Electronic Instrumentation Laboratory
Department of Microelectronics

MSc Rozsa

PhD student
Electronic Instrumentation (EI), Department of Microelectronics

Themes: Smart Ultrasound

Biography

Nuriel N. M. Rozsa was born in Seattle, United States in 1997 and moved to the Netherlands in 2000. He received the B.Sc. degree (cum laude) in electrical engineering and the B.Sc. honours program certificate from Delft University of Technology, Delft, The Netherlands in 2018. For the honours program, he worked on laser cut-through detection of Piezoelectric transducer stacks. For his B.Sc. thesis, he worked on an acoustic conference microphone detection system.

He received the M.Sc. degree in microelectronics from Delft University of Technology, Delft, The Netherlands in 2021. For his M.Sc. thesis, he worked on a chopper class-D amplifier for PSRR improvement over the entire audio band.

He is currently pursuing a Ph.D. degree at the Electronic Instrumentation Laboratory, working within the Ultra-X-Treme research program on high frame-rate 3D ultrasound imaging probes for imaging the Abdominal Aorta.

Ultra-X-treme: Ultrafast Ultrasound Imaging for Extended Diagnosis and Treatment of Vascular Disease

The NWO Perspectief Programme Ultra-X-treme is a 4 Meuro programme in which 5 academic centers and 8 companies collaborate to develop patient-specific ultrasound-based techniques to diagnose and treat vascular disease

  1. Effect of SAR-ADC Non-Idealities on Medical Ultrasound B-Mode Imaging
    N. Radeljic-Jakic; A. Flikweert; Y. Hopf; N. Rozsa; M. Pertijs;
    In Proc. IEEE International Ultrasonics Symposium (IUS),
    2023. abstract, accepted.

  2. A Tiled Ultrasound Matrix Transducer for Volumetric Imaging of the Carotid Artery
    dos Santos, Djalma Simões; Fool, Fabian; Mozaffarzadeh, Moein; Shabanimotlagh, Maysam; Noothout, Emile; Kim, Taehoon; Rozsa, Nuriel; Vos, Hendrik J.; Bosch, Johan G.; Pertijs, Michiel A. P.; Verweij, Martin D.; de Jong, Nico;
    Sensors,
    Volume 22, Issue 24, pp. 1--23, 2022. DOI: 10.3390/s22249799
    Abstract: ... High frame rate three-dimensional (3D) ultrasound imaging would offer excellent possibilities for the accurate assessment of carotid artery diseases. This calls for a matrix transducer with a large aperture and a vast number of elements. Such a matrix transducer should be interfaced with an application-specific integrated circuit (ASIC) for channel reduction. However, the fabrication of such a transducer integrated with one very large ASIC is very challenging and expensive. In this study, we develop a prototype matrix transducer mounted on top of multiple identical ASICs in a tiled configuration. The matrix was designed to have 7680 piezoelectric elements with a pitch of 300 μm × 150 μm integrated with an array of 8 × 1 tiled ASICs. The performance of the prototype is characterized by a series of measurements. The transducer exhibits a uniform behavior with the majority of the elements working within the −6 dB sensitivity range. In transmit, the individual elements show a center frequency of 7.5 MHz, a −6 dB bandwidth of 45%, and a transmit efficiency of 30 Pa/V at 200 mm. In receive, the dynamic range is 81 dB, and the minimum detectable pressure is 60 Pa per element. To demonstrate the imaging capabilities, we acquired 3D images using a commercial wire phantom.

    document

  3. Automated Characterization of Matrix Transducer Arrays using the Verasonics Imaging System
    Djalma Simoes dos Santos; Fabian Fool; Taehoon Kim; Emile Noothout; Nuriel Rozsa; Hendrik J. Vos; Johan G. Bosch; Michiel A. P. Pertijs; Martin D. Verweij; Nico de Jong;
    In Proc. IEEE International Ultrasonics Symposium (IUS),
    2022.

  4. Automated Characterization of Matrix Transducer Arrays using the Verasonics Imaging System
    Djalma Simoes dos Santos; Fabian Fool; Taehoon Kim; Emile Noothout; Nuriel Rozsa; Hendrik J. Vos; Johan G. Bosch; Michiel A. P. Pertijs; Martin D. Verweij; Nico de Jong;
    In Proc. IEEE International Ultrasonics Symposium (IUS),
    2022.

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Last updated: 26 Aug 2022

Nuriel Rozsa