Abstract
A new method has been developed and tested for correcting for the effects of accidental coincidences and photon attenuation in positron-emission tomography. A mathematical model is used for these effects as the basis for the development. The corrections are incorporated into the iterations of an expectation-maximization algorithm for numerically producing the maximum-likelihood estimate of a distribution of radioactivity within a patient. We have found the images reconstructed with this new procedure to be unbiased and to exhibit lower variance than those reconstructed from precorrected data.
Original language | English |
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Pages (from-to) | 82-89 |
Number of pages | 8 |
Journal | IEEE Transactions on Medical Imaging |
Volume | 10 |
Issue number | 1 |
DOIs | |
State | Published - Mar 1991 |