A 1-D CMUT transducer with front-end ASIC in a 9 French catheter for Intracardiac Echocardiography: Acoustic and Imaging evaluation

Tony Mateo, Nicolas Sénégond, Cyril Meynier, Dominique Gross, Philippe Vince, Mingliang Tan, Eunchul Kang, Michiel Pertijs

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

In this work, we report the acoustical characterization of a 9 French (Fr) CMUT-based 1D catheter tip (2.5×12.8 mm 2 - 64 elements - 7.5 MHz) embedding a 64 channels analog transceiver ASIC (180 nm HV BCD technology) dedicated to Intra-cardiac Echocardiography. To this end, a Through-Silicon-Via process has been integrated in the CMUT process flow to ensure suitable vertical integration level needed to accommodate with the catheter's form factor. Good overall functioning of essential ASIC functionalities with the CMUT, i.e. transmit, beamforming, and receive, is first reported, starting from elementary characterization up to imaging. Additionally, a comparison with a custom discrete solution based on Commercial Off-The-Shelf components (COTS) to provide suitable CMUT preamplification in receive is performed. Using the same CMUT chip either with the ASIC, either with the COTS, allowed to quantify the benefit brought by the ASIC compared to a more straightforward but less integrated solution. Main results highlight that CMUT-on-ASIC allows to recover a much wider bandwidth (BW), increasing by 3 MHz the -6dB upper limit, and therefore getting closer the theoretical BW of the CMUT itself. Moreover, lower element crosstalk is measured on CMUT-on-ASIC device, showing that the ASIC decreases the electrical coupling compared to the COTS. Finally, noise equivalent pressure measurements in comparison with simulations in realistic ICE configuration promise much higher receive sensitivity with the ASIC solution, hence, confirming its great interest for the CMUT technology compared to less integrated solution, especially for catheter application.
Original languageEnglish
Title of host publication2020 IEEE International Ultrasonics Symposium (IUS)
Subtitle of host publicationProceedings
Place of PublicationPiscataway
PublisherIEEE
Pages1-8
Number of pages8
ISBN (Electronic)978-1-7281-5448-0
ISBN (Print)978-1-7281-5449-7
DOIs
Publication statusPublished - 2020
EventIEEE International Ultrasonics Symposium 2020 - Las Vegas, United States
Duration: 6 Sep 202011 Sep 2020

Conference

ConferenceIEEE International Ultrasonics Symposium 2020
Abbreviated titleIUS 2020
CountryUnited States
CityLas Vegas
Period6/09/2011/09/20
OtherVirtual/online event due to COVID-19

Keywords

  • CMUT
  • ASIC
  • ICE
  • ultrasound catheter

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