نتایج جستجو برای: mri images

تعداد نتایج: 352511  

Introduction: Corpus callosum (CC) as an intracranial organ is located in midline of cerebrum communicating both right and left hemispheres. CC undergoes morphological changes in multiple sclerosis (MS). Since the morphometrical changes of organs are directly associated with geographical regions, thus the aim of this study was to investigate the morphological alteration of CC in patients with r...

Abbas Haghparast, Ghasem Hajianfar Hassan Maleki Isaac shiri Mehrdad Oveisi

Introduction: Advanced quantitative information such as radiomics features derived from magnetic resonance (MR) image may be useful for outcome prediction, prognostic models or response biomarkers in Glioblastoma (GBM). The main aim of this study was to evaluate MRI radiomics features for recurrence prediction in glioblastoma multiform.   Materials and Methods:</str...

2011
RAJNEET KAUR NAVEEN AGGARWAL

Classification is very important part of digital image analysis. It is a computational procedure that sort images into groups according to their similarities. MRI is latest medical imaging technology. Magnetic Resonance Imaging used for Knee scans is very useful and effective technique to detect the knee joint defects. It is a non-invasive method to take picture of knee joint and the surroundin...

A.R. Nikofar, B. Bolouri, H.R. Baghani, M. Robatjazi, S.R. Mahdavi,

Background: For the purpose of individual clinical target volume assessment in radiotherapy of prostate cancer, MRSI was used as a molecular imaging modality with MRI and CT images. Materials and Methods: The images of 20 prostate cancer patients were used in this study. The MR and MRSI images were registered with CT ones using non-rigid registration technique. The CT based planning (BP), CT/MR...

Journal: :Journal of the Chinese Medical Association : JCMA 2005
Mei-Kang Yuan Ping-Hong Lai Jeong-Yu Chen Shu-Shong Hsu Huei-Lung Liang Lee-Ren Yeh Clement Kuen-Huang Chen Ming-Ting Wu Huay-Ben Pan Chien-Fang Yang

BACKGROUND Acute subarachnoid hemorrhage (SAH) has traditionally been diagnosed by computed tomography (CT); however, fluid-attenuated inversion recovery (FLAIR) is a magnetic resonance imaging (MRI) modality currently used to detect acute SAH. CT is insensitive in the detection of subacute or chronic SAH. The purpose of this study was to compare 4 MRI pulse sequences and CT in the detection of...

Journal: :iranian journal of radiology 0
maryam mohammadzadeh assistant professor, department of radiology, division of neuroradiology, amiralam hospital, tehran university of medical sciences, tehran, iran; md, assistant professor, department of radiology, division of neuroradiology, amiralam hospital, tehran university of medical sciences, tehran, iran

in this regards first of all cross sectional anatomy of salivary glands and different diagnostic modalities such as ultrasound, cat scan, conventional mri and nuclear studies will be discussed. advanced mri modality such as dce (dynamic susceptibility enhanced) imaging will be introduced. then various pathologies of salivary glands including infectious, benign and malignant neoplastic processes...

Journal: :journal of dental research, dental clinics, dental prospects 0
behrooz davachi mahrokh imanimoghaddam professor of oral and maxillofacial radiology, oral and maxillofacial diseases research center, mashhad university of medical sciences, mashhad, iran mohamad reza majidi ahmad sahebalam masoomeh johari adineh javadian langaroodi

background and aims. although salivary gland tumors are not very common, early diagnosis and treatment is crucial because of their proximity to vital organs, and therefore, determining the efficacy of new imaging procedures becomes important. this study aimed to evaluate the efficacy of magnetic resonance imaging (mri) and color doppler ultrasonography parameters in the diagnosis and differenti...

2008
Bharti Sharma

Real world signals usually contain departures from the ideal signal that would be produced by our model of the signal production process. Such departures are referred to as noise. Noise arises as a result of unmodelled processes going on in the production and capture of the real signal. It is not part of the ideal signal and may be caused by a wide range of sources, e.g. variations in the detec...

Journal: :Biological psychiatry 2013
Mark S Bolding Meredith A Reid Kathy B Avsar Rosalinda C Roberts Paul D Gamlin Timothy J Gawne David M White Jan A den Hollander Adrienne C Lahti

BACKGROUND Magnetic resonance imaging (MRI) has multiple contrast mechanisms. Like various staining techniques in histology, each contrast type reveals different information about the structure of the brain. However, it is not always clear how structures visible in MRI correspond to structures previously identified by histology. The purpose of this study was to determine if magnetic transfer co...

Abbasi Asl, Reza, Kamali, Fatemeh, Menhaj, Mohamad Bagher , Suratgar, Amir Abolfazl ,

Introduction: Encoding models are used to predict human brain activity in response to sensory stimuli. The purpose of these models is to explain how sensory information represent in the brain. Convolutional neural networks trained by images are capable of encoding magnetic resonance imaging data of humans viewing natural images. Considering the hemodynamic response function, these networks are ...

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