5956

366 دكتري

دكتري

مهندسي برق

اصفهان: دانشگاه صنعتي اصفهان، دانشكده مهندسي برق و كامپيوتر

1390

يازده،134ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

كارولوكس،سعيد صدري

محمد عطايي، نيلوفر قيصري

2/3/90

حميد سلطان نيان زاده، محمدرضا يزدچي، امير فتاحي

مهندسي برق و كامپيوتر

ID366 دكتري

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Asymmetry and Nonlinear Analysis of Breast Thermograms to Establish Possible Difference between Malignant and Benign Patterns Mahnaz Etehadtavakol mahtavakol@yahoo com April 16 2011 Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan 84156 83111 Iran1st Supervisor Caro Lucas 2nd Supervisor Saeed Sadri sadri@cc iut ac ir1st Advisor Mohamad Ataei ataei@eng ui ac ir1st Advisor Niloofar Gheissari n gheissari@cc iut ac irDepartment Graduate Program Coordinator Javad Omidi Tehran University Tehran Iran Isfahan University of Technology Isfahan 84156 83111 Iran Isfahan UniversityAbstractIn this research breast thermal infrared images have been color segmented for the first time The color segmentation has been done with three clustering techniques k means mean shiftand fuzzy c means Furthermore two breasts are separated automatically using a proposedalgorithm Since symmetry usually indicates healthy subjects asymmetrical temperaturedistribution between left breast and right breast could be a strong indicator of abnormality Inaddition mutual information between two breasts can be used as a measure of symmetrybetween two breasts An algorithm to compute the mutual information between right breastand left breast has been proposed in this research In practice most of the real infrared breastimages do not have symmetry boundaries Therefore a registration for two breasts is requiredfor real images The popular algorithm that is shape contexts is applied as a registrationalgorithm and the task is done for any two real breasts successfully As another point of view cancerous cells tumors have irregular shapes which cannot be described by traditional Fractal dimension is proposed as a measure of the rate of irregularity of shapes As a thirdmeasure Lyapunov exponents are used to measure the rate of chaos of tumor boundaries Key WordsThermography Fuzzy c means Mutual information Registration Fractal Dimension Lyapunov exponentsIntroductionNowadays breast cancer is one of the most important issues in women s health today In1960 s one in twenty women is diagnosed by breast cancer however today it is one in eight

كارولوكس،سعيد صدري

محمد عطايي، نيلوفر قيصري

حميد سلطان نيان زاده، محمدرضا يزدچي، امير فتاحي