نتایج جستجو برای: multitracer pet

تعداد نتایج: 53805  

ژورنال: بسپارش 2016

پلی(اتیلن ترفتالات)، PET، بازیافتی در بسیاری از فراورده‌ها مانند الیاف، فرش، بطری‌های مواد غذایی و صنعتی و بسته‌بندی ظروف یک‌بار مصرف می‌شود. بنابراین، تولیدکنندگان برای غلبه بر مشکلات بازیابی و احیای این مواد فعالیت می‌کنند. جداسازی اجزای پلی‌وینیل کلرید (PVC) از پلی(اتیلن ترفتالات)، به ویژه در بطری‌های PET، حین فرایند بازیافت بسیار اهمیت دارد. زیرا PVC حتی در غلظت‌های بسیار کم، مشکلاتی را در ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی امیرکبیر(پلی تکنیک تهران) - دانشکده مهندسی 1386

همانند اغلب سیستمهای تصویربرداری، کارآیی و کیفیت تصاویر در pet نیز با نویز آماری محدود شده است. با محاسبه دقیق زمان ورود دو فوتون با انرژیkev 511 در حلقه آشکارسازهای دور بیمار، مکان نابودی قابل محدود شدن در یک بازه است. این تکنیک که به طور قابل ملاحظه ای می تواند نویز آماری در مقادیر بازسازی شده را کاهش دهد، tof pet نامیده می شود. تعدادی دوربین pet با توانایی اندازه گیری tof در دهه 80 میلادی سا...

Journal: :iranian journal of nuclear medicine 0
armaghan fard-esfahani research center for nuclear medicine, shariati hospital, tehran university of medical sciences, tehran, iran mehraneh marzban research center for nuclear medicine, shariati hospital, tehran university of medical sciences, tehran, iran alireza emami-ardekani research center for nuclear medicine, shariati hospital, tehran university of medical sciences, tehran, iran arman hassanzadeh-rad research center for nuclear medicine, shariati hospital, tehran university of medical sciences, tehran, iran babak fallahi research center for nuclear medicine, shariati hospital, tehran university of medical sciences, tehran, iran davood beiki research center for nuclear medicine, shariati hospital, tehran university of medical sciences, tehran, iran parham geramifar

a 60-year-old patient with testicular seminoma was referred for f-18 fdg pet/ct study to evaluate recurrence. in addition to hypermetabolic cervical, mediastinal and hilar lymph node tumoral metastases, segmental intense fdg uptake along the lumbar spinal cord suggestive of tumoral metastasis was noted which quite an unusual presentation is.  at the time of pet study the patient was symptomless...

2017
Ryogo Minamimoto Andrei Iagaru Mehran Jamali Dawn Holley Amir Barkhodari Shreyas Vasanawala Greg Zaharchuk

PURPOSE To compare the conspicuity of malignant lesions between FDG PET/CT and a new simultaneous, time-of-flight (TOF) enabled PET/MRI scanner. METHODS All patients underwent a single-injection of FDG, followed by a dual imaging protocol consisting of PET/CT followed by TOF PET/MRI. PET/CT and PET/MRI images were evaluated by two readers independently for areas of FDG uptake compatible with ...

2015
Isabel Rauscher Ambros J. Beer Christoph Schaeffeler Michael Souvatzoglou Moritz Crönlein Chlodwig Kirchhoff Gunther Sandmann Sebastian Fürst Robert Kilger Michael Herz Sybille Ziegler Markus Schwaiger Matthias Eiber

To evaluate the quality and diagnostic performance of F-Fluoride positron-emission tomography/magnetic resonance imaging (F-Fluoride PET/MR) compared to F-Fluoride positron-emission tomography/computed tomography (F-Fluoride PET/CT) imaging in patients with unclear foot pain. Methods: Twenty-two patients (9 men, 13 women; mean age 48±18 years, range: 20–78 years) were prospectively included in ...

2015
Martin J Willemink Mootaz Eldib Tim Leiner Zahi A Fayad Venkatesh Mani

Translational and Molecular Imaging Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA To evaluate the effect of surface coils for carotid MR imaging on PET quantification in a clinical simultaneous whole-body PET/MR scanner. A cylindrical phantom was filled with a homogeneous 2L water-FDG mixture at a starting dose of 301.2MBq. Clinical PET/MR and PET/CT systems were used to...

Journal: :پژوهش های علوم و صنایع غذایی ایران 0
(pages 1-10) n. sedaghat f. hosseini

in this study lemon juice were packaged at three type of packaging ( pet , pe and glass bottles ). the samples were stored ten weeks at 20 and 40 ◦c . physicochemical (ph, acidity, brix, vitamin c , so2 and formalin number ) and sensory properties of lemon juice were evaluated on every two weeks. the results showed that the two storage temperatures(20 and 40 ◦c ) had not any significant effect ...

Journal: :Journal of nuclear medicine : official publication, Society of Nuclear Medicine 1997
U Haberkorn A Altmann I Morr C Germann F Oberdorfer G van Kaick

UNLABELLED Using different tracers of tumor metabolism, the application of PET for monitoring gene therapy with the suicide gene herpes simplex virus thymidine kinase (HSVtk) is investigated in this in vitro study. METHODS Morris hepatoma cells were transfected with a retroviral vector bearing the HSVtk gene, and different clones were established by selection with the neomycin analog G418. Th...

Journal: :iranian journal of radiology 0
vahid alipour department of health management and economics, school of public health, tehran university of medical sciences, tehran, iran ahmad fayaz bakhsh department of health management and economics, school of public health, tehran university of medical sciences, tehran, iran; department of health management and economics, school of public health, tehran university of medical sciences, tehran, iran. tel: +98-2188951391

Journal: :vaccine research 0
p afrough pasteur institute of iran. tehran, iran. a behrouzi pasteur institute of iran. tehran, iran. m davari pasteur institute of iran. tehran, iran. ma malekan pasteur institute of iran. tehran, iran. a fateh pasteur institute of iran. tehran, iran. f vaziri pasteur institute of iran. tehran, iran.

introduction: neisseria meningitidis is a major causative agent of bacterial septicemia and meningitis in human. pora is a major component of the outer membrane of n. meningitidis and functions as a cationic porin. this study aimed to clone and determine the expression of pora as the first step for producing a proper antigen in a vaccine study against n. meningitidis. methods: an approximately ...

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