The inter-calibration source variance component was close to zero.
The source variance is set to σ θ 2 = 1 Watt.
The inter-calibration source variance, σ C F d A 2 was the main component of the total variance (77%).
The inter-calibration source variance estimate, σ S R 2, represented 73.4% of the total variance estimate.
The largest source of variability in the calibration factor CFdA was the inter-calibration source variance component, representing 77% of the total variance.
The standard deviation over the 84 measurements was equal to 2.3%, and the main component of the variance was the intra-calibration source variance.
Poisson noise introduced by the count acquisition process should ideally comprise the majority of intra-calibration source variance, but represented only 3.3% of the variance.
The effect of the background count rate variance σ γ B k R 2 on the calibration source count rate was close to zero and very small compared to the inter-calibration source and intra-calibration source variance estimates.
The rate estimation algorithm receives in input the source variance, the correlation noise variance, the quantization step size, and the number of bitplanes to be encoded and returns the average number of bits needed to decode each bitplane.
Imprecision or inaccuracy in the manually recorded time of the calibration source activity measurement or unsynchronized clocks between the radionuclide activity meter and the camera may also explain some of this intra-calibration source variance component.
