نتایج جستجو برای: open mri
تعداد نتایج: 496963 فیلتر نتایج به سال:
PURPOSE The purpose of this study was to report clinical results of open excision of extra-articular ganglion cysts around the knee joint combined with arthroscopic management of intra-articular pathologies if present. MATERIALS AND METHODS Of the total 107 cases of cystic lesions around the knee, 23 cases of extra-articular ganglion cysts were reviewed between January 2006 and July 2011. The...
OBJECTIVE The purpose of this study was to compare the diagnostic accuracy of MRI, MR arthrography, and ultrasound for the diagnosis of rotator cuff tears through a meta-analysis of the studies in the literature. MATERIALS AND METHODS Articles reporting the sensitivities and specificities of MRI, MR arthrography, or ultrasound for the diagnosis of rotator cuff tears were identified. Surgical ...
Compressed Sensing MRI (CS-MRI) has provided theoretical foundations upon which the time-consuming MRI acquisition process can be accelerated. However, it primarily relies on iterative numerical solvers which still hinders their adaptation in time-critical applications. In addition, recent advances in deep neural networks have shown their potential in computer vision and image processing, but t...
Compressed Sensing MRI (CS-MRI) has provided theoretical foundations upon which the time-consuming MRI acquisition process can be accelerated. However, it primarily relies on iterative numerical solvers which still hinders their adaptation in time-critical applications. In addition, recent advances in deep neural networks have shown their potential in computer vision and image processing, but t...
Presently, EPR and fluorescent biosensors are sole choice of in vivo bioimaging of NO and accurate measurement still remains a problem. We propose different NO biosensors as potent imaging contrast agents using multimodal bioimaging techniques of MRI, EPR and fluorescent imaging with their limitations and quantitative limits. Our focus in this paper is on different characteristics of known bios...
سابقه و هدف :سردرد یکی از علل شایع مراجعه بیماران سرپایی می باشد. حدود 90 درصد افراد حداقل یک بار در سال دچار سردرد می شوند. تعداد زیادی از پزشکان و بیماران نگران ضایعات داخل مغزی به عنوان علت سردرد هستند و تصویربرداری از مغز در تشخیص این ضایعات حائز اهمیت است. هدف ازاین پژوهش بررسی یافته های نورورادیولوژیک احتمالی در mri مغز بیماران مبتلا به سردرد بود. مواد و روش ها :این مطالعه توصیفی بر روی ب...
زمینه و هدف: آمار انجام mri کمر در کشور بالا بوده و بر اساس مطالعات قبلی در حدود نیمی از کل موارد درخواست mri را شامل می شود، لذا این مطالعه جهت بررسی ضرورت درخواست mri لومبوساکرال در افراد تحت پوشش بیمه مکمل شهر تهران که مبتلا به کمردرد بودند و مقایسه آن با گایدلاین های (guidelines) معتبر انجام شد.روش بررسی: در این مطالعه مقطعی اطلاعات پرونده 274 بیمار تحت پوشش بیمه مکمل در شرکت بیمه دانا که m...
background : magnetic resonance imaging (mri) offers higher diagnostic accuracy for brain lesions caused by heroin abuse compared to compute tomography (ct) scan. these lesions have a low signal on t1-weighted (t1w) images and a high signal on t2-weighted (t2w) and fluid-attenuated inversion recovery (flair) images. this study aimed to evaluate the role of diffusion-weighted mri (dwi-mri) in he...
Aalto University, P.O. Box 11000, FI-00076 Aalto www.aalto.fi Author Juhani Dabek Name of the doctoral dissertation Method development for ultra-low-field magnetic resonance imaging and magnetoencephalography Publisher School of Science Unit Department of Biomedical Engineering and Computational Science Series Aalto University publication series DOCTORAL DISSERTATIONS 42/2014 Field of research ...
Multiecho echo-planar imaging (EPI) was implemented for blood-oxygenation-level-dependent functional MRI at 1.5 T and compared to single-echo EPI with and without parallel imaging acceleration. A time-normalized breath-hold task using a block design functional MRI protocol was carried out in combination with up to four echo trains per excitation and parallel imaging acceleration factors R = 1-3...
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