Screening Observation
Definition
A finding used to guide further examination without claiming specific material identification. Screening can guide further examination while allowing alternative causes. An invalid result instead fails a required condition for the method’s intended interpretation.
- Context
- Result categories
For example, an optical response can guide a search location without being reported as a specific chemical or biological identification.
Do not report invalid as negative or presumptive as certain identification. Apply the assay’s controls and decision rules to the result actually obtained.
Related terms
- ALS
- Illumination used to search for or document optical responses under selected conditions. Excitation conditions, viewing filters and background affect what is visible....
- Barrier Filter
- An optical long-pass filter placed over the camera lens and worn as goggles by the examiner during ALS examination; blocks the excitation...
- Irradiance
- Radiant power incident per unit area; distinct from electrical lamp power. Unwanted wavelengths can pass through a measurement path and add signal...