2016_Imaging for Physicists

Normalization

 LORs have different sensitivities  Individual correction factor for each LOR Correction Methods:  Direct Normalization ● Illumination of all possible LORs with planar or rot. line source ● Long scan times necessary ● Sources must have very uniform activity distribution

Mean radial geometric profiles for three block-detectors. Asymmetry due to the fact that centre of rotation of sources not coincident with center of detector ring (from [2]).

ESTRO Teaching Course Advanced Imaging: PET – Reconstruction, Contouring  Component-based Model for Normalization

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