Windowing of wide-band ultrasound transducers
- 24 December 2002
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- Vol. 2 (10510117), 1541-1544
- https://doi.org/10.1109/ultsym.1996.584377
Abstract
A high performance ultrasound imaging system requires precise control of the amplitude of the elements in its aperture, as well as the time delays between them. The authors describe results in imaging with and without such apodizing, and describe a method for controlling channel amplitude which preserves the autonomy between channels characteristic of digital beamformers. As part of the study, the authors investigate how the classical results on windowing transfer to a high-bandwidth system such as an ultrasound scanner. The algorithm allows the array to be dynamically windowed while its aperture grows in proportion to the time after a transmit excitation. Linear and curved arrays, where the phase center changes with beam position, are also accommodated. A surprisingly versatile system is needed to provide a satisfactory apodizing function in all cases. The simulations from a bit-level model of the VLSI implementation of the algorithm show its value in improving beam quality.Keywords
This publication has 4 references indexed in Scilit:
- Aperture formation on reduced-channel arrays using the transmit-receive apodization matrixPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Resolution Issues in Medical UltrasoundPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1985
- Resolution of scanning ultrasonic imaging systems with arbitrary transducer excitationRevue de Physique Appliquée, 1985
- On the use of windows for harmonic analysis with the discrete Fourier transformProceedings of the IEEE, 1978