Sentence examples for mean background value from inspiring English sources

For threshold-based methods, considering background uptake reduced the inclusion of background by ensuring the threshold value used for delineation was above the mean background value, even for low contrast lesions.

After the registration and deformation of the images, each voxel in a VOI of the 18F-FAZA images was normalized to the mean background value (obtained from corresponding VOIs posterior of the sternum) in order to calculate a T/Bg.

The definition of the signal to noise used in this study is shown in the following equation: [19] mathrm{S}mathrm{N}mathrm{R} = frac{left|overline{s}-overline{b}right|}{sigma_b} (1 where ( overline{s} ) is the mean signal value, ( overline{b} ) is the mean background value, and σ b is the standard deviation of the background.

We then used this mean background value to surrogate beads with intensity below this average.

The R software was used to quantile-normalized, and to minimum-replaced (a surrogate-replacement policy) values below background using the mean background value of the built-in Illumina probe controls as an alternative to background subtraction (which may introduce negative values) to reduce 'over inflated' expression ratios in subsequent steps.

The threshold value is currently chosen to be above the mean background value.

Chemical analyses showed that the concentration of various heavy metals was higher than the mean background values for Portuguese soils, and higher in superficial soils.

The mean background values (responses without antigen) were for the PBS control group 8390±2135 and for the HSP70 group 10 100±27410

The results were calculated by subtracting the mean background values from the values obtained under each test condition and were expressed as the percentages of the control (untreated cells) values.

The signal-to-noise ratios (S/N) in Fig. 3D were calculated as a ratio of the difference between mean signal and mean background values to the background standard deviation [ 22] in order to compare the sensitivity of the on-chip assay with the in-well assays.

Close contact pixels are defined as pixels with 8-bit gray values smaller than the mean background gray value.