2026-09-22T02:45:46Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/108700 2023-07-11 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

text Thesis Oelze, Michael L Oelze, Michael L Anastasio, Mark Insana, Michael Song, Pengfei Podkowa, Anthony S 2020-10-07T22:49:58Z 2020-10-07T22:49:58Z 2022-10-07T22:50:13Z 2020-07-15 2020-08 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. Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2022-08-01 The student, Anthony Podkowa, accepted the attached license on 2020-07-14 at 10:06. The student, Anthony Podkowa, submitted this Dissertation for approval on 2020-07-14 at 10:07. This Dissertation was approved for publication on 2020-07-15 at 09:16. DSpace SAF Submission Ingestion Package generated from Vireo submission #15601 on 2020-10-02 at 15:50:35 Made available in DSpace on 2020-10-07T22:49:58Z (GMT). No. of bitstreams: 3 PODKOWA-DISSERTATION-2020.pdf: 14023471 bytes, checksum: b2a7f3af0af031b89885a4d36dec90bd (MD5) animations.pdf: 30897366 bytes, checksum: e83220fc6e3483443b2b57ed272d0f3b (MD5) LICENSE.txt: 4212 bytes, checksum: 7d2712994483d95f6130264976b6af54 (MD5) Previous issue date: 2020-07-15 Embargo set by: Seth Robbins for item 116329 Lift date: 2022-10-07T22:50:13Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system Author requested closed access (OA after 2yrs) in Vireo ETD system Limited application/pdf http://hdl.handle.net/2142/108700 en © 2020 Anthony S. Podkowa Pulse-Echo Sound Speed Imaging Doppler Ultrasound Color Flow Spatiotemporal excitation sequence manipulation and processing for Doppler ultrasound and pulse-echo sound speed imaging applications Electrical & Computer Eng Electrical & Computer Engr University of Illinois at Urbana-Champaign Dissertation Ph.D.