Segmented Attenuation Correction for PET
نویسنده
چکیده
We describe a hybrid measured/calculated method for attenuation correction in positron emission tomography (PET). This unified reconstruction/segmentation method is based on a penalized weighted least-squares (PWLS) objective function that is minimized using iterative coordinate-descent (ICD). Two penalty functions are compared; one for a discrete object parameterization, the other for a continuous parameterization. Simulations demonstrate that the methods can reduce the additional emission image variance typically introduced by noisy attenuation correction factors (ACFs).
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