Description
Calculate blank-corrected and control-relative stain signals.
Histology records connect specimen/cassette/slide identity, section position, image calibration, stain references and evaluable area. Linear and area scales differ, and section pitch is not automatically thickness. Supplied measurements and labels do not inspect tissue, validate preparation or establish a diagnosis.
Calculate blank-corrected and control-relative stain signals.
When to use this tool
Use Stain Control Blank Reference Value when you already have sampleSignal, blankSignal, controlSignal and need to calculate blank-corrected and control-relative stain signals.
How to use the tool and how it works
- Enter sampleSignal, blankSignal, controlSignal. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read blankCorrected, controlRelative. Use the output convention below.
Require controlSignal!=blankSignal; return sample-blank and (sample-blank)/(control-blank).1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| sampleSignal | Sample Signal | Required. Finite number. |
| blankSignal | Blank Signal | Required. Finite number. |
| controlSignal | Control Signal | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| blankCorrected | Blank Corrected | Required. Finite number. |
| controlRelative | (sample-blank)/(control-blank), with a nonzero signed denominator; not constrained to [0,1]. | Required. Finite number. |
{
"input": {
"sampleSignal": 30,
"blankSignal": 10,
"controlSignal": 50
},
"output": {
"blankCorrected": 20,
"controlRelative": 0.5
}
}Limitations and assumptions
- Compatible signal units are assumed and the ratio may be signed or outside [0,1]; no stain, control acceptability, positivity or clinical interpretation is inferred.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Reconcile original specimen and processing records with calibrated images and the complete analytical method. Keep evaluable-area, control and section-depth definitions explicit; local ratios, identifier splits and nominal scales do not validate anatomical or diagnostic conclusions.
References
Similar or alternative tools
- Immunoassay Control Normalized Signal
Normalize a sample signal between supplied blank and positive-control signals.
- Tissue Positive Area Fraction
Calculate supplied positive area as a fraction of evaluable tissue area.