title: Computer-based classification of dermoscopy images of melanocytic lesions on acral volar skin.
abstract: We describe a fully automated system for the classification of acral volar melanomas. We used a total of 213 acral dermoscopy images (176 nevi and 37 melanomas). Our automatic tumor area extraction algorithm successfully extracted the tumor in 199 cases (169 nevi and 30 melanomas), and we developed a diagnostic classifier using these images. Our linear classifier achieved a sensitivity (SE) of 100%, a specificity (SP) of 95.9%, and an area under the receiver operating characteristic curve (AUC) of 0.993 using a leave-one-out cross-validation strategy (81.1% SE, 92.1% SP; considering 14 unsuccessful extraction cases as false classification). In addition, we developed three pattern detectors for typical dermoscopic structures such as parallel ridge, parallel furrow, and fibrillar patterns. These also achieved good detection accuracy as indicated by their AUC values: 0.985, 0.931, and 0.890, respectively. The features used in the melanoma-nevus classifier and the parallel ridge detector have significant overlap.
authors.affiliation: Department of Electronic Informatics, Hosei University Faculty of Engineering, Koganei, Tokyo, Japan. iyatomi@hosei.ac.jp
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Iyatomi
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Oka
authors.forename: M Emre
authors.initials: ME
authors.lastname: Celebi
authors.forename: Koichi
authors.initials: K
authors.lastname: Ogawa
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Argenziano
authors.forename: H Peter
authors.initials: HP
authors.lastname: Soyer
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Koga
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Saida
authors.forename: Kuniaki
authors.initials: K
authors.lastname: Ohara
authors.forename: Masaru
authors.initials: M
authors.lastname: Tanaka
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D046169:Dermoscopy / Q000379:methods*; D003936:Diagnosis, Computer-Assisted / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008544:Melanocytes / Q000473:pathology; D008545:Melanoma / Q000145:classification* / Q000175:diagnosis / Q000473:pathology; D008875:Middle Aged; D009506:Nevus / Q000145:classification* / Q000175:diagnosis / Q000473:pathology; D012680:Sensitivity and Specificity; D012878:Skin Neoplasms / Q000145:classification* / Q000175:diagnosis / Q000473:pathology