Spatiotemporal excitation sequence manipulation and processing for Doppler ultrasound and pulse-echo sound speed imaging applications

Over the past several decades, plane wave based ultrasonic imaging applications have dominated the research landscape in biomedical ultrasonography. This is predominantly due to the inherent advantages of coherent plane wave compounding, in which steered plane waves are coherently summed to generate high resolution images with relatively few transmissions, allowing for high frame rate acquisition. However, the vast majority of the research in plane wave based methods neglects the utility of the individually steered plane wave frames. In this work, two novel applications of these frames are developed. The first is a novel application of these frames to extend the maximum detectable velocity in pulsed-wave Doppler ultrasound. This is achieved by a reordering of the frames to minimize the relative phase difference between them while preserving spatial resolution that could be expected using a traditional sequence. The second application, and arguably the more interesting one, is a novel method of exploiting phase differences along different ultrasonic paths to reconstruct maps of local sound speed variations. The majority of this dissertation work will be directed at characterizing this method as well as analyzing the various failure modes associated with it.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Electrical & Computer Engr

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2020

Author dc:creator

• Podkowa, Anthony S

Contributors dc:contributor

• Oelze, Michael L
• Anastasio, Mark
• Insana, Michael
• Song, Pengfei

• Pulse-Echo Sound Speed Imaging
• Doppler Ultrasound
• Color Flow

Statement dc:rights

• © 2020 Anthony S. Podkowa

Language dc:language

en

Handle dc:identifier

http://hdl.handle.net/2142/108700

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/108700