Pixel-based ultrasound image reconstruction: Impact of grid size on signal frequency content

The effect of grid size on the frequency content of the pixel-based image reconstruction algorithms is discussed. It is shown that coarse grid sizes result in simultaneous decimation and down conversion of the axial data. Results of simulations and phantom studies are presented which show the amount...

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Bibliographic Details
Published in2015 IEEE International Ultrasonics Symposium (IUS) pp. 1 - 3
Main Authors Bayat, Mahdi, Nabavizadeh, Alireza, Alizad, Azra, Fatemi, Mostafa
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2015
Subjects
Correlation
Estimation
Frequency estimation
Image reconstruction
Imaging
pixel-based imaging
plane wave imaging
Radio frequency
speckle tracking
Synthetic aperture
Ultrasonic imaging
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Summary:The effect of grid size on the frequency content of the pixel-based image reconstruction algorithms is discussed. It is shown that coarse grid sizes result in simultaneous decimation and down conversion of the axial data. Results of simulations and phantom studies are presented which show the amount of decimation and predicted frequency shifts. The effect of this frequency shift and down-sampling is then studied in terms of a bias in the displacement when narrow-band algorithms are used for speckle tracking.
DOI:10.1109/ULTSYM.2015.0383