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001-es BibID:BIBFORM015775
Első szerző:Kovács György (programtervező matematikus, fizikus)
Cím:Development and error-analysis of sinogram correction methods for MiniPET-II / Gy. Kovács, G. Opposits, S. A. Kis, L. Balkay, L. Trón, M. Emri
Megjegyzések:Background: The examination of small animals using high resolution in-vivo imag- ing methods is a crucial tool in pharmaceutical research projects. To suffice this demand, a small animal PET camera has been developed in our institute as part of a R+D project. The implementation of image reconstruction components was an important part of the development. In order to reduce the high time- and computation-demand of the full 3D reconstruction, data acquired in 3 dimensions have to be separated into 2D slices (rebinning) followed by 2D filtered backprojection (FBP) and iterative reconstruction algorithms. Our detector system is polygonally shaped, thus the sinograms we use for 2D reconstruction are not continuous, which may interfere with the reconstruction process. The aim of the study was the adaptation and analysis of the methods for the estima- tion of missing data in the sinograms of polygonal detector systems, and the elabopration of a new method based on special segmentation techniques. Results: We succeeded in working out a new mathematical algorithm to generate the missing data used during image reconstruction. This method was compared to 3 conventional procedures using real and simulated data. The traditional single slice method was used for the rebinning followed by the FBP and ML-EM image reconstruction algorithms. The comparison was carried out applying profile curve and ROI analysis. Conclusions: The performed tests revealed that our method provides results similar to those by conventional methods and, at the same time, it has the benefit of having lower noise sensitivity.
Tárgyszavak:Orvostudományok Klinikai orvostudományok idézhető absztrakt
Megjelenés:Nuclear Medicine Review. Central & Eastern Europe. - 12 : 1 (2009), p. 36. -
További szerzők:Opposits Gábor (1974-) (fizikus, szoftver fejlesztő) Kis Sándor Attila (1973-) (fizikus) Balkay László (1963-) (biofizikus) Trón Lajos (1941-) (biofizikus) Emri Miklós (1962-) (fizikus)
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