Alternating minimization algorithms for transmission tomography using energy detectors

Expectation-minimization algorithms for transmission tomography are extended to account for detectors that are modeled as integrating the energy of the incident X-ray photons. The resulting algorithm is guaranteed to monotonically increase the log likelihood functional. Both the expectation step and...

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Vydáno v:Conference Record of the Thirty-Sixth Asilomar Conference on Signals, Systems and Computers, 2002 Ročník 1; s. 144 - 147 vol.1
Hlavní autoři: O'Sullivan, J.A., Snyder, D.L., Whiting, B.R.
Médium: Konferenční příspěvek
Jazyk:angličtina
Vydáno: IEEE 2002
Témata:
Data models
Extraterrestrial measurements
Image reconstruction
Minimization methods
Physics
Radiology
Single photon emission computed tomography
X-ray detection
X-ray detectors
X-ray imaging
ISBN:0780375769, 9780780375765
ISSN:1058-6393
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Shrnutí:Expectation-minimization algorithms for transmission tomography are extended to account for detectors that are modeled as integrating the energy of the incident X-ray photons. The resulting algorithm is guaranteed to monotonically increase the log likelihood functional. Both the expectation step and the maximization step are given in closed form. The formulation is general enough that it can be extended to other energy-dependent models for the detectors.
ISBN:0780375769
9780780375765
ISSN:1058-6393
DOI:10.1109/ACSSC.2002.1197165