A Reduced-Wire ICE Catheter ASIC With Tx Beamforming and Rx Time-Division Multiplexing

This paper presents a single chip reduced-wire active catheter application-specific integrated circuit (ASIC), equipped with programmable transmit (Tx) beamforming and receive (Rx) time-division multiplexing (TDM). The proposed front-end ASIC is designed for driving a 64-channel one-dimensional tran...

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Bibliographic Details
Published in:IEEE transactions on biomedical circuits and systems 2018-12, Vol.12 (6), p.1246-1255
Main Authors: Jung, Gwangrok, Tekes, Coskun, Rashid, M. Wasequr, Carpenter, Thomas M., Cowell, David, Freear, Steven, Degertekin, F. Levent, Ghovanloo, Maysam
Format: Article
Language:English
Subjects:
Acidity
Application specific integrated circuits
Array signal processing
Beamforming
Biomedical acoustics
Capacitive micromachined ultrasound transducers (CMUT)
Catheters
CMOS
Data processing
Demultiplexing
Echocardiography
Electric potential
High voltage
High voltages
Integrated circuits
intracardiac echocardiography (ICE)
Magnetic resonance imaging
Medical instruments
medical ultrasound imaging
Micromachining
Power consumption
Pulse generators
Sodium channels
Time division multiplexing
Transducers
Ultrasonic imaging
Ultrasound
Voltage
Wire
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Summary:This paper presents a single chip reduced-wire active catheter application-specific integrated circuit (ASIC), equipped with programmable transmit (Tx) beamforming and receive (Rx) time-division multiplexing (TDM). The proposed front-end ASIC is designed for driving a 64-channel one-dimensional transducer array in intracardiac echocardiography (ICE) ultrasound catheters. The ASIC is implemented in 60 V 0.18-μm HV-BCD technology, integrating Tx beamformers with high voltage pulsers and Rx front end in the same chip, which occupies 2.6 × 11 mm 2 that can fit in the catheter size of 9 F (64 to only 22 by integrating Tx beamformer that is programmable using a single low-voltage differential signaling data line. In Rx mode, the system uses 8:1 TDM with direct digital demultiplexing providing raw channel data that enables dynamic Rx beamforming using individual array elements. This system has been successfully used for B-mode imaging on standard ultrasound phantom with 401 mW of average power consumption. The ASIC has a compact element pitch-matched layout, which is also compatible with capacitive micromachined ultrasound transducer on CMOS application. This system addresses cable number and dimensional restrictions in catheters to enable ICE imaging under magnetic resonance imaging by reducing radio frequency induced heating.
ISSN:1932-4545
1940-9990
DOI:10.1109/TBCAS.2018.2881909