The Linogram Algorithm and Direct Fourier Method with Linograms
1991 (English)Report (Other academic)
The conventionai map of projection data will here be called the sinogram map. Among the algorithms used with this map of data there are two of main interest for this paper: the Filtered Back Projection (FBP) and the Direct Fourier Method (DFM). FBP is the most popular algorithm used in commercial eT machines although it is computationally expensive compared to the DFM. The reason for its popularity is that FBP gives better pictures than the DFM uniess the lat ter is used with very careful interpolations.
In this paper another map of projection data will be presented, here called the linogram map. The FBP may be implemented with this map in a particularly simple way, here called the Linogram Algorithm (LA). In this the back projection, which is so computationally expensive with the sinogram map, can be reduced to a computationally inexpensive series of FFT's.
Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press , 1991. , 21 p.
Report / Department of Radiology, Linköping University, 1990-1997, ISSN 1102-1799 ; 65
Radiology, Nuclear Medicine and Medical Imaging
IdentifiersURN: urn:nbn:se:liu:diva-57738ISRN: LIU-RAD-R-065OAI: oai:DiVA.org:liu-57738DiVA: diva2:327658
In the printed version the ISSN 0348-7679 is incorrect. The correct ISSN is 1102-1799.2010-06-302010-06-302010-07-08Bibliographically approved