نتایج جستجو برای: mri مغز
تعداد نتایج: 112692 فیلتر نتایج به سال:
چکیده ندارد.
بررسی اثر قرارگیری در میدانهای الکترومغناطیسی ناشی از تصویرنگاری به روش تشدید مغناطیسی هسته برروی میزان آزاد شدن جیوه از آمالگام های دندانی دکتر سید محمدجواد مرتضوی1- افسانه یزدی2- دکتر کاظم خیابانی3- دکتر علی کاووسی4- دکتر رضا وزیری نژاد5- بدرالسادات به نژاد6- سیمین مهدیزاده7 1- دانشیار فیزیک پزشکی مرکز پژوهشهای علوم پرتوی دانشگاه علوم پزشکی شیراز و عضوگروه بیوشیمی- بیوفیزیک دانشکده پزشکی دا...
Factors Associated with Requesting Magnetic Resonance Imaging during the Management of Glomus Tumors
Background: The characteristic clinical presentation of glomus tumors and the low negative predictive value of themagnetic resonance imaging (MRI) raise the question whether MRI improves their management. Therefore, this studyaimed to investigate whether MRI improved the management of glomus tumors.Methods: In total, 87 patients with a histologically confirmed glomus tumor wer...
Background and Objective: Neonatal neurological diseases are characterized by a range of clinical symptoms and signs that can be confirmed by Magnetic Resonance Imaging (MRI) in some cases. This study aimed to examine the neonatal cerebral MRI descriptively. Materials and Methods: In this comparative cross-sectional study, 69 MRI neonatal images were analyzed from January to April 2019. These ...
سابقه و هدف: ADEM ( Acute disseminating encephalomyelitis ) یک بیماری اتوایمیون است که در آن به دنبال محرکی ناشناخته، واکنشی ایمونولوژیک در میلین فعال می شود و تشابه فراوانی با مالتیپل اسکلروزیس ( MS ) دارد. میزان بروز انسیدانس آن نامعلوم است. در کشورهای در حال توسعه در زمینه عفونت ها ی تنفسی فوقانی آتیپیک رخ می دهد و سایر عوامل اتیولوژی ک آن ناشناخته است. بزرگسالان جوانان و بچه ها بیشتر به آن ...
Background: Finding an acute brain lesion by diffusion-weighted (DW) MRI upon an episode of transient ischemic attack (TIA) is a predictor of imminent stroke in the near future. Therefore, exploring risk factors associated with lesions in DW-MRI of the brain is important in adopting an approach to TIA management. In the current study, we tried to determine the risk factors associated with lesio...
symptomatic laryngeal chondrometaplasia is rare. to the best of our knowledge, there are only few case reports on laryngeal chondrometaplasia. the imaging appearance of this uncommon disease is even more rarely described. there are only two case reports describing its appearances in computed tomography (ct) and magnetic resonance imaging (mri). ultrasound (us) features have not been reported so...
background: in this study the basic radiation properties of n-isopropylacrylamaide polymer gel dosimeter were determined together with verification of its soft tissue equivalency. materials and methods: the nipam gel was prepared and irradiated approximately 2 h after manufacturing. the magnetic resonance (mr) images were made 24 h after irradiation. the nuclear magnetic resonance (nmr) respons...
purpose t1wi (t1 weighted image) was acquired in order to grade bone fusion following the studies by fifa (federation internationale de football associations). research using images other than t1wi has not been reported. the aim of this study is to evaluate the grade of epiphyseal fusion by t2* weighted images (t2*wi) and to investigate new findings on t2*wi as compared with t1wi. methods a tot...
A method for optimizing MR imaging pulse sequence parameters in a statistical framework is presented. Parameters are defined to be optimal when the resulting scalar images yield optimal image segmentations using Bayesian pixel classification. Thus, Bayes risk is used as the objective function to minimize. Approximations are made to give a tractable solution in a four-step procedure. A sample ca...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید