456 Brain Perfusion study using EPI : Difference of sequence and contrast media
نویسندگان
چکیده
منابع مشابه
the study of bright and surface discrete cavity solitons dynamics in saturable nonlinear media
امروزه سالیتون ها بعنوان امواج جایگزیده ای که تحت شرایط خاص بدون تغییر شکل در محیط منتشر می-شوند، زمینه مطالعات گسترده ای در حوزه اپتیک غیرخطی هستند. در این راستا توجه به پدیده پراش گسسته، که بعنوان عامل پهن شدگی باریکه نوری در آرایه ای از موجبرهای جفت شده، ظاهر می گردد، ضروری است، زیرا سالیتون های گسسته از خنثی شدن پراش گسسته در این سیستم ها بوسیله عوامل غیرخطی بوجود می آیند. گسستگی سیستم عامل...
Optimizing brain tissue contrast with EPI: a simulated annealing approach.
A new magnetization preparation and image acquisition scheme was developed to obtain high-resolution brain images with optimal tissue contrast. The pulse sequence was derived from an optimization process using simulated annealing, without prior assumptions with regard to the number of radiofrequency (RF) pulses and flip angles. The resulting scheme combined two inversion pulses with the acquisi...
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BACKGROUND Intra-arterial administration of radiographic contrast media (CM) is discussed to impair renal perfusion. The pathogenesis of contrast-induced Nephropathy (CIN) is still not clarified. OBJECTIVE This trial was performed to prove the effects of two CM with different molecular structure on renal perfusion. METHODS A prospective, randomized study on 16 pigs was designed to compare t...
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were reconstructed after 2-fold in-plane parallel imaging. Before and after using MB technique, the slice number was 6 and 18, respectively. Using MB excitation with an MB factor of 3 and blipped-CAIPI, three simultaneous excited slices were folded together with a phase shift. After reconstruction with the 'SliceGRAPPA' algorithm, the three folded slices were successfully separated and unaliase...
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ژورنال
عنوان ژورنال: Japanese Journal of Radiological Technology
سال: 1997
ISSN: 0369-4305,1881-4883
DOI: 10.6009/jjrt.kj00001356297