wieviele respiratorische gates? einfluss der anzahl an gates auf atem-getriggerte pet aufnahmen...
TRANSCRIPT
Wieviele respiratorische Gates?
Einfluss der Anzahl an Gates auf atem-getriggerte PET Aufnahmen
Mohammad Dawood, Florian Büther, Ottmar Schober, M Schäfers, Klaus P Schäfers
Euoropean Institute of Molecular Imaging, University of Münster
M. Dawood, European Institute of Molecular Imaging, Münster
Motivation
18F-FDG PET 1 h.p.i., 9 gated Patient data setsOSEM reconstruction from listmode data
M. Dawood, European Institute of Molecular Imaging, Münster
Acquisition of respiratory signal
Dawood et al, Medical Physics, Sep. 2007
M. Dawood, European Institute of Molecular Imaging, Münster
Variations in respiratory signals
Relation between variations in amplitude and cycle length
M. Dawood, European Institute of Molecular Imaging, Münster
Respiratory gating
Dawood et al, Medical Physics, Sep. 2007
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M. Dawood, European Institute of Molecular Imaging, Münster
Motion
M. Dawood, European Institute of Molecular Imaging, Münster
Results: Capturing the motion
Optimal gating is achieved with amplitude based gating using 8 gates
M. Dawood, European Institute of Molecular Imaging, Münster
No change in noise properties with amplitude or time based gatingNoise increases proportionally with the number og gates
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Results: Noise properties
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