A report from the Editor for Nuclear Science Symposium Contributions to IEEE Transactions on Nuclear Science
نویسندگان
چکیده
منابع مشابه
MAP Reconstruction From Spatially Correlated PET Data - Nuclear Science, IEEE Transactions on
High sensitivity 3-D PET data is often rebinned into 2-D data sets in order to reduce the computation time of reconstructions. The need to precorrect the 3-D data for attenuation, accidentals, scatter, and deadtime effects before rebinning along with the rebinning process itself changes the statistics of the data. This paper presents an approach for finding and using the statistics of Fourier r...
متن کاملOn complete-data spaces for PET reconstruction algorithms - Nuclear Science, IEEE Transactions on
As investigators consider more comprehensive measurement models for emission tomography, there will be more choices for the complete-data spaces of the associated expectation-maximization (EM) algorithms for maximumlikelihood (ML) estimation. In this paper, we show that EM algorithms based on smaller complete-data spaces will typically converge faster. We discuss two practical applications of t...
متن کاملNmis - 07 Submitted to Ieee Transactions on Nuclear Science , March 2002 Second
We consider detection of high-energy photons in PET using thick scintillation crystals. Parallax effect and multiple Compton interactions such crystals significantly reduce the accuracy of conventional detection methods. In order to estimate the photon line of flight based on photomultiplier responses, we use asymptotically optimal nonlinear techniques, implemented by feed-forward and radial ba...
متن کاملThe Role of Cerium Sites in the Scintillation Mechanism of LSO - Nuclear Science, IEEE Transactions on
The crystal structure of Luz(Si04)0:Ce ("LSO") has two trivalent cation sites which may be occupied by Ce3* to form luminescence centers. Previous investigations revealed the existence of two distinct sets of Ce3' excitation and emission spectra and suggested that the differences in the spectra are due to differences in the crystal fields at the two lattice sites that shift the 5d levels of Ce"...
متن کاملRemoval of the Continuum of X-Ray Spectra Using Morphological Operators - Nuclear Science, IEEE Transactions on
In energy dispersive X-ray fluorescence analysis, the estimation and removal of the continuum on which the X-ray spectrum is superimposed is a primary requirement. The algorithms commonly used are either complex, or in the case of, e.g., neural network algorithms, computation-intensive. They usually require strong constraints and/or hypotheses on the data or the shape of the continuum. Moreover...
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ژورنال
عنوان ژورنال: IEEE Transactions on Nuclear Science
سال: 2003
ISSN: 0018-9499,1558-1578
DOI: 10.1109/tns.2003.815810