Covariance approximation for fast and accurate computation of channelized Hotelling observer statistics

  title={Covariance approximation for fast and accurate computation of channelized Hotelling observer statistics},
  author={Jinyi and Leahy},
  • Jinyi, Leahy
  • Published 1999
We describe a method for computing linear observer statistics for maximuma posteriori (MAP) reconstructions of PET images. The method is based on a theoretical approximation for the mean and covariance of MAP reconstructions. In particular, we derive here a closed form for the channelized Hotelling observer (CHO) statistic applied to 2D MAP images. We show reasonably good correspondence between these theoretical results and Monte Carlo studies. The accuracy and low computational cost of the… CONTINUE READING


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