Evaluation of null subtraction imaging and interpolation techniques for ultrasound B-mode

In biomedical ultrasound imaging, many attempts have been made to improve the lateral resolution through various adaptive and non-adaptive techniques. While each technique has its advantages and disadvantages, there are some challenges common to all methods. In particular, improvements in lateral resolution are often accompanied by a reduction in contrast, and while the -6 dB beamwidth calculated from the point-spread function may be much smaller than that of conventional techniques, these methods often do not perform as well on the Sparrow test for resolution. Another challenge presented by high-resolution techniques is related to the limited lateral sampling of ultrasound data. Conventional techniques for upsampling and interpolating the data have demonstrated limited success. This study focuses on evaluating one particular super-resolution method, null subtraction imaging, under these conditions while also demonstrating methods to overcome the challenges previously encountered with this method.

Name thesis:degree_name

M.S.

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Electrical & Computer Engr

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2019

Author dc:creator

• Agarwal, Anil

Contributors dc:contributor

• Oelze, Michael L.

• ultrasound imaging
• beamforming
• apodization
• null subtraction imaging
• interpolation

Statement dc:rights

• Copyright 2019 Anil Agarwal

Language dc:language

en

Handle dc:identifier

http://hdl.handle.net/2142/104871

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/104871