NDLI: Sampling requirements of projection signals in 3D PET

Content Provider	IEEE Xplore Digital Library
Author	Yingbo Li Kummert, A. Boschen, F. Herzog, H.
Copyright Year	2005
Description	Author affiliation: Fac. of Electr., Inf. & Media Eng., Wuppertal Univ., Germany (Yingbo Li; Kummert, A.; Boschen, F.)
Abstract	In this paper the spectral properties of projection signals of 3D PET are analyzed. In particular, under the application of the 3D version of Fourier slice theorem, the inhomogeneous spatial distribution of frequency samples in the reconstructed 3D object spectrum is clarified. The analysis also reveals the fact that the 3D operating mode of a PET scanner is actually only a pseudo-3D measuring mode. Distinct regions in the reconstructed object spectrum benefit differently from the additional so-called cross-plane measurements. Due to the existence of redundancy in the 4D projection signals of the 3D PET, no means exists to establish an accurate and uniform sampling grid for the projection signal. To overcome this burden, an alternative form of projection as integral over planes is introduced. Based on the sampling pattern acquired for these new projection signals, approximate assertions can be made concerning the sampling requirements for the projection of 3D PET.
Starting Page	166
Ending Page	171
File Size	925601
Page Count	6
File Format	PDF
ISBN	3981029984
DOI	10.1109/NDS.2005.195348
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-07-10
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	GMT Gesellschaft fuer Medizin und Technik
Subject Keyword	Detectors Reconstruction algorithms Image sampling Sampling methods Extraterrestrial measurements Frequency Positron emission tomography Image reconstruction Biomedical imaging Information analysis
Content Type	Text
Resource Type	Article

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