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العنوان
Application of ultasound waves in biological media/
الناشر
Ashraf T. Ibrahim,
المؤلف
Ibrahim,Ashraf T.
هيئة الاعداد
باحث / اشرف طلعت ابراهيم
مشرف / نور الدين حسن اسماعيل
uhassau58@live.com
مشرف / منى ابراهيم لطفى
monai110@yahoo.com
مناقش / مظهر بسيونى طايل بسيونى
مناقش / على مصطفى
الموضوع
Ultrasonic medecine
تاريخ النشر
1999 .
عدد الصفحات
iii, 117P.:
اللغة
الإنجليزية
الدرجة
ماجستير
التخصص
الهندسة الكهربائية والالكترونية
تاريخ الإجازة
1/1/1999
مكان الإجازة
جامعة الاسكندريه - كلية الهندسة - الهندسة الكهربية
الفهرس
Only 14 pages are availabe for public view

from 16

from 16

Abstract

‎Ultrasound 111 0.1 - 1 [’\’11 17. frequency range has several properties that fovor its use In localized hypertherl11io. Due 10 its short wavelength and favoroble absorption characterislics, ullrasonic energy can be focused into a sllloller version and achieve grealer depth of penetration than can microwave energy. I\s n result of rhis focusing ndvanlages, ultrasound is capable of crealing a lelllperalme rise in tUlllor deep inside the body which is 1110re uniform nnd conlrolloble 111‎This thesis inllOduces some opplicorions of ultrasonic.
‎It comprises seven chaplers:
‎The first chapler introduces on introduelion which shows the properties of sound, physicol principles of ullrrtsound, and the use of ullrasonic in medicine specially in delel’lnining Ihe acoustic charocterislies of biological tissues.
‎The second chapler, discusses the clwraclerislics of transducers which convert cleclric;d energy In rnechanical energy depending on piezoeleelric effecl. I\lso. acousric pulse generalion and rhe charocteriSlic irnpedance and
‎reson:lI1ce ore discussed.
‎The third clwpler, includes Ihe fundarnentrtls of the finite difference method and its two coses implicit and explicit methods. I\lso the advantages and disadvanloges of Ihe Iwo methods and Ihe stabilily condirion are presented.
‎The fomth chopter, includes the renection coefficient due 10 uJlrrtsouncl incidence on rt Irtyered mediulll. We assume three layers and five Irtyers
‎rncdia for cxrtrnp!es. I\s rtn :1I1nlir”’;nn tJ,~ ,,:_ ••• _. __ .
c<1n be determined by using the concept of the renection coefficient from a multi J<1yered medium shown in 1his cIwpter.
‎The fifth clwpter, includes fin ‎Ch:lpter six, is devoted 10 the ultrasollnd phascd ‎FiJwl1y, in chapter seven, the discussion of the results obtained (lnd the
‎conclusion (Ire presented.