US 2015/0031135 A1 · CALIBRATION METHOD FOR REAGENT CARD ANALYZERS

Abstract

A method for calibrating an imager of a reagent analyzer, comprises positioning a dry reagent pad at a first read position in a field of view of the imager, the first read position illuminated by an illumination source with a first intensity, detecting a reference optical signal by the imager, indicative of a first reflectance value of the dry reagent pad at the first read position, positioning the dry reagent pad at a second read position, the second read position illuminated with a second intensity different from the first intensity, detecting a first optical signal by the imager, indicative of a second reflectance value of the dry reagent pad at the second read position, and calculating, by a processor, a calibration factor for the dry reagent pad at the second read position based on a difference between the reference optical signal and the first optical signal.

Claims22

Dependent claims

An automated method for calibrating an imager of a reagent analyzer, comprising:

positioning a dry reagent pad at a first read position in a field of view of the imager, the first read position illuminated by an illumination source with a first intensity;
detecting a reference optical signal by the imager, the reference optical signal indicative of a first reflectance value of the dry reagent pad at the first read position;
positioning the dry reagent pad at a second read position in the field of view of the imager, the second read position illuminated with a second intensity different from the first intensity;
detecting a first optical signal by the imager, the first optical signal indicative of a second reflectance value of the dry reagent pad at the second read position;
and
calculating, by a processor executing processor executable code, a calibration factor for the dry reagent pad at the second read position based on a difference between the reference optical signal and the first optical signal.

3 more elements

A method comprising:

advancing a reagent pad through a plurality of read positions in a field of view of an optical imager;
detecting by the optical imager optical signals indicative of a reflectance value of the reagent pad at the plurality of read positions;
designating, by a processor executing processor executable code, at least one of the plurality of read positions as a reference position;
calculating, by the processor, a set of position-correction factors for at least one of the plurality of read positions other than the reference position by using the optical signal detected at the at least one of the plurality of read positions other than the reference position and the optical signal detected at the reference position;
and
storing, by the processor, the set of position-correction factors for the at least one of the plurality of read positions other than the reference position in a non-transitory computer medium.

3 more elements

Dependencies are inferred from the claim text.

Calibration method for reagent card analyzers

Life of this patent

Calibration method for reagent card analyzers

Life of this patent

Abstract

Claims22