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Using radial k-space sampling and temporal filters in MRI to improve temporal resolution
Umeå University, Faculty of Medicine, Department of Radiation Sciences, Radiation Physics.
2010 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In this master thesis methods for increasing temporal resolution when reconstructing radially sampled MRI data have been developed and evaluated. This has been done in two steps; first the order in which data is sampled in k-space has been optimized, and second; temporal filters have been developed in order to utilize the high sampling density in central regions of k-space as a result of the polar sampling geometry to increase temporal resolution while maintaining image quality.By properly designing the temporal filters the temporal resolution is increased by a factor 3–20 depending on other variables such as imageresolution and the size of the time varying areas in the image. The results are obtained from simulated raw data and subsequent reconstruction. The next step should be to acquire and reconstruct raw data to confirm the results.

Place, publisher, year, edition, pages
2010. , 66 p.
Keyword [en]
fMRI, MRI, radial sampling, k-space, temporal filters
National Category
Medical Engineering
URN: urn:nbn:se:umu:diva-48080ISRN: LIU-IMH/RV-A--10/003--SEOAI: diva2:446446
Educational program
Civilingenjörsprogrammet i teknisk fysik
2009-03-20, 13:00 (English)
This Master thesis work was performed at Dept. Radiation Physis, Linköping University, but examined at Dept. Radiation Physics, Umeå UniversityAvailable from: 2011-10-07 Created: 2011-10-07 Last updated: 2011-10-07Bibliographically approved

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