Proceedings ArticleDOI
A forward-viewing ring-annular array for intravascular ultrasound imaging
Yao Wang,Douglas N. Stephens,Matthew O'Donnell +2 more
- Vol. 2, pp 1573-1576
TLDR
In this article, a ring-annular array with 64 transceivers was constructed to achieve side-lobes under -40dB for on-axis situations and under -30dB for steering to the edge of a 60/spl deg/ cone.Abstract:
We have investigated IVUS array design and image synthesis methods allowing simultaneous sideward imaging at 20MHz and forward imaging at 10MHz. This design is appropriate for over-the-wire delivery but limits the forward-viewing aperture to a ring-annular array. In particular, a 1200/spl mu/m diameter ring-annular array with 64 elements has been constructed. The measured forward-viewing radiation pattern of an individual element indicates an acceptance angle range of over 90/spl deg/. Our beam synthesis involves a total of 210 transceiver firings in a synthetic imaging mode for a given 3D frame. Broadband simulations demonstrated this design can achieve side-lobes under -40dB for on-axis situations and under -30dB for steering to the edge of a 60/spl deg/ cone.read more
Citations
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Journal ArticleDOI
Optimizing the beam pattern of a forward-viewing ring-annular ultrasound array for intravascular imaging
TL;DR: A practical array geometry and signal processing architecture for a forward-viewing IVUS system that can achieve side-lobes under -40 dB for on-axis situations and under -30 dB for steering to the edge of a 60/spl deg/ cone.
Journal ArticleDOI
Coded EXcitation with spectrum inversion (CEXSI) for ultrasound array imaging
TL;DR: A formulation of the scheme, according to which CEXSI can be extended to improve SNR in sparse array imaging in general, and its potential to achieve excellent decoding with very low (<80 dB) side-lobes is demonstrated.
Proceedings ArticleDOI
Capacitive micromachined ultrasonic transducers for forward looking intravascular imaging arrays
TL;DR: In this paper, the authors used finite element analysis (FEA) to calculate the electromechanical coupling coefficient, k/sup 2/, using the fundamental, energy based definition, and then improved the cMUT equivalent circuit model by incorporating the FEA results in the circuit elements.
Proceedings ArticleDOI
Fabrication and characterization of cMUTs for forward looking intravascular ultrasound imaging
J.G. Knight,F.L. Degertekin +1 more
TL;DR: A ring annular capacitive micromachined ultrasonic transducer (cMUT) arrays for forward looking IVUS operation in the 10 to 20MHz range with a maximum process temperature of 250/spl deg/C was fabricated in this article.
Journal ArticleDOI
Real-time 3-D ultrasound guidance of interventional devices
TL;DR: A new generation of miniature ring-array transducers integrated into the catheter deployment kits of interventional devices to enable real-time 3-D ultrasound scanning for improved guidance of minimally invasive procedures is developed.
References
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Journal ArticleDOI
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Paul G. Yock,Peter J. Fitzgerald,David T. Linker,David T. Linker,Bjoern A.J. Angelsen,Bjoern A.J. Angelsen +5 more
TL;DR: This review summarizes the potential applications of ultrasound imaging in the guidance of balloon angioplasty, atherectomy, laser ablation and stenting, and shows promise for enhancing the safety and efficacy of the catheter devices.
Patent
Method and apparatus for ultrasonic imaging
TL;DR: In this paper, the transducer element (412) is designed for k33 half-resonance and can operate and provide for both forward-looking (514) and side looking (512) elevation apertures.
Journal ArticleDOI
Synthetic phased arrays for intraluminal imaging of coronary arteries
Matthew O'Donnell,Michael J. Eberle,Douglas N. Stephens,J.L. Litzza,K. San Vicente,B.M. Shapo +5 more
TL;DR: In this article, a 64-element, high efficiency, ceramic piezoelectric array transducer operating at 20 MHz has been constructed for ultrasonic intraluminal imaging.