The calibration implemented using the background radioactivity of the 176Lu applied to the DOI identification using the combined method exhibits comparable results in terms of both mean bias and standard deviation, even if the bias in the entrance and exit regions is larger than that obtained with the lateral scan calibration.
The typical procedures of XAFS data reduction were followed in this study, and consist of averaging successive data scans, calibration to the energy of As(0) foil at 11,867.0 eV [54], background removal using linear or Gaussian functions, normalization to the "free atom" absorbance (i.e., Fermi level) at 11,885.0 eV and extraction of the extended XAFS (EXAFS) portion of the spectrum.
Imaging was performed by scanning a calibration grid of regularly spaced sharp asperities (MicroMasch, Inc).
However, when scanning ICP calibration solutions with elements in isolation, PXRF results indicated near perfect agreement; Ca, K, Fe, Cu and Pb produced an R2 of 0.99 while Zn and Mn produced an R2 of 1.00.
After scanning, a calibration curve based on the concentrations of the aliquots was established.
A phase lookup table is generated for all the different points along a regular orthogonal grid by scanning the calibration beam around the fiber facet and reconstructing the phase pattern for each corresponding spot (as described above).
The slides were first scanned using a pre-scan self calibration procedure that set the photo-multiplier gain for optimal dye resolution.
KBr pellets were dried in oven and scanned for calibration purpose.
Still, further problems can arise from incorrect instrument scan generator calibration [10].
In order to quantify the drug distribution obtained by planar whole-body scans, a calibration factor (in units of cps·MBq−1) was measured using a vial containing 131I-tositumomab imaged in air before each patient image acquisition.
