نتایج جستجو برای: الیاف pet
تعداد نتایج: 58455 فیلتر نتایج به سال:
Introduction: Accurate staging plays an important role in management of patients with prostate cancer especially in high-risk group. Today, [68Ga]Ga-PSMA-11 PET/CT should be considered as the preferred imaging tool for treatment planning and initial staging of the disease. Methods: A total number of 628 patients with prostate cancer referred to...
در این بررسی امکان استفاده از الیاف استبرق در ساخت چندسازه الیاف طبیعی به همراه پلی پروپیلن مورد توجه قرار گرفت. اثرات درصد الیاف در چهار سطح (10، 20، 30 و 40 درصد) و جفت کننده مالییکی (mapp) در سه سطح (صفر، 5/1 و 3 درصد) بر خواص مکانیکی و حرارتی چندسازه چوب پلاستیک بررسی شد. نتایج آزمایش ها نشان داد که استفاده از mapp باعث بهبود خواص مکانیکی در جریان مخلوطسازی در فاز درون سطحی شده و سبب اتصال...
Introduction: Due to the large number of PET systems available in the market, it is not very easy to decide about the scanner of choice. Conducting a research in order to compare all different PET scanners is very time consuming and expensive and practically impossible. However, such comparison may be conducted using PET simulators. In this study, the performance of 6 different PET scanne...
Plastic (Polyethylene Terephthalate, PET) is now used as packaging material for a whole range of consumer products in addition to carbonated beverages. Although plastics are very useful product, but the disposal of these wastes has become a problem and is of great concern, particularly in our country. One of the solutions to the disposal of plastic wastes is recycling it...
ماتریس های پایه سیمانی دارای مقاومت کششی و شکل پذیری ناچیز می باشند. افزودن الیاف به این ماتریس ها سبب بهبود مشخصات مکانیکی آنها می شود. مقاومت کششی پس از ترک خوردگی مواد مرکب سیمانی مسلح شده با الیاف فولادی به صورت مستقیم با تعداد الیاف عبور کننده از عرض ترک و رفتار بیرون کشیده شدن هرکدام از الیاف مرتبط می باشد. بنابراین شناخت دقیق رفتار بیرون کشیدگی الیاف منفرد، به منظور فهم رفتار کششی تک محو...
Surface modified electrospun polyester (PET) nanofibers with cyclodextrin polymer (CDP) were produced (PET/CDP). CDP formation onto electrospun PET nanofibers was achieved by polymerization between citric acid (CTR, crosslinking agent) and cyclodextrin (CD). Three different types of native CD (α-CD, β-CD and γ-CD) were used to form CDP. Water-insoluble crosslinked CDP coating was permanently ad...
BACKGROUND The aim of this study was to compare the diagnostic accuracy of [18F]FDG-PET/MRI with PET/CT for the detection of liver metastases. METHODS 32 patients with solid malignancies underwent [18F]FDG-PET/CT and subsequent PET/MRI of the liver. Two readers assessed both datasets regarding lesion characterization (benign, indeterminate, malignant), conspicuity and diagnostic confidence. A...
Nowadays polymer nanocomposites have introduced as a new class of food packaging materials due to their enhanced mechanical, thermal, and barrier properties. In this study PET nano composites were prepared by melt blending of poly (ethylene terephthalate) pellets and mica nanoparticles. The morphology of PET/mica nanocomposites was characterized by X-ray diffraction and transmission electron mi...
Introduction:Brain imaging with F-18 fluorodeoxyglucose (18F-FDG) positron emission tomography or Tc-99m hexamethylpropyleneamine oxime (99mTc-HMPAO) SPECT is widely used for the evaluation of Alzheimer's dementia (AD); we aim to assess superiority of one method over the other. Methods: Twenty four patients with clinical diagnosi...
results fdg-pet/ct findings showed no evidence of malignant disease. there was diffusely increased fdg in soft tissue around the shoulders and hips and fdg-positive axillary lymph nodes consistent with pmr. background remitting seronegative symmetrical synovitis with pitting edema (rs3pe) is a rare, but well-defined syndrome comprising polyarthritis with symmetrical synovitis of the small joint...
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