نتایج جستجو برای: تصاویر mri

تعداد نتایج: 121044  

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...

Esna-Ashari, Farzaneh, Rezaee Azandariani, Ahmad, Esnaashari, Masoud , Maghsoodi, Fahimeh ,

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 ...

Journal: :iranian journal of radiology 0
ryan ka lok lee department of imaging and interventional radiology, prince of wales hospital, chinese university of hong kong, hong kong, china; department of imaging and interventional radiology, prince of wales hospital, chinese university of hong kong, hong kong, china. tel: +852-26321247 edmond yuen hok yuen department of imaging and interventional radiology, prince of wales hospital, chinese university of hong kong, hong kong, china victor james abdullah department of ear, nose and throat, united christian hospital, hong kong, china yolanda yim ping lee department of imaging and interventional radiology, prince of wales hospital, chinese university of hong kong, hong kong, china anil tejbhan ahuja department of imaging and interventional radiology, prince of wales hospital, chinese university of hong kong, hong kong, china

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...

Journal: :iranian journal of radiation research 0
a.r. farajollahi department of medical physics, faculty of medicine, tabriz university of medical sciences, tabriz, iran f. pak department of medical physics and biomedical engineering, faculty of medicine, tehran university of medical sciences, tehran, iran m. horsfield department of cardiovascular sciences, university of leicester, leicester royal infirmary, leicester, uk z. myabi department of radiology, emam reza teaching hospital, tabriz university of medical sciences, tabriz, iran

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...

Journal: :asian journal of sports medicine 0
yoshikazu shimada jfa medical center, fukushima, japan; :477 nakauchi, toride-shi, ibaraki 300-1543, japan. daisuke shimao jfa medical center, fukushima, japan; department of radiological sciences, ibaraki prefectural university of health sciences, ibaraki, japan jiro kobayashi jfa medical center, fukushima, japan chikako nakahori jfa medical center, fukushima, japan mariko shimada jfa academy fukushima, fukushima, japan hiroo fujimoto jfa academy fukushima, fukushima, japan

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...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده فنی مهندسی 1387

نانوذرات مگنتیت (fe3o4) کاربردهای زیست دارویی بسیاری از قبیل عامل کنتراست در تصاویر mri، سیستم رهایش دارو وکاربردهای درمانی در دماهای زیاد دارند. به دلیل جلوگیری از کلوخه ای شدن و همچنین سازگاری نانوذرات با بدن انسان، سطح ذرات با عوامل مختلفی اصلاح می شود. از میان روش های اصلاح سطحی، پوشش دهی با طلا به علت زیست سازگار بودن au با بدن انسان و همچین خواص منحصر به فرد آن مورد توجه قرار گرفته است. د...

پایان نامه :دانشگاه تربیت معلم - سبزوار - دانشکده مهندسی برق و کامپیوتر 1393

مالتیپل اسکلروز یا ام اس (ms) یک بیماری التهابی سیستم اعصاب مرکزی است. در اطراف فیبرهای عصبی یک بافت چربی به نام میلین وجود دارد که هدایت الکتریکی پالس های عصبی توسط فیبرهای عصبی تسریع می کند. ام اس هنگامی در بدن آغاز می شود که گلبول های سفید که نقش دفاعی در بدن دارند، به میلین که نقش حفاظتی برای رشته های عصبی دارد، بجای یک عامل بیگانه، حمله می کنند. وقتی میلین یا خود فیبر عصبی، آسیب دیده یا تخ...

Journal: :Medical physics 1995
J L Prince D Pham O Tan

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...

2012
Amit Shah

ADAPTIVE SPACE-TIME PROCESSING FOR DIGITAL MOBILE RADIO COMMUNICATION SYSTEMS

Journal: :journal of dental materials and techniques 0
mahrokh mahrokh imanimoghaddam oral and maxillofacial diseases research center, department of oral and maxillofacial radiology, faculty of dentistry, mashhad university of medical sciences, mashhad, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (mashhad university of medical sciences) azam sadat azam sadat madani department of prosthodontics, faculty of dentistry and dental research center, mashhad university of medical sciences, mashhad, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (mashhad university of medical sciences) elahe elahe mahmoudi hashemi department of oral and maxillofacial radiology, faculty of dentistry, north khorasan university of medical sciences, bojnurd, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی خراسان شمالی (khorasan shomali university of medical sciences)

introduction: it has been shown that joint click, an initial and common finding in internal derangement (id), respond to neither conservative treatment nor surgical intervention. this raises the question as to whether it must be treated in the absence of other pertinent signs and symptoms, so the aim of this study was to investigate and compare the mri findings of tmj in both normal subjects an...

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