نتایج جستجو برای: امآرآی t2 قلب و امآرآی t2 کبد

تعداد نتایج: 791239  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید چمران اهواز - دانشکده کشاورزی 1392

چکیده: گرایش روزافزون کشاورزان به تولید ذرت علوفه ای و اهمیت این محصول در جهت حمایت از صنعت دامپروری سبب گردید که پژوهشی با هدف ارزیابی پایداری و کارایی تولید ذرت علوفه ای در شهرستان مرودشت (استان فارس) با استفاده از مدل های فازی، تحلیل فراگیر داده ها (dea)، سامانه اطلاعات جغرافیایی (gis) و تحلیل سلسله مراتبی (ahp) انجام پذیرد. ارزیابی تناسب اراضی با استفاده از gis/ahp از ترکیب خصوصیات خاک و ا...

Journal: :Journal of radiation research 2011
Norihisa Katayama Mitsuhiro Takemoto Kotaro Yoshio Kuniaki Katsui Tatsuya Uesugi Yasutomo Nasu Toshi Matsushita Mitsumasa Kaji Hiromi Kumon Susumu Kanazawa

Computed tomography (CT)/magnetic resonance imaging (MRI) fusion is considered to be the best method for postimplant dosimetry of permanent prostate brachytherapy; however, it is inconvenient and costly. In T2*-weighted image (T2*-WI), seeds can be easily detected without the use of an intravenous contrast material. We present a novel method for postimplant dosimetry using T2*-WI/T2-weighted im...

در این مقاله روشی برای تشخیص بیماری آلزایمر پیشنهاد شده است که با استفاده از تحلیل تصاویر MR مغزی، شامل دو گروه وزن دار با T1 و وزن دار با T2، افراد بیمار را شناسایی می کند. با توجه به تفاوت های ماهیتی میان تصاویر وزن دار باT1 و وزن دار با T2، ویژگی های متفاوتی را از آنها استخراج نموده، سپس با بررسی مقادیر ویژه حاصل از این ویژگی ها، ابعاد فضای آنالیز را کاهش دادیم و خروجی را به دو تفکیک کننده غ...

Journal: :iranian red crescent medical journal 0
zahra majd department of pediatrics, shiraz university of medical sciences, shiraz, ir iran sezaneh haghpanah hematology research center, shiraz university of medical sciences, shiraz, ir iran gholam hossein ajami department of pediatrics, division of pediatric cardiology, shiraz university of medical sciences, shiraz, ir iran sara matin department of pediatrics, shiraz university of medical sciences, shiraz, ir iran hamid namazi department of orthopaedic surgery, shiraz university of medical sciences, shiraz, ir iran marzieh bardestani department of library and information science, college of humanities, khouzestan sciences and research branch, islamic azad university, ahvaz, ir iran

background iron-loaded cardiac complication is the essential cause of mortality in patients with thalassemia. early detection and treatment of cardiac over-load can reduce mortality. objectives the current study aimed to evaluate the relationship between serum ferritin levels and t2* magnetic resonance imaging (mri) of heart and liver and liver iron concentration (lic) to diagnose iron over loa...

Journal: :AJNR. American journal of neuroradiology 2008
S Siemonsen J Finsterbusch J Matschke A Lorenzen X-Q Ding J Fiehler

BACKGROUND AND PURPOSE Physiologic age-related T2* and T2' values are required as reference for comparison with disease-related deviations. In our study, T2* and T2' values (T2 values as control) were determined with MR imaging in healthy subjects to determine standard values and investigate age-related changes. MATERIALS AND METHODS Data of 50 patients without intraparenchymal pathology and ...

The principal function of a control chart is to help management distinguish different sources of variation in a process. Control charts are widely used as a graphical tool to monitor a process in order to improve the quality of the product. Chen and Hsieh (2007) have designed a T2 control chart using a Variable Sampling Size and Control limits (V SSC) scheme. They have shown that using the V SSC...

Journal: :Magnetic resonance in medicine 2014
Mehmet Akçakaya Tamer A Basha Sebastian Weingärtner Sébastien Roujol Sophie Berg Reza Nezafat

PURPOSE To develop an improved T2 prepared (T2 prep) balanced steady-state free-precession (bSSFP) sequence and signal relaxation curve fitting method for myocardial T2 mapping. METHODS Myocardial T2 mapping is commonly performed by acquisition of multiple T2 prep bSSFP images and estimating the voxel-wise T2 values using a two-parameter fit for relaxation. However, a two-parameter fit model ...

2016
Mohammed H. Alam Taigang He Dominique Auger Gillian C. Smith Peter Drivas Rick Wage Cemil Izgi Karen Symmonds Andreas Greiser Bruce S. Spottiswoode Lisa Anderson David Firmin Dudley J. Pennell

BACKGROUND There is a need for improved worldwide access to tissue iron quantification using T2* cardiovascular magnetic resonance (CMR). One route to facilitate this would be simple in-line T2* analysis widely available on MR scanners. We therefore compared our clinically validated and established T2* method at Royal Brompton Hospital (RBH T2*) against a novel work-in-progress (WIP) sequence w...

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