Using radial k-space sampling and temporal filters in MRI to improve temporal resolution
Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
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.
fMRI, MRI, radial sampling, k-space, temporal filters
Medical Laboratory and Measurements Technologies
IdentifiersURN: urn:nbn:se:liu:diva-65433ISRN: LIU-IMH/RV-A--10/003--SEOAI: oai:DiVA.org:liu-65433DiVA: diva2:395734
Magnusson, MariaDahlqvist Leinhard, OlofLundberg, Peter
Tölli, Heikki, University lecturer
This Master thesis work were performed at Dept. Radiation Physis, Linköping University, but examined at Dept. Radiation Physics, Umeå University2011-02-082011-02-072015-03-17Bibliographically approved