Abstract
The principles of biomedical ultrasound beam forming control the quality of diagnostic imaging. Beam parameters associated with imaging quality are: (1) lateral and axial resolutions; (2) depth of field; (3) contrast and (4) frame rate. In this paper, we review some of the current beam forming techniques and their principles. We focus on trade-offs among the above four aspects of beam forming and relate them to system parameters such as aperture size, f-number (the ratio between focal length and aperture diameter), central frequency (wavelength), system bandwidth and sidelobes. Methods for steering conventional and limited diffraction beams with array transducers are also reviewed.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 403-428 |
| Number of pages | 26 |
| Journal | Ultrasound in Medicine and Biology |
| Volume | 20 |
| Issue number | 5 |
| DOIs | |
| State | Published - 1994 |
Keywords
- Arrays
- Bandwidth
- Beam forming
- Focused beams
- Gaussian beams
- Grating lobes
- Imaging
- Limited diffraction beams
- Localized waves
- Nondestructive evaluation
- Scan
- Sidelobes
- Steering
- Subluminal
- Subsonic
- Superluminal
- Tissue characterization
- Ultrasonic transducers
- Unweighted beams
- Weighted beams
ASJC Scopus subject areas
- Radiological and Ultrasound Technology
- Biophysics
- Acoustics and Ultrasonics
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