نتایج جستجو برای: diffusion

تعداد نتایج: 163312  

Journal: :international clinical neurosciences journal 0
mohammadreza shahmohammadi functional neurosurgery research center, shohada tajrish hospital,shahid beheshti university of medical sciences, tehran mohamad ali fazeli functional neurosurgery research center, shohada tajrish hospital,shahid beheshti university of medical sciences, tehran zahra janamiri student of medical imaging (mri), shahid beheshti university of medical sciences, tehran, iran reza asgari gorji functional neurosurgery research center, shohada tajrish hospital,shahid beheshti university of medical sciences, tehran

background and purpose : there has been no report in which preoperative evaluation of adc for prediction of post therapeutic outcome was presented. the aim of our study was to retrospectively evaluation the use of the apparent diffusion coefficient (adc) for the prediction of malignancy and the outcome of malignant astrocytic tumors. methods: we reviewed mri of 26 male and 14 female patients wi...

Journal: :iranian journal of radiology 0
ihab elaff computer engineering department, faculty of engineering, adnan menderes university, aydin, turkey; computer engineering department, faculty of engineering, adnan menderes university, aydin, turkey. tel: +90-2562137503, fax: +90-2562136686

materials and methods the segmentation process is evaluated using four different clustering methods with different number of clusters where some dti scalar indices for 10 human brains are processed. results the aim was to produce results with less segmentation error and a lower computational cost while attempting to minimizing boundary overlapping and minimizing the effect of artifacts due to m...

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

در این پژوهش با استفاده از معادله های رانش- نفوذ به شبیه سازی آشکارساز نوری فلز- نیم رسانا- فلز پرداخته شده است. دسته معادله های پواسون، پیوستگی چگالی الکترون و پیوستگی چگالی حفره در نظر گرفته شده و با بهره گیری از فن نیوتن- رافسون، به طور هم زمان حل شده اند. نتایج شبیه سازی نشان می دهد که مدل ارائه شده می تواند پاسخ افزاره به تابش نور را به ازای دو حالت ایستا و پویا محاسبه کند. نتیجه های به دس...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهرکرد - دانشکده منابع طبیعی 1393

گیاه مورد (myrtus communis l)، یکی از گیاهان دارویی با ارزش ایران است که اثرات دارویی آن اثبات شده است. در این مطالعه برگ های گیاه مورد در خرداد ماه 1392 در استان چهارمحال و بختیاری جمع آوری و به روش استخراج فلاونوئید، کروماتوگرافی لایه نازک (tlc) و خیساندن (maceration) عصاره گیری انجام شد. سپس اثر غلظت های مختلف عصاره های به دست آمده روی دو قارچ ساپرولگنیا (saprolegniaspp.) و فوزاریوم (fusariu...

Journal: :journal of medical signals and sensors 0
siham ait oussous saïd boujraf

the goal is assessing the diffusion magnetic resonance imaging (dmri) method effi ciency in characterizing focal hepatic lesions (fhls). about 28-fhl patients were studied in radiology and clinical imaging department of our university hospital using 1.5 tesla mri system between january 2010 and june 2011. patients underwent hepatic mri consisting of dynamic t1- and t2-weighted imaging. the dmri...

Journal: :international journal of molecular and clinical microbiology 0
saeid mahdavi omran department of medical parasitology & mycology, faculty of medicine, babol university of medical sciences, babol, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی بابل (babol university of medical sciences) mohammad amin moodi mazandaran university of medical sciences, sari, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی مازندران (mazandaran university of medical sciences) seyed mohammad bagher norozian amiri department of medical parasitology & mycology, faculty of medicine, babol university of medical sciences, babol, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی بابل (babol university of medical sciences) seyed javad mosavi department of medical parasitology & mycology, faculty of medicine, babol university of medical sciences, babol, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی بابل (babol university of medical sciences) seyed ali mohammad ghazi mir saeed dept. of internal medicine, faculty of medicine, babol university of medical sciences, babol, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی بابل (babol university of medical sciences) seyede marzie jabbari shiade faculty of medicine, kashan university of medical sciences, kashan, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی کاشان (kashan university of medical sciences) esmail kheradi

orange peel extract solution contains mucilage flavor and three types of glycosides. limonene is one of the terpenoides in some vegetables, fruits and food; that plays as an antioxidant in juice. as it has anti-microorganism effects on some bacteria, we carried out the antifungal effects of limonene versus orange extract. in the present study the effects of orange extract and two types of limon...

Journal: :iranian journal of radiology 0
si shen medical imaging center, the first affiliated hospital of jinan university, jinan university, guangzhou, china hao wang pain clinic, the first affiliated hospital of jinan university, jinan university, guangzhou, china; pain clinic, the first affiliated hospital of jinan university, jinan university, guangzhou, china. tel: +86-13430267880, fax: +86-2038688416 jing zhang medical imaging center, the first affiliated hospital of jinan university, jinan university, guangzhou, china fei wang medical imaging center, the first affiliated hospital of jinan university, jinan university, guangzhou, china si-run liu medical imaging center, the first affiliated hospital of jinan university, jinan university, guangzhou, china

conclusion adc, fa, and t2* values may quantitatively reflect the microstructural characteristics of np, therefore they could be used to detect the minimal changes of early ldd. results the adc, fa, and t2* values were different (p < 0.05) among different rois within the same disc or among corresponding rois in different level discs. while the average values of adc increased regularly with the ...

Journal: :iranian journal of radiology 0
mahsa raisi-nafchi department of radiology technology, school of allied medical sciences, shahid beheshti university of medical sciences, tehran, iran fariborz faeghi department of radiology technology, school of allied medical sciences, shahid beheshti university of medical sciences, tehran, iran; department of radiology technology, school of allied medical sciences, shahid beheshti university of medical sciences, tehran, iran alireza zali department of neurosurgery, functional neurosurgery research center, shohada tajrish hospital, shahid beheshti university of medical sciences, tehran, iran hamidreza haghighatkhah department of radiology, shohada tajrish hospital, shahid beheshti university of medical sciences, tehran, iran jalal jalal-shokouhi jam-e-jam medical imaging center, tehran, iran

background diffusion-weighted imaging (dwi) is a form of magnetic resonance imaging (mri) based on measuring the random brownian motion of water molecules within the biological tissues and is particularly useful in tumor characterization. objectives the purpose of this study was to evaluate the diagnostic value of dw mri and the apparent diffusion coefficient (adc) for preoperative grading of a...

Journal: :jundishapur journal of natural pharmaceutical products 0
behrooz eftekhar department of endodontics, ahvaz jundishapur university of medical sciences, ahvaz, ir iran eskandar moghimipour medicinal plants research center, ahvaz jundishapur university of medical sciences, ahvaz, ir iran ebrahim eini student research committee, ahvaz jundishapur university of medical sciences, ahvaz, ir iran; student research committee, ahvaz jundishapur university of medical sciences, ahvaz, ir iran. tel: +98-9163644166 mansour jafarzadeh department of endodontics, ahvaz jundishapur university of medical sciences, ahvaz, ir iran narges behrooz school of dental, ahvaz jundishapur university of medical sciences, ahvaz, ir iran

background intra canal medicaments are used to reduce the number of bacteria and reinfection in endodontic procedures. calcium hydroxide was introduced to endodontics by herman as an intracanal antimicrobial agent. objectives the aim of this study was to present an injectable formulation of calcium hydroxide then compare the final ph of this new formulation with metapaste and evaluate the effec...

Journal: :iranian journal of radiology 0
eun kyung park department of radiology, anam hospital, korea university college of medicine, seoul, korea kyu ran cho department of radiology, anam hospital, korea university college of medicine, seoul, korea; department of radiology, korea university college of medicine 73, inchon-ro, seongbuk-gu, seoul 02841, korea. tel: +82-29205578, fax: +82-29293796 bo kyoung seo department of radiology, ansan hospital, korea university college of medicine, gyeonggi-do, korea ok hee woo department of radiology, guro hospital, korea university college of medicine, seoul, korea sung bum cho department of radiology, anam hospital, korea university college of medicine, seoul, korea jeoung won bae department of surgery, anam hospital, korea university college of medicine, seoul, korea

results a low adc value was associated with lymph node metastasis (p < 0.01) and with high ki-67 protein levels (p = 0.03). there were no significant differences in the adc values among the histological grade (p = 0.48), molecular subtype (p = 0.51), tumor size (p = 0.46), and p53 protein level (p = 0.62). conclusion the pre-operative use of the 3.0 tesla dwi could provide information about the...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید