array performance for CE imaging and showed that the −6-dB device bandwidth at a 30-V dc biasing is 25 MHz with a 20-MHz center frequency, with a transmit sensitivity of 37 kPa/V at that frequency. We designed a linear frequency modulation code to improve penetration depth by compensating for high-frequency attenuation while preserving resolution by a mismatched filter reconstruction. We imaged a wire phantom and a human coronary artery plaque. By assessing the image quality of the reconstructed wire phantom image, we achieved 60- and 70- $\mu{\mathrm {m}}$ axial resolutions using the short pulse and coded signal, respectively, and gained 8 dB in SNR for CE. Our developed system shows 20-frames/s, pixel-based beam-formed, real-time IVUS images. |
| Databáze: | OpenAIRE |
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