An ultrasound beamformer using oversampling

Oversampled analog to digital converters (delta-sigma A/Ds) have been proposed to radically reduce the size, cost and power consumption of digital ultrasound beamformers. Simply replacing conventional A/Ds with single bit oversampled versions, however, produces significant image artifacts for a dyna...

Full description

Saved in:
Bibliographic Details
Main Authors: Freeman, S.R., Quick, M.K., Morin, M.A., Anderson, R.C., Desilets, C.S., Linnenbrink, T.E., O'Donnell, M.
Format: Conference Proceeding
Language:English
Subjects:
Baseband
Circuits
Delay
Digital filters
Digital-to-frequency converters
Doppler measurements
Focusing
Shift registers
Signal synthesis
Ultrasonic imaging
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Oversampled analog to digital converters (delta-sigma A/Ds) have been proposed to radically reduce the size, cost and power consumption of digital ultrasound beamformers. Simply replacing conventional A/Ds with single bit oversampled versions, however, produces significant image artifacts for a dynamic focus system. In addition, spectral Doppler measurements are severely compromised. Here, the authors disclose a complete beamformer exploiting oversampling principles on both transmit and receive that doesn't suffer from these problems. The architecture preserves the simplicity of an oversampled design, yet produces high quality B-scan and color flow images, as well as sensitive spectral Doppler measurements. Here, the authors present simulations and emulations using actual array data, to demonstrate the capabilities of the system.
ISSN:1051-0117
DOI:10.1109/ULTSYM.1997.663335