About Calibrations in DoseControl
What is a ‘Calibration’?
A Calibration is a short word for a ‘Dosimeter Batch Calibration’ (also called a Dosimetry System Calibration).
The end-user typically performs a Dosimeter Batch Calibration for each dosimeter ‘batch’, the irradiation pathway, and a specific reader (spectrophotometer). The Calibration is a set of operations that establish, under specified conditions, the relationship between values of quantities indicated by a measuring instrument or measuring system, or values represented by a material measure or a reference material, and the corresponding values realized by (dose) standards. Routine dosimetry systems should be calibrated in accordance with the requirements of ISO/ASTM 51261.
As a result of the Dosimeter Batch Calibration activities, the certified calibration laboratory will provide the end-user with a calibration curve. The calibration curve is a mathematical expression of the relation between dosimeter response and corresponding value of dose certified traceable to a national or international standard dose.
👉 Read More: How DoseControl calculates dose
Calibration format used by DoseControl
You calibration laboratory must be fit the calibration curve as Response = f(Dose), where dosimeter response is the dependent variable y, and dose is the independent variable x.
Response (R) = a + bx + cx^2 + dx^3 + ex^4
where R = (Ai-Ao)/T
How do Calibrations work in DoseControl?
The end-user will input the calibration curve coefficients provided by the lab into the Calibration setup screen in the DoseControl software. DoseControl software will use the calibration curve coefficients to calculate dose.
A Calibration is specific to an active dosimeter Batch, active Reader, and active irradiation Pathway in the software. If any of these items are “inactive”, the Calibration will automatically inactivate.
You must have an active Calibration to measure dosimeters in the software.
👉 Next Step: Setup a new Calibration in DoseControl