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River Sonic Solutions

Expert Witnessing and Technical Consulting in imaging, signal processing and electronics

Experience

Resumé

Resumé

Papers

Invited Papers

cMUTs and Electronics for 2D and 3D Imaging: Monolithic Integration, In-Handle Chip Sets and System Implications

Conformable transducers for large-volume, operator-independent imaging

Neural networks for image analysis

Transcranial

A Double-Blind Pilot Study of Transcranial Ultrasound (TUS) as a Five-Day Intervention: TUS Mitigates Worry among Depressed Participants

Transcranial Focused Ultrasound to the Right Prefrontal Cortex Improves Mood and Alters Functional Connectivity in Humans

Piezo-MEMS

Characterization of a 3D-MEMS Piezoelectric Transducer for Portable Imaging Systems

Beamforming

Sigma-Delta Dynamic Receive Beamforming

Two Approaches to Electronically Scanned 3D Imaging Using cMUTs

Elevation Beam Profile Control with Bias Polarity Patterns Applied to Microfabricated Ultrasound Transducers

Windowing of Wideband Ultrasound Transducers

Elevation Performance of 1.25D and 1.5D Transducer Arrays

Beam profiles and images from two-dimensional arrays

Integration of transducers and front-end electronics

A Matrix Transducer Design with Improved Image Quality and Acquisition Rate

Microfabricated Ultrasonic Transducers Monolithically Integrated with High Voltage Electronics

Miscellaneous

A 1.5D Transducer for Medical Ultrasound

Comprehensive Imager Simulation for Improved Acoustic Power Control

In-Vivo Fetal Ultrasound Exposimetry

A Quantitative Acoustic Microscope with Multiple Detection Modes

Wideband Acoustic Microscopy of Tissue

The elastic microstructure of various tissues

Adaptive filtering for reduction of speckle in ultrasonic pulse-echo images

Frequency dependence of tissue attenuation measured by acoustic microscopy

Application of neural networks to ultrasound tomography

Patents and Published Applications

10,067,229 Receive-side beam forming for an ultrasonic image sensor

Application US2018185011 Ultrasonic device and operation method therefor

10,022,751 Piezoelectric transducer device for configuring a sequence of operational modes

9,274,088 Redistribution layer in an ultrasound diagnostic imaging transducer

8,795,182 Switch for aperture control in medical diagnostic ultrasound imaging

8,647,279 Volume mechanical transducer for medical diagnostic ultrasound

8,641,628 Aperture synthesis using cMUTs

8,465,431 Multi-dimensional CMUT array with integrated beamformation

8,277,380 Piezoelectric and CMUT layered ultrasound transducer array

7,963,919 Ultrasound imaging transducer array for synthetic aperture

7,824,338 Apparatus for two-dimensional transducers used in three-dimensional ultrasonic imaging

7,780,597 Method and apparatus for improving the performance of capacitive acoustic transducers using bias polarity control and multiple firings

7,719,166 Apparatus for two-dimensional transducer used in three-dimensional ultrasonic imaging

7,679,263 Apparatus for two-dimensional transducers used in three-dimensional ultrasonic imaging

7,670,290 Electric circuit for tuning a capacitive electrostatic transducer

7,618,373 Microfabricated ultrasonic transducer array for 3-D imaging and method of operating the same

7,508,113 Apparatus for two-dimensional transducers used in three-dimensional ultrasonic imaging

7,087,023 Microfabricated ultrasonic transducers with bias polarity beam profile control and method of operating the same

7,006,955 System and method for statistical design of ultrasound probe and imaging system

6,931,270 Method and system for conducting medical imaging transactions

6,245,016 Ultrasound imaging system having post-beamformer signal processing using deconvolution algorithm

5,817,023 Ultrasound imaging system with dynamic window function generator

5,769,790 Focused ultrasound surgery system guided by ultrasound imaging

5,445,156 Method for adaptively filtering doppler signals using a complex time domain filter

5,349,524 Color flow imaging system utilizing a time domain adaptive wall filter

5,345,939 Ultrasound imaging system with dynamic window function

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Dr. Chris Daft

Dr Chris Daft

Dr. Chris Daft is an award winning, Oxford Educated scientist who provides technical consulting and expert witnessing services.
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Company Information

2443 Fillmore St. #380-4039
San Francisco, CA 94115
USA

Technical Consulting

(925) 452-6803

info@riversonicsolutions.com

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(415) 800-3734

expert@riversonicsolutions.com

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RiverSonicSolnsRiverSonic Solutions@RiverSonicSolns·
April 14, 2021

Are the factors for admissability of #expertwitness testimony about to change? Here's a quick review of Daubert, Frye, Kumho Tire and FRE 702 - with the conclusion that there will soon be an amendment: https://lnkd.in/dYsWcbK

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RiverSonicSolnsRiverSonic Solutions@RiverSonicSolns·
April 7, 2021

Fermilab measurements of the muon's magnetic moment suggest that the Standard Model of #particlephysics may be incomplete https://lnkd.in/g8DBAkq

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RiverSonicSolnsRiverSonic Solutions@RiverSonicSolns·
March 21, 2021

Lemley and Zyontz of Stanford Law School find that invalidating #patents via section 101, after the Supreme Court's "Alice" decision, does not affect non-practicing entities as much as individual inventors and inventor-started comp…https://lnkd.in/gNngw9X https://lnkd.in/gNqBD5G

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RiverSonicSolnsRiverSonic Solutions@RiverSonicSolns·
March 17, 2021

It's a year since video calls replaced #travel and in-person interaction. Stanford researchers investigate why this change is cognitively difficult https://lnkd.in/gE352QX

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RiverSonicSolnsRiverSonic Solutions@RiverSonicSolns·
March 17, 2021

Researchers at the University of Paris are using localization microscopy to create extraordinary #transcranial #ultrasound images https://lnkd.in/gY3Jct3

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