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Absolute Thresholding
ESTRO Teaching Course Advanced Imaging: PET – Reconstruction, Contouring
32
signal intensity
position
I
max
: SUV=4.3
PET image
Line profile
SUV
thres
=2.5
Fix SUV-threshold of 2.0/2.5
Easy to implement
Often fails when the physiologic background activity lies above the
threshold
Absolute SUVs are strongly influenced by various technical factors
(scan protocol, image acquisition, reconstruction, scanner
calibration, etc.)
I
bg