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Visual asymmetric appearance; An asymmetry can be introduced into the attenuation-corrected PET images when using iterative reconstruction in combination with a specific number of subsets and reconstruction matrix sizes. (This problem only occurs when using protocols other than the default Biograph protocols)
Incorrect Decay Correction Results - ECAT System's software versions 7.2.2 and 7.4 calculate the decay correction for emission data incorrectly, while performing whole-body studies with all transmissions followed by all emissions.