نتایج جستجو برای: magnetic resonance imaging

تعداد نتایج: 737343  

Alia Saberi, Amirreza Ghayeghran, Mozaffar Hosseininezhad, Samaneh Kazemi, Seyed-Ali Roudbary,

Introduction: Bacterial meningitis is an acute infectious inflammation of the protective membranes covering the brain. Its early diagnosis is vital because of its high morbidity and mortality. It is mostly diagnosed by a gold standard diagnostic tool i.e. Cerebrospinal Fluid (CSF) analysis. However, it is sometimes difficult and or impossible to do this procedure and an alternative diagnostic t...

Introduction: Segmentation of brain images especially from magnetic resonance imaging (MRI) is an essential requirement in medical imaging since the tissues, edges, and boundaries between them are ambiguous and difficult to detect, due to the proximity of the brightness levels of the images. Material and Methods: In this paper, the graph-base...

Mehdi Behroozi, Mohammad Reza Daliri,

Functional magnetic resonance imaging (fMRI) has become the most popular method for imaging of brain functions. Currently, there is a large variety of software packages for the analysis of fMRI data, each providing many features for users. Since there is no single package that can provide all the necessary analyses for the fMRI data, it is helpful to know the features of each software package. ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بوعلی سینا - دانشکده مهندسی 1391

مسئله تقسیم بندی تصاویر magnetic resonance imaging(mri)به صورت اتوماتیک یک مسئله پیچیده می باشد. در این گزارش روش جدیدی جهت پیدا کردن تعداد قسمت های تصاویر مغز و تقسیم بندی اتوماتیک جهت تصاویر mri مغزی نرمال و غیر نرمال ارائه گردیده است. هدف در روش اتوماتیک قسمت بندی تصویر این است که تعداد قسمت های یک تصویر با توجه به آنتروپی آن تشخیص داده شود و دیگر اینکه با تشخیص صحیح تعداد قسمت های تصویر دقت...

Journal: Nanomedicine Journal 2020

Bimodal imaging combines two imaging modalities in order to benefit from their advantages and compensate the limitations of each modality. This technique could accurately detect diseases for diagnostic purposes. Nanoparticles simultaneously offer diagnostic data via various imaging modalities owing to their unique properties. Moreover, bimodal nanoprobes could be incorporated into theranostic s...

Ali Shakeri-Zadeh Jaber Beik Ziaeddin Abed

Introduction: Photothermal therapy (PTT) is a nanotechnology-assisted cancer hyperthermia approach in which the interaction between laser light and plasmonic nanoparticles generates a localized heating for thermoablation of the tumor. Recent efforts in the area of PTT follow two important aims: (i) exploitation of targeting strategies for preferential accumulation of plasmonic ...

Akbar Bayat Basir Hashemi, Tayebe Kazemi

Basal encephalocele is a rare craniofacial anomaly. In the present paper we report a 10-year-old boy presented with cleft palate, congenital nystagmus, and hypertelorism. During preoperative evaluation for cleft palate repair, a pulsatile mass was detected in the pharynx. Magnetic resonance imaging showed sphenoethmoidal type of basal encephalocele and agenesis of corpus callosum. Neurosurgical...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علم و صنعت ایران - دانشکده مهندسی برق 1388

سکته های قلبی همواره از اصلی ترین و شایع ترین دلایل مرگ و میر در جهان بوده اند. تشخیص سکته های قلبی در مراحل اولیه کمک قابل توجهی به درمان بیماران سکته قلبی می کند. برای تشخیص سکته های قلبی روش هایّ متفاوت و مختلفی وجود دارد. از جمله این روش ها استفاده از سیگنال های ecg یا تصویربرداری cmri است. علاوه بر این روش ها، روشی که به تازگی مورد توجه قرار گرفته است استفاده از پتانسیل های سطحی بدن برای تش...

Journal: :annals of military and health science research 0
محمود فقیه mahmoud faghih department of cardiology, besat hospital, tehran, iran. کوروش راسخ korosh rasekh department of cardiology, besat hospital, tehran, iran. شبنم مددی shabnam madadi rajaie cardiovascular medical and research center, iran university of medical sciences, tehran, iran. امیرعباس لشگری amir abbas lashgari director of educational affair in university medical branch of tehran, md and student of ph.d level sport physiology branch heart and respiratory سارا ادیمی sara adimi university of social welfare and rehabilitation sciences, and student of ph.d level sport physiology branch heart and respiratory, tehran, iran.

purpose: to assess the relationship between the severity of coronary arteries involvement and the extent and pattern of myocardial scars in cardiac magnetic resonance of patients with history of remote myocardial infarction. materials and methods: the cardiac magnetic resonance images of sixty patients with history of remote st segment or non-st segment elevation myocardial infarction were revi...

Journal: :international journal of hospital research 0
fatemeh amiri student research committee, kermanshah university of medical sciences, kermanshah, iran maryam pourkaveh radiology department, faculty of para medicine, hamadan university of medical sciences, hamadan, iran abbas haghparast medical physics and medical engineering department, faculty of medicine, kermanshah university of medical sciences, kermanshah, iran amir hossein hashemian research center for environmental determinants of health (rcedh), kermanshah university of sciences, kermanshah, iran

background and objectives: multiple sclerosis (ms) is the most common demyelinating disease of the central nervous system with more than 5.2 million people across the world being afflicted with. magnetic resonance im­aging (mri) is a valuable tool in the diagnosis of ms. this study surveys the results of mri of the central nervous system and paranasal sinuses in the sample of ms patients in ker...

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