These efficiencies can be computed by comparing the number of coincidence counts obtained when the crystals are equally illuminated by the same source. However, ...
Missing: 3D | Show results with:3D
May 1, 2000 · The results showed that the iterative methods are more accurate when large efficiency variations exist and that only the fully 3-D methods ...
Missing: 3D | Show results with:3D
Jul 17, 2002 · Abstract. We describe a method for normalization in 3D PET for use with maximum a posteriori (MAP) or other iterative model-based image ...
Each rebinned sinogram is then reconstructed using some 2D iterative algorithm. This hybrid approach provides a significant time gain with respect to fully 3D ...
This paper extends this work to allow the accurate modeling of crystal efficiency, detector deadtime, and the native block-based detector geometry. In order to ...
An accurate TOF system matrix can be calculated analytically, if inter-crystal scatter effect, photon acollinearity, and position range effect are negligible.
In this article we present a review of the different approaches used to address the problem of how to model, calculate and store the system matrix.
This paper extends this work to allow the accurate modeling of crystal efficiency, detector deadtime, and the native block-based detector geometry. In order ...
Both TV regularization and Bregman iteration require the computation of the derivative of the total variation with respect to each coefficient in the finite ...
Missing: calculation | Show results with:calculation
The norm3d HDF5 file stores crystal efficiency factors which are read as an array of 448 × 45 in STIR. The 3D geometric correction factors are stored as a part ...