久保田 光博¹, 長沢 亨², 山下 安雄², 小林 久雄⁴, 南里 和秀⁴, 石川 順子⁴, 布施川 久恵³, 田島 知郎¹, 三富 利夫¹

Mitsuhiro KUBOTA¹, Tohru NAGASAWA², Yasuo YAMASHITA², Hisao KOBAYASHI⁴, Kazuhide NANRI⁴, Junko ISHIKAWA⁴, Hisae FUSEGAWA³, Tomoo TAJIMA¹, Toshio MITOMI¹

¹東海大学医学部第二外科, ²東海大学医学部ME学, ³東海大学医学部臨床病理学, ⁴東海大学病院超音波検査室

¹Departments of Surgery 2, Tokai University School of Medicine, ²BioMedical Engineering, Tokai University School of Medicine, ³Clinical Pathology, Tokai University School of Medicine, ⁴Ultrasound Laboratory, Tokai University Hospital

キーワード : Ultrasonic image analysis, Breast tumor morphology, Deformity index, Marginal area index, Entropy

Qualitative morphological categories ("shape" and "border") of diagnostic criteria for breast tumors can be transformed to measurable parameters, such as Deformity Index (DI), Marginal Area Index (MAI) and Entropy. These parameters were measured on model figures (circle, ellipse and star) and typical ultrasoic patterns of breast tumor including cysts, fibroadenomas and cancers. Among these three parameters DI and Entropy are thought to be simple and useful in expressing irregularities of figures or tumor shapes. Some problems to be overcome in establishing quantitative methods in ultrasonic diagnosis of breast tumors are discussed with a review of the literature.