نتائج البحث : يوجد 2

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مقالة
HIDDEN FEATURES DETECTION USING HISTOGRAM MODIFICATION IN MRI IMAGES

المؤلف: Samar O. Essa
ﺎﻠﻤﺠﻟﺓ: Al-Nahrain Journal of Science مجلة النهرين للعلوم ISSN: (print)26635453,(online)26635461 السنة: 2010 المجلد: 13 الاصدار: 2 الصفحات: 99-104
الجامعة: Al-Nahrain University جامعة النهرين - جامعة النهرين

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الخلاصة

Magnetic Resonance Imaging (MRI) uses magnetization and radio waves, rather than x-rays tomake very detailed, cross- sectional pictures of the brain. In this work we are going to explain someprocedures belongs contrast and brightness improvement which is very important in theimprovement the image quality such as the manipulation with the image histogram. Its has beenexplained in this worked “the histogram shrink i.e. reducing the size of the gray level gives a dimlow contrast picture is produced, where, the histogram stretching of the gray level was distributedon a wide scale but there is no increase in the number of pixels in the bright region. The histogramequalization has also been discuss together with its effects of the improvement of the image clarity

تضمن البحث استخدام صور أجهزة الرنين المغناطيسيوالمستخدمة امواج راديوية ومغناطيسية على عكس اشعةاكس للكشف عن حالات سرطان الدماغ. أن استخدام هذهالتقنية الحديثة لأغراض الكشف المبكر عن الأورامالسرطانية يعتبر من التطبيقات الطيبة المهمة إلا أن اغلبالصور المستحصلة تحوي على ضوضاء عالية بحيثيصعب في بعض الأحيان تحديد الورم ودرجة تطوره،وكذلك يتطلب ذلك مفسرين متمرسين في هذا الموضوع

الكلمات المفتاحية


مقالة
0.1 Second versus 0.2 Second pulse duration of Frequency Doubled Nd: YAGLaser in treatment of Clinically Significant Diabetic Maculopathy

المؤلفون: Najah K. Al-Quriashi* H.Dip.Laser-FICMS (Oph) نجاح القريشي --- Samar O. Essa**
ﺎﻠﻤﺠﻟﺓ: Journal of the Faculty of Medicine مجلة كلية الطب ISSN: 00419419 السنة: 2009 المجلد: 51 الاصدار: 1 الصفحات: 112-115
الجامعة: Baghdad University جامعة بغداد - جامعة بغداد

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الخلاصة

Background: clinically significant macular edema (CSME) is the commonest cause of visual loss inpatients with diabetes mellitus and laser focal photocoagulation is the golden standard for treating it.Patients and Methods: A frequency doubled Nd: YAG laser was used to treat all eyes included inthis study with diabetic maculopathy. Thirty eyes of three insulin dependent and twenty six noninsulin dependent diabetic Iraqi patients were included. The study involved twenty six males, threefemales and followed for one year. Their ages were ranging between 36- 59 years, all of them frompatients attending ophthalmic out-patient department in the medical city in the period between January2005 and June 2006. Eyes divided in to two groups (fifteen eyes in each group) and the diseaseseverity was taken into account. The first group treated with 0.1 second and second group with 0.2second pulse duration.Results: In group (1) improvement of V.A occurred in 19.99% (Statistically significant) and 60%(Statistically significant) in group (2). There was stabilization 80% (Statistically insignificant) ingroup (1) and 33.33% Stabilization (Statistically significant) in group (2), while worsening only ingroup (2) 6.67%(Statistically insignificant).Conclusion: The frequency doubled Nd:YAG laser is effective in controlling diabetic macularoedema when applied in focal treatment. The setting of 100μm 0.2sec., pulse exposure time showmore improvement in V.A. than 100μm 0.1sec.Keywords: Laser, Focal, Photocoagulation.

الكلمات المفتاحية

Laser --- Focal --- Photocoagulation

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