پديد آورنده :
هشياري پور، شيلا
عنوان :
سرشت‌نمايي ويژگي‌هاي الاستيك بافت‌‌هاي زيستي نرم با استفاده از الاستونگاري فراصوت
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
طراحي كاربردي
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مكانيك
صفحه شمار :
ص، 114ص.: مصور، جدول، عكس(رنگي)، نمودار
يادداشت :
ص. ع. به فارسي و انگليسي
استاد راهنما :
حميدرضا ميردامادي
توصيفگر ها :
الاستوگرافي فراصوت (الاستونگاري) , بافت نرم , ويژگي مكانيكي , سفتي بافت , موج برشي , مدول برشي , شبيه‌سازي اجزاي محدود , فانتوم
استاد داور :
سعيد ضيايي راد، محمد دانش
تاريخ ورود اطلاعات :
1396/04/25
چكيده انگليسي :
115 Elastic Property Characterization of Soft Tissues Using Ultrasound Elastography Sheila Hoshyaripour S hoshyaripour@me iut ac ir Date of Submission 2017 5 28 Department of Mechanical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor Hamid Reza Mirdamadi hrmirdamadi@cc iut ac irAbstract In many diseases such as cancer atherosclerosis and hepatitis dramatic changes in the mechanicalproperties of the soft tissue are observed Elastography is a technique for imaging tissue stiffness and may beused to detect disease and evaluate its degree of progression Demand for elastography is perceived due togrowing number of individuals dealing with cancer late detection and financial and emotional cost of biopsy Several methods have been proposed for elastography over the past two decades which are different in theexcitation method or the measured quantity These techniques can be divided into two general groups shearwave imaging and strain imaging This project aims to prepare the appropriate background for developingtechnical knowledge of new ultrasound elastography techniques such as shear wave imaging methods Bycomparing ultrasound elastography techniques the most proper method is selected for precise analysis Elastography simulation is performed for elastic and viscoelastic models in three steps excitation wavegeneration and elasticity map reconstruction Elasticity reconstruction is performed using time to pickdisplacement method and Radon sum transformation method Simulation goal is to validate shear andYoung s modulus reconstruction methods To compare accuracy precision and resolution of the simulationoutput with experiment gelatin phantoms with desired stiffness are developed and their Young s moduli aremeasured through elastography and compression test It is observed that shear modulus and elasticity mapreconstruction is possible with proper resolution accuracy and precision Experiments and simulationscomplement each other and simulation is representative of the part of the experiment which is done inside theelastography system processor Keywords Ultrasound elastography Soft tissue Mechanical property Tissue stiffness Shear wave Shearmodulus FEM simulation Phantom
استاد راهنما :
حميدرضا ميردامادي
استاد داور :
سعيد ضيايي راد، محمد دانش
