Change search
ReferencesLink to record
Permanent link

Direct link
Fast Algorithm for Simulation of Signals in Medical Ultrasound Blood Flow Imaging
Norwegian University of Science and Technology, Faculty of Information Technology, Mathematics and Electrical Engineering, Department of Electronics and Telecommunications.
2012 (English)MasteroppgaveStudent thesis
Abstract [en]

The commonly used simulation method Field II, which is based on the spatial impulse response approach, has excellent accuracy in linear domain. However the computational time can be up to many days for one simulation. One of the solutions to this problem is a convolution-based methodology called COLE. It is much faster than Field II and has very good approximation. It generates the data by reducing multi-dimensional convolution model to multiple single-dimensional convolutions. This thesis is about implementing COLE on the FieldSim 3 platform and using it for blood flow imaging. This platform is written in MATLAB with object-oriented programming and it is now under development at department of circulation and medical imaging. Both Field II and real scanner have been used to compare with COLE. The simulated phantom for both simulators was a straight tube with scatterers moving inside, whereas a string phantom was used to get the data from the scanner. The computational time of COLE with 2D Doppler mode scan in FieldSim 3 achieved 85 times faster than Field II. The plotted PW Doppler spectra and the 2D power spectra showed that the velocity resolutions of both simulators were at the same level. COLE had higher noise floor than Field II and scanner in Doppler mode scan. COLE had relatively high sampling frequency requirement compared with Field II. If the sampling frequency was not high enough, COLE would produce side lobes in the PW Doppler spectra.

Place, publisher, year, edition, pages
Institutt for elektronikk og telekommunikasjon , 2012. , 75 p.
Keyword [no]
ntnudaim:8298, MSMEDTEK Medical Technology, Medical Imaging
URN: urn:nbn:no:ntnu:diva-19522Local ID: ntnudaim:8298OAI: diva2:570810
Available from: 2012-11-20 Created: 2012-11-20 Last updated: 2013-06-14Bibliographically approved

Open Access in DiVA

fulltext(2256 kB)2067 downloads
File information
File name FULLTEXT01.pdfFile size 2256 kBChecksum SHA-512
Type fulltextMimetype application/pdf
cover(184 kB)62 downloads
File information
File name COVER01.pdfFile size 184 kBChecksum SHA-512
Type coverMimetype application/pdf

By organisation
Department of Electronics and Telecommunications

Search outside of DiVA

GoogleGoogle Scholar
Total: 2067 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 116 hits
ReferencesLink to record
Permanent link

Direct link