title: Rapid and simple quantitative measurement of alpha-fetoprotein by combining immunochromatographic strip test and artificial neural network image analysis system.
abstract: BACKGROUND
  Quantitative immunochromatographic strip (ICS) assay can facilitate clinical diagnosis by providing more information than traditional qualitative or semiquantitative strip assay.
  
  
  METHODS
  We constructed a human serum alpha-fetoprotein (AFP) measurement system by combining semiquantitative ICS tests and artificial neural network (ANN) image analysis system [immunochromatographic strip analyzed by artificial neural network image analysis system (IAIS)]. After ICS tests completed, the AFP concentration can be obtained from analysis of IAIS software. The equipment required are commercial semiquantitative AFP dipstick, optical scanner, centrifuge (option), personal computer, and software of IAIS.
  
  
  RESULTS
  The serum AFP concentrations measured by IAIS were strongly correlated (r = 0.9971) with that by RIA. Using Bland-Altman analysis, the IAIS achieved clinical acceptable limits of agreement in comparison with RIA. The within-run precision of IAIS, expressed as coefficients of variation (CV), at 81.7 ng/ml was 1.50% and, at 244.4 ng/ml, was 1.09%. The measurement of serum AFP by IAIS can be completed in 20 min.
  
  
  CONCLUSIONS
  The newly constructed quantitative immunochromatographic strip assay (IAIS) is a simple, rapid, and reliable method for serum AFP measurement. With the simple equipment required, the IAIS can be performed outside the laboratory and is ideal for outpatient or point-of-care AFP testing.
authors.affiliation: Department of Obstetrics and Gynecology, National Cheng Kung University Medical College and Hospital, Tainan, Taiwan.
authors.forename: Louise
authors.initials: L
authors.lastname: Chuang
authors.forename: Jeng-Yang
authors.initials: JY
authors.lastname: Hwang
authors.forename: Hen-Chang
authors.initials: HC
authors.lastname: Chang
authors.forename: Fong-Ming
authors.initials: FM
authors.lastname: Chang
authors.forename: Shiang-Bin
authors.initials: SB
authors.lastname: Jong
mesh_terms: D014408:Biomarkers, Tumor / Q000032:analysis*; D006801:Humans; D016571:Neural Networks, Computer; D011863:Radioimmunoassay / Q000379:methods; D011934:Reagent Strips; D012680:Sensitivity and Specificity; D000509:alpha-Fetoproteins / Q000032:analysis*
chemical_list: D014408:Biomarkers, Tumor; D011934:Reagent Strips; D000509:alpha-Fetoproteins