Effects of swept scanning on velocity estimation
Journal
Ultrasonic Imaging
Journal Volume
27
Journal Issue
1
Pages
1-20
Date Issued
2005-01
Author(s)
G.-S. Jeng
Abstract
The swept-scan technique adopted in high-frequency ultrasound involves mechanically scanning a single-element transducer to acquire image data. Unlike conventional step scanning, where the image data are acquired at discrete positions, the swept-scan technique acquires the image data while the transducer is continuously moving. Such a scanning method is particularly advantageous for Doppler flow estimation because its frame rate is higher than that for the step-scan technique. However, the effects of the transducer motion on the accuracy of velocity estimation have not been studied comprehensively. This study employed a κ-space approach to experimentally investigate the effects of swept scanning on both conventional Doppler axial velocity estimation and spectral-broadening-based lateral velocity estimation using a 45-MHz transducer. The results indicate that such effects must be corrected in order to obtain an accurate estimation of flow velocities. Copyright 2005 by Dynamedia, Inc.
Subjects
Doppler flow estimation; High-frequency ultrasound; Swept scanning; Vector velocity estimation; κ-Space
Other Subjects
Image acquisition; Scanning; Transducers; Ultrasonic applications; Vector spaces; Velocity; Accurate estimation; Flow estimation; High frequency ultrasounds; Single element transducers; Spectral broadening; Swept-scanning; Vector velocities; Velocity estimation; Frequency estimation; article; Doppler flowmetry; image analysis; transducer; ultrasound
Type
journal article