نتایج جستجو برای: gradientecho mri

تعداد نتایج: 105910  

Journal: Asia Oceania Journal of Nuclear Medicine and Biology 2015
Eku Shimosegawa, Hiroki Kato, Jun Hatazawa, Kayako Isohashi, Kentaro Fukushima, Mitsuaki Tatsumi, Tadashi Watabe, Tetsuo Maeda, Yuzuru Kanakura,

Objective(s): Post-treatment evaluations by CT/MRI (based on the International Working Group/ Cotswolds meeting guidelines) and PET (based on Revised Response Criteria), were examined in terms of progression-free survival (PFS) in patients with malignant lymphoma (ML). Methods: 79 patients, undergoing CT/MRI for the examination of suspected lesions and whole-body PET/CT before and after therapy...

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2017
Carla Lorena Vasques Mendes de Miranda Camila Soares Moreira de Sousa Nathalie Gonçalves Nascimento Pinheiro Cordão Breno Braga Bastos Francisco Edward Mont'Alverne Filho

1. Hospital Casa de Portugal, Rio de Janeiro, RJ, Brazil. 2. Instituto Estadual do Cérebro Paulo Niemeyer, Rio de Janeiro, RJ, Brazil. Mailing address: Dr. Tiago Medina Salata. Rua do Bispo, 72, Rio Comprido. Rio de Janeiro. RJ, Brazil, 20261-064. E-mail: [email protected]. imaging with absence of typical movement disorder symptoms (hemichorea-hemiballism). J Radiol Case Rep. 2013;7:1–9...

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ژورنال: مجله دانشگاه علوم پزشکی گیلان 2005
بصیری, کیوان, خسروی, سعید, زارع, محمد,

چکیده مقدمه : رفلکس چشمک (Blink Reflex) یکی از تست های الکترودیاگنوستیک است که معادل الکتروفیزیولوژیک رفلکس قرنیه می باشد.پاسخ این رفلکس بصورت امواج R1 و R2 و R2C می باشد. اختلالات این امواج در ضایعات ساقه مغز گزارش شده است . هدف: در این مطالعه توانایی رفلکس چشمک در تشخیص سکته‌های ساقه مغز در مقایسه با یافته‌های MRI بررسی شده است . مواد و روش‌ها :‌ بیست و دو بیمار مبتلا به سکته ساقه مغز ب...

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2005
HUI LIU Yi Pan Hui Liu Michael Weeks Anu Bourgeois Yichuan Zhao

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Journal: :the archives of bone and joint surgery 0
hossein ebrahimipour health sciences research center, department of health and management, school of health, mashhad university of medical sciences, mashhad, iran seyedeh zahra mirfeizi rheumatic diseases research center, school of medicine, mashhad university of medical sciences, mashhad, iran ali vafaee najar health sciences research center, department of health and management, school of health, mashhad university of medical sciences, mashhad, iran amir reza kachooei orthopedic research center, mashhad university of medical sciences, mashhad, iran amir shahriar ariamanesh mashhad university of medical sciences, mashhad, iran reza ganji department of orthopedic surgery, north khorasan university of medical sciences, bojnurd, iran

background: knee pain is one of the most common reasons patients visit their physician. in this regard magnetic resonance imaging (mri) is the tool of preference for diagnosis. the aim of this study was to determine appropriate guidelines for knee mri administration using the rand appropriateness method (ram)-2013   methods: this qualitative study was done in the mashhad university of medical s...

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ژورنال: :مجله علمی دانشگاه علوم پزشکی گرگان 0
مریم برزین barzin m نشانی : ساری ، بیمارستان امام خمینی ، بخش رادیولوژی ، تلفن 2261708-0151 ، نمابر 3218086 روح اله عبدی abdi r حمید گل محمدی golmohammadi h

زمینه و هدف : صدمات داخلی ناشی از ترومای زانو شیوع نسبتاً بالایی دارند و برای بررسی آسیب احتمالی منیسک ها و لیگامان های متقاطع زانو، تصویربرداری با تشدید مغناطیسی (magnetic resonance imaging: mri) به طور مکرر انجام می شود. در حالی که استفاده از سونوگرافی برای تشخیص ضایعات داخلی مفصل زانو هنوز مورد اختلاف نظر بوده و مطالعات گذشته نتایج متفاوتی به همراه داشته است. این مطالعه به منظور تعیین ارزش تش...

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Journal: :iranian journal of radiation research 0
s.m. abtahi shahid beheshti university, nuclear engineering faculty, tehran, iran m. shahriari shahid beheshti university, nuclear engineering faculty, tehran, iran m.h. zahmatkesh novin medical radiation institute, tehran, iran h. khalafi nuclear science and technology research institute, tehran, iran sh. akhlaghpoor novin medical radiation institute, tehran, iran s. bagheri novin medical radiation institute, tehran, iran

parameters that have to be measured in gel dosimetry. however, the resolution in gel is strongly dependant on gel composition. selection of optimum method in dose response readout and proper values of parameters can result in noise reduction as well as improvement of contrast, and spatial resolution considerably. materials and methods: magica polymer gel dosimeters were manufactured and irradia...

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Journal: :iranian journal of medical physics 0
m. ashkanmehr m.sc. in nuclear engineering dept., islamic azad university, tehran, iran. n. riyahi alam associate professor, physics and biomedical engineering, tehran university of medical sciences, tehran, iran. research center for science & technology in medicine, imam khomeini hospital, tehran. iran. m.a. oghabian associate professor, physics and biomedical engineering, tehran university of medical sciences, tehran, iran. research center for science & technology in medicine, imam khomeini hospital, tehran. iran. a. ghasemzadeh m. sc. in research center for science & technology in medicine, imam khomeini hospital, tehran. iran. m. bakhtiary m. sc. in research center for science & technology in medicine, imam khomeini hospital, tehran. iran. h. ghanaati associate professor, radiology dept., medical imaging center, imam khomeini hospital, tehran university of medical sciences , tehran, iran.

introduction:  image  distortion  is  one  of  the  major  problems  of  magnetic  resonance  imaging  (mri) for use in 3dmri, velocity mri, fmri and radiotherapy treatment planning (rttp). it is  widely known that the most obvious effect of the inhomogenity of the magnetic fields and the  nonlinearity  of  the  gradient  is  the  geometric  distortion  of  mr  tomograms.  in  this  study,  the...

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Journal: :iranian journal of medical physics 0
m.a. oghabian associate professor, physics and biomedical engineering, tehran university of medical sciences, tehran, iran. research center for science & technology in medicine, imam khomeini hospital, tehran. iran. sh. mehdipour m.sc. in research center for science & technology in medicine, imam khomeini hospital, tehran. iran. n. riahicalam associate professor, physics and biomedical engineering, tehran university of medical sciences, tehran, iran. research center for science & technology in medicine, imam khomeini hospital, tehran. iran. b. rafie b. sc. in medical imaging center, imam khomeini hospital, tehran university of medical sciences, tehran, iran. h. ghanaati associate professor, radiology dept., medical imaging center, imam khomeini hospital, tehran university of medical sciences, tehran, iran.

introduction: one of the major causes of image non-uniformity in mri is due to the existence of  non-homogeneity in rf receive and transmit. this can be the most effective source of error in  quantitative  studies  in  mri  imaging.  part  of  this  non-homogeneity  demonstrates  the  characteristics of rf coil and part of it is due to the interaction of rf field with the material being  imaged...

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Journal: :basic and clinical cancer research 0
tahere zare msc of medical physics, department of medical physics, school of medicine, shiraz university of medical sciences, shiraz, iran naghmeh sattarahmady department of medical physics, school of medicine, shiraz university of medical sciences, shiraz, iran

recent advances in nanotechnology have rapidly developed new therapeutic and diagnostic concepts in all aspects of medicine. magnetic nanoparticles (mnps) can be simultaneously functionalized and guided by a magnetic field, thus providing promising tools for several biomedical applications. mnps contrast agents at low concentrations offer the potential to significantly improve existing methods o...

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