2016_Imaging for Physicists

Source-to-Background Algorithms

Line profile

PET image

I source

T = C·I source

+ I bg

I bg

signal intensity

position

 Constant C determined from phantom measurements  Works very well for quasi-spherical lesions  Value of C depending of different factors: ● Lesion size and shape ● Scanner type and calibration ● Reconstruction protocol ● Image analysis software

Schaefer et al, EJNMMI 2008; 35(11): 1989-99.

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ESTRO Teaching Course Advanced Imaging: PET – Reconstruction, Contouring