| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Jensen, Jørgen Arendt
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (26/26 displayed)
- 2023Contrast-enhanced ultrasound imaging using capacitive micromachined ultrasonic transducerscitations
- 2022A Hand-Held 190+190 Row–Column Addressed CMUT Probe for Volumetric Imagingcitations
- 20213D printed calibration micro-phantoms for super-resolution ultrasound imaging validationcitations
- 2020Real Time Synthetic Aperture and Plane Wave Ultrasound Imaging with the Xilinx VERSAL™ SIMD-VLIW Architecturecitations
- 2019Imaging Performance for Two Row–Column Arrayscitations
- 2019188+188 Row–Column Addressed CMUT Transducer for Super Resolution Imagingcitations
- 2019CMUT Electrode Resistance Design: Modelling and Experimental Verification by a Row-Column Arraycitations
- 20193D Printed Calibration Micro-phantoms for Validation of Super-Resolution Ultrasound Imagingcitations
- 2018Probe development of CMUT and PZT row-column-addressed 2-D arrayscitations
- 2018Increasing the field-of-view of row–column-addressed ultrasound transducers: implementation of a diverging compound lenscitations
- 2018Design of a novel zig-zag 192+192 Row Column Addressed Array Transducer: A simulation study.citations
- 2017Transmitting Performance Evaluation of ASICs for CMUT-Based Portable Ultrasound Scanners
- 2017Real-time Implementation of Synthetic Aperture Vector Flow Imaging on a Consumer-level Tabletcitations
- 2017Output Pressure and Pulse-Echo Characteristics of CMUTs as Function of Plate Dimensionscitations
- 20163-D Vector Flow Using a Row-Column Addressed CMUT Arraycitations
- 20153-D Imaging Using Row–Column-Addressed Arrays With Integrated Apodization. Part I: Apodization Design and Line Element Beamformingcitations
- 20153-D Imaging Using Row–Column-Addressed Arrays With Integrated Apodization. Part I: Apodization Design and Line Element Beamformingcitations
- 20153-D Imaging Using Row-Column-Addressed Arrays With Integrated Apodization:Part II: Transducer Fabrication and Experimental Resultscitations
- 20153-D Imaging Using Row-Column-Addressed Arrays With Integrated Apodizationcitations
- 2012Multilayer piezoelectric transducer models combined with Field IIcitations
- 2011Performance Evaluation of a Synthetic Aperture Real-Time Ultrasound System
- 2010Simulation of High Quality Ultrasound Imaging
- 2009Parameter sensitivity study of a Field II multilayer transducer model on a convex transducercitations
- 2007Medical ultrasound imagingcitations
- 2004Preliminary In-Vivo Evaluation of Convex Array Synthetic Aperture Imagingcitations
- 2003Delay generation methods with reduced memory requirementscitations
Places of action
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article
Increasing the field-of-view of row–column-addressed ultrasound transducers: implementation of a diverging compound lens
Abstract
The purpose of this work is to investigate compound lenses for row-column-addressed (RCA) ultrasound transducers for increasing the field-of-view (FOV) to a curvilinear volume region, while retaining a flat sole to avoid trapping air between the transducer sole and the patient, which would otherwise lead to unwanted reflections. The primary motivation behind this research is to develop a RCA ultrasound transducer for abdominal or cardiac imaging, where a curvilinear volume region is a necessity. RCA transducers provide 3-D ultrasound imaging with fewer channels than fully-addressed 2-D arrays (2N instead of N<sub>2</sub>), but they have inherently limited FOV. By increasing the RCA FOV, these transducers can be used for the same applications as fully-addressed transducers while retaining the same price range as conventional 2-D imaging due to the lower channel count. Analytical and finite element method (FEM) models were employed to evaluate design options. Composite materials were developed by loading polymers with inorganic powders to satisfy the corresponding speed of sound and specific acoustical impedance requirements. A Bi<sub>2</sub>O<sub>3</sub> powder with a density of 8.9 g/cm<sub>3</sub> was used to decrease the speed of sound of a room temperature vulcanizing (RTV) silicone, RTV615, from 1.03 mm=μs to 0.792 mm=μs. Using micro-balloons in RTV615 and a urethane, Hapflex 541, their speeds of sound were increased from 1.03 mm=μs to 1.50 mm=μs and from 1.52 mm=μs to 1.93 mm=μs, respectively. A diverging add-on lens was fabricated of a Bi<sub>2</sub>O<sub>3</sub> loaded RTV615 and an unloaded Hapflex 541. The lens was tested using a RCA probe, and a FOV of 32.2° was measured from water tank tests, while the FEM model yielded 33.4°. A wire phantom with 0.15 mm diameter wires was imaged at 3 MHz down to a depth of 14 cm using a synthetic aperture imaging sequence with single element transmissions. The beamformed image showed that wires outside the array footprint were visible, demonstrating the increased FOV.