User manual
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Color reciprocal linear vs. dose: X (D) =A + B / (D-C) where X (D) is the response
at dose D and A, B and C are coefficients to be determined. This function is used
as the default.
Color rational (linear) vs. dose: X (D) = (A + BD) / (D+C) where X (D) is the
response at dose D and A, B and C are coefficients to be determined.
Color rational (quadratic) vs. dose: X (D) = P2 (D) / (D+E) where X (D) is the
response at dose D; P2 (D) = AD
2
+ BD +C and A, B, C, and E are coefficients to
be determined.
Color rational (cubic) vs. dose: X (D) = P3 (D) / (D+F) where X (D) is the
response at dose D; P2 (D) = AD
3
+ BD
2
+ CD + E and A, B, C, E and F are
coefficients to be determined.
Exponential universal calibration EBT3/Epson 10000XL: X (D) = A + BD
C
where
X (D) is the response at dose D and A, B and C are coefficients to be
determined.
Right click this icon to display or copy/paste the determined coefficients of the
selected fitting functions to another application. The fitting functions are generally
expressed as X (D) = fD and the inverse D = fX (D) where X (D) is the response
expressed as (16-bit value/65535) at dose D in Gy.
Use the Calibration Statistics icon just under the calibration table to display the
calibration statistics in the image panel. This is a table of dose consistency values
determined from the calibration doses values and the fitted values. It provides help in
selecting the fitting function best suited to the data points. Lower values in the table
signify better consistency among the color channels. In this case, and most cases with
doses <500 cGy, the best fitting function is the rational (linear) function.