IDEXX Laboratories, Inc.
LATERAL FLOW ASSAY READER BASED ON HUMAN PERCEPTION AND METHOD RELATING THERETO

Abstract:

An instrument for reading a lateral flow assay device by detecting color changes based on human perception includes an optics module having a camera, a signal processor, a storage memory and a comparator circuit. The storage memory has stored therein a dataset of sample readings of reference assay devices similar in structure and function to that of the lateral flow assay device. The sample readings are based on human visual perceptions of colorimetric changes in the detection zones of the reference assay devices. The comparator circuit compares the measured colorimetric data relating to the assay device read by the instrument with the stored database of sample readings based on human visual perceptions of the colorimetric changes of the reference assay devices, and generates a comparison signal which is provided to the signal processor. The signal processor generates a determination signal indicative of the presence, absence or quantity of an analyte.