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Quantitative determination of local radioactivity concentration in positron emission tomography (PET) requires a good attenuation correction procedure to reconstruct the emission image. Using a similar Maximum Likelihood (ML) algorithm as for the reconstruction of the emission image, a method is proposed to reconstruct a transmission image, i.e. a map of(More)
The accurate quantification of single photon emission computed tomography (SPECT) and positron emission tomography (PET) data is limited by partial volume effects (PVE). This study compares two approaches to measure accurately the true tissue tracer activity within a tissue compartment, defined by anatomical side information. The first approach is based on(More)
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