title: Quantitative chromatics analysis for computer imaging of cytologic subtypes of lung cancer stained by Papanicolaou stain.
abstract: OBJECTIVE
  To determine the role of quantitative chromatics analysis in the classification of subtypes of lung cancer stained by Papanicolaou stain.
  
  
  METHODS
  By means of computer image analysis, 60 keratinized squamous carcinoma cells (KSCC), 88 nonkeratinized squamous carcinoma cells (NKSCC) and 150 adenocarcinoma cells (ACC) from lung cancer in sputum smears stained by Papanicolaou stain were analyzed and distinguished based on quantitative colorimetry. The features measured were the content of three primary colors, red (R), green (G) and blue (B) and the coefficients of R, G and B (r, g and b, respectively). Hue, saturation, brightness and gray level were also measured. A stepwise discriminant analysis was carried out.
  
  
  RESULTS
  The values of R, G and B and r, g and b, hue and saturation in NKSCC and ACC were significantly different from those of KSCC, and the changes in the three primary colors were more sensitive than those in the gray level. Computer assessment based on three primary color coefficients, hue and saturation yielded accuracy of distinguishing KSCC from NKSCC and KSCC from ACC of 95.2% and 95%, respectively.
  
  
  CONCLUSIONS
  Quantitative analyses of R, G and B and r, g, b and hue and saturation are valuable in distinguishing KSCC from NKSCC and ACC.
authors.affiliation: Department of Pathology, First Military Medical University, Guangzhou, People's Republic of China.
authors.forename: H
authors.initials: H
authors.lastname: Shen
authors.forename: Y D
authors.initials: YD
authors.lastname: Lu
authors.forename: Y X
authors.initials: YX
authors.lastname: Zhang
authors.forename: Y J
authors.initials: YJ
authors.lastname: Piao
mesh_terms: D000230:Adenocarcinoma / Q000145:classification* / Q000473:pathology; D002294:Carcinoma, Squamous Cell / Q000145:classification* / Q000473:pathology; D004396:Coloring Agents; D003581:Cytodiagnosis / Q000379:methods; D006651:Histocytochemistry; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D008175:Lung Neoplasms / Q000145:classification* / Q000473:pathology; D013183:Sputum / Q000166:cytology; D013194:Staining and Labeling / Q000379:methods*
chemical_list: D004396:Coloring Agents