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4D-PET/CT
Respiratory organ or lesion motion induces
degradation effects on PET/CT data
4D-PET/CT acquisition improves image quality and
quantitative accuracy
ESTRO Teaching Course Advanced Imaging: PET – Reconstruction, Contouring
12
time [s]
0
50
100
amplitude [a.u.]
Breathing Signal:
●
Respiratory monitoring synchronized
to 4D-PET and 4D-CT
l
Pressure sensor
l
Spirometry system, …
●
4D-PET
l
Preferentially recorded in 3D mode
l
data sorted into different phases of the
breathing cycle
Prospective sorting
Retrospective (list mode acq.)
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4D-CT for phase-sensitive attenuation
correction!
PET acquisition time: