Search Results - "van Neer, Paul L."
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Algorithm to Correct Measurement Offsets Introduced by Inactive Elements of Transducer Arrays in Ultrasonic Flow Metering
Published in Sensors (Basel, Switzerland) (30-11-2022)“…Ultrasonic flow meters (UFMs) based on transducer arrays offer several advantages. With electronic beam steering, it is possible to tune the steering angle of…”
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Super-harmonic imaging: development of an interleaved phased-array transducer
Published in IEEE transactions on ultrasonics, ferroelectrics, and frequency control (01-02-2010)“…For several years, the standard in ultrasound imaging has been second-harmonic imaging. A new imaging technique dubbed "super-harmonic imaging" (SHI) was…”
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Flexible large-area ultrasound arrays for medical applications made using embossed polymer structures
Published in Nature communications (30-03-2024)“…With the huge progress in micro-electronics and artificial intelligence, the ultrasound probe has become the bottleneck in further adoption of ultrasound…”
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Measurement of Pipe and Liquid Parameters Using the Beam Steering Capabilities of Array-Based Clamp-On Ultrasonic Flow Meters
Published in Sensors (Basel, Switzerland) (06-07-2022)“…Clamp-on ultrasonic flow meters (UFMs) are installed on the outside of the pipe wall. Typically, they consist of two single-element transducers mounted on…”
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Optimization of a phased-array transducer for multiple harmonic imaging in medical applications: frequency and topology
Published in IEEE transactions on ultrasonics, ferroelectrics, and frequency control (01-03-2011)“…Second-harmonic imaging is currently one of the standards in commercial echographic systems for diagnosis, because of its high spatial resolution and low…”
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Measurement of Pipe and Fluid Properties With a Matrix Array-Based Ultrasonic Clamp-On Flow Meter
Published in IEEE transactions on ultrasonics, ferroelectrics, and frequency control (01-01-2022)“…Current ultrasonic clamp-on flow meters consist of a pair of single-element transducers that are carefully positioned before use. This positioning process…”
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Design and Proof-of-Concept of a Matrix Transducer Array for Clamp-On Ultrasonic Flow Measurements
Published in IEEE transactions on ultrasonics, ferroelectrics, and frequency control (01-08-2022)“…Common clamp-on ultrasonic flow meters consist of two single-element transducers placed on the pipe wall. Flow speed is measured noninvasively, i.e., without…”
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Comparison of fundamental, second harmonic, and superharmonic imaging: A simulation study
Published in The Journal of the Acoustical Society of America (01-11-2011)“…In medical ultrasound, fundamental imaging (FI) uses the reflected echoes from the same spectral band as that of the emitted pulse. The transmission frequency…”
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Reflector-based phase calibration of ultrasound transducers
Published in Ultrasonics (2011)“…Recently, the measurement of phase transfer functions (PTFs) of piezoelectric transducers has received more attention. These PTFs are useful for e.g. coding…”
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10
Acoustic Sizing of an Ultrasound Contrast Agent
Published in Ultrasound in medicine & biology (01-10-2010)“…Abstract Because the properties of ultrasound contrast agent populations after administration to patients are largely unknown, methods able to study them…”
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Mode Vibrations of a Matrix Transducer for Three-Dimensional Second Harmonic Transesophageal Echocardiography
Published in Ultrasound in medicine & biology (01-10-2012)“…Abstract Transesophageal echocardiography (TEE) uses the esophagus as an imaging window to the heart. This enables cardiac imaging without interference from…”
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12
Dual-pulse frequency compounded superharmonic imaging
Published in IEEE transactions on ultrasonics, ferroelectrics, and frequency control (01-11-2011)“…Tissue second-harmonic imaging is currently the default mode in commercial diagnostic ultrasound systems. A new modality, superharmonic imaging (SHI), combines…”
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13
Transfer functions of US transducers for harmonic imaging and bubble responses
Published in Ultrasonics (01-11-2007)“…Current medical diagnostic echo systems are mostly using harmonic imaging. This means that a fundamental frequency (e.g., 2 MHz) is transmitted and the…”
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14
Mapping buried nanostructures using subsurface ultrasonic resonance force microscopy
Published in Ultramicroscopy (01-01-2018)“…•Subsurface ultrasonic resonance force microscopy (SSURFM) is developed.•SSURFM can be used to obtain images of nanoscale subsurface features.•Subsurface…”
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Exploiting nonlinear wave propagation to improve the precision of ultrasonic flow meters
Published in Ultrasonics (01-09-2021)“…Acoustic wave propagation in ultrasonic flow measurements is typically assumed to be linear and reciprocal. However, if the transmitting transducer generates a…”
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Suppression of Lamb wave excitation via aperture control of a transducer array for ultrasonic clamp-on flow metering
Published in The Journal of the Acoustical Society of America (01-04-2020)“…During ultrasonic clamp-on flow metering, Lamb waves propagating in the pipe wall may limit the measurement accuracy by introducing absolute errors in the flow…”
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F- k Domain Imaging for Synthetic Aperture Sequential Beamforming
Published in IEEE transactions on ultrasonics, ferroelectrics, and frequency control (01-01-2016)“…Spatial resolution in medical ultrasound images is a key component in image quality and an important factor for clinical diagnosis. In early systems, the…”
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High‐Frequency Surface Dynamics at an Electroactive Polymer Producing Underwater Soundwaves
Published in Advanced functional materials (01-05-2022)“…Coatings with dynamic surface structures are appealing to many applications like haptics and soft robotics. Restrictively, the speed of the surface dynamics in…”
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Second harmonic inversion for ultrasound contrast harmonic imaging
Published in Physics in medicine & biology (07-06-2011)“…Ultrasound contrast agents (UCAs) are small micro-bubbles that behave nonlinearly when exposed to an ultrasound wave. This nonlinear behavior can be observed…”
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An Algorithm to Minimize the Zero-Flow Error in Transit-Time Ultrasonic Flowmeters
Published in IEEE transactions on instrumentation and measurement (2021)“…Transit-time ultrasonic flowmeters are widely used in industry to measure fluid flow. In practice, ultrasonic flowmeters either show a zero-flow error or…”
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