Low annihilation counts, and thus low trues rates, especially combined with high randoms rates, are limiting factors of OSEM reconstruction algorithms, as previously discussed.
The prevalence of stroke/transient ischaemic attack increased with higher random blood glucose levels, with adjusted odds ratios of 1.00, 1.06, 1.14, 1.23, 1.35 and 1.64 at random blood glucose levels of <4.8 (reference), 4.8 5.7, 5.8 6.7, 6.8 7.7, 7.8 11.0 and ≥11.1 mmol/l, respectively (P for trend <0.0001).
Edges with higher random-walk betweenness are expected to be more important for the spread of information across the system and, if the load is excessive, bottleneck effects could even appear.
Our model was based on a set of only nine explanatory variables and on an outcome with known high random error.
Patient-specific dosimetry is possible even in a scenario with low true coincidences and high random fraction, as in 90Y PET imaging, granted that accurate absolute PET calibration is performed and acquisition times are sufficiently long.
The results of this research are sufficient to conclude, with some caveats, that patient-specific dosimetry is possible even in a scenario with low true coincidences and high random fraction, as in 90Y PET imaging, granted that accurate absolute PET calibration is performed and acquisition times are sufficiently long.
However, the large dose variability at the voxel level most likely due to a scenario with low true coincidences and high random fraction raises questions about the possibility of using dDVH for radiobiological modeling if acquisitions are performed with a non-TOF scanner.
Sparse cubature rules which are necessary to scope with high dimensional random spaces are considered in [22].
The outer xy-surface of the samples was prepared with high contrast random speckles at a characteristic size of a few image pixels.
Theorem 2. With high probability, random saturated secondary structures generated by the Zipf distribution have O log2 n) external loops and stem length O log n/ log log n).
During a single iteration, for each patient, the programmed model selects the incubation period with the highest random number for that iteration.
