Image counts per pixel per second were calibrated to activity concentrations (Bq/ml) by measuring a 3.5-cm cylinder phantom filled with a known concentration of F-FDG [ 16, 17].
Image counts per second per voxel (cps/voxel) were calibrated to activity concentrations (Bq mL− 1) by measuring a 3.5 cm cylinder phantom filled with a known concentration of radioactivity.
The fluorescence output of the dye can be calibrated to analyte concentration based on intensity or lifetime.
Fluorescence measurements were calibrated to Ca2+ concentration using the method of Cheng et al. (4).
A small ROI within the femoral arteries (ROIartery) was manually placed on 3 5 consecutive transaxial slices (Additional file 1: Figure S1) within PMOD, and the combined counts from both arteries were used to define the [18F]FMISO blood curve calibrated to the plasma concentrations.
This method was calibrated to detect fentanyl concentrations above 0.05 ng ml-1.
This technique can be calibrated to give actual concentrations resulting from known amounts of TMA added in a very small region and enables both volume fraction and tortuosity to be calculated.
Specifically, the output voltage from the radiation detector was calibrated to known radioactivity concentration, as measured by a dose calibrator and a precision scale.
A PLSR model was calibrated to predict astaxanthin concentration from novel images, and showed good results with a RMSEP of 0.27.
The system was calibrated to measure TFB concentration using standard aqueous sodium tetrafluoroborate solutions.
The resulting dynamics are not, however, calibrated to units of concentration in mass balance, due to the relative nature of two-color microarray measurement technology.
