TY - JOUR
T1 - Volumetric real-time imaging using a CMUT ring array
AU - Choe, Jung Woo
AU - Oralkan, Ömer
AU - Nikoozadeh, Amin
AU - Gencel, Mustafa
AU - Stephens, Douglas N.
AU - O'Donnell, Matthew
AU - Sahn, David J.
AU - Khuri-Yakub, Butrus T.
N1 - Funding Information:
Manuscript received March 5, 2012; accepted april 2, 2012. This work was supported by the national Institutes of Health under grants Hl67647 and ca134720. J. W. choe was supported by the Kwanjeong Educational Foundation (seoul, Korea). J. W. choe, a. nikoozadeh, and B. T. Khuri-yakub are with and Ö. oralkan and M. Gencel were with the Edward l. Ginzton laboratory, stanford University, stanford, ca (e-mail: choejw@stanford.edu). Ö. oralkan is with the department of Electrical and computer Engineering, north carolina state University, raleigh, nc. M. Gencel is with apple Inc., cupertino, ca. d. n. stephens is with the department of Biomedical Engineering, University of california, davis, ca. M. o’donnell is with the department of Bioengineering, University of Washington, seattle, Wa. d. J. sahn is with the division of Pediatric cardiology, oregon Health and science University, Portland, or. doI http://dx.doi.org/10.1109/TUFFc.2012.2310
PY - 2012
Y1 - 2012
N2 - A ring array provides a very suitable geometry for forward-looking volumetric intracardiac and intravascular ultrasound imaging. We fabricated an annular 64-element capacitive micromachined ultrasonic transducer (CMUT) array featuring a 10-MHz operating frequency and a 1.27-mm outer radius. A custom software suite was developed to run on a PCbased imaging system for real-time imaging using this device. This paper presents simulated and experimental imaging results for the described CMUT ring array. Three different imaging methods-flash, classic phased array (CPA), and synthetic phased array (SPA)-were used in the study. For SPA imaging, two techniques to improve the image quality-Hadamard coding and aperture weighting-were also applied. The results show that SPA with Hadamard coding and aperture weighting is a good option for ring-array imaging. Compared with CPA, it achieves better image resolution and comparable signal-tonoise ratio at a much faster image acquisition rate. Using this method, a fast frame rate of up to 463 volumes per second is achievable if limited only by the ultrasound time of flight; with the described system we reconstructed three cross-sectional images in real-time at 10 frames per second, which was limited by the computation time in synthetic beamforming.
AB - A ring array provides a very suitable geometry for forward-looking volumetric intracardiac and intravascular ultrasound imaging. We fabricated an annular 64-element capacitive micromachined ultrasonic transducer (CMUT) array featuring a 10-MHz operating frequency and a 1.27-mm outer radius. A custom software suite was developed to run on a PCbased imaging system for real-time imaging using this device. This paper presents simulated and experimental imaging results for the described CMUT ring array. Three different imaging methods-flash, classic phased array (CPA), and synthetic phased array (SPA)-were used in the study. For SPA imaging, two techniques to improve the image quality-Hadamard coding and aperture weighting-were also applied. The results show that SPA with Hadamard coding and aperture weighting is a good option for ring-array imaging. Compared with CPA, it achieves better image resolution and comparable signal-tonoise ratio at a much faster image acquisition rate. Using this method, a fast frame rate of up to 463 volumes per second is achievable if limited only by the ultrasound time of flight; with the described system we reconstructed three cross-sectional images in real-time at 10 frames per second, which was limited by the computation time in synthetic beamforming.
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U2 - 10.1109/TUFFC.2012.2310
DO - 10.1109/TUFFC.2012.2310
M3 - Article
C2 - 22718870
AN - SCOPUS:84862682964
SN - 0885-3010
VL - 59
SP - 1201
EP - 1211
JO - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
JF - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
IS - 6
M1 - 6217568
ER -