نتایج جستجو برای: Center field of view (CFOV)

تعداد نتایج: 21248693  

Journal: :iranian journal of nuclear medicine 0
mahidul haque prodhan department of nuclear engineering, university of dhaka, dhaka, bangladesh hasan talukder department of electrical and electronic engineering, university of dhaka, dhaka, bangladesh fazlul huq department of nuclear engineering, university of dhaka, dhaka, bangladesh zahid hasan mahmood department of electrical and electronic engineering, university of dhaka, dhaka, bangladesh

introduction: the different factors that affect the camera uniformity of single photon emission computed tomography (spect) technique have been analyzed including peak shift (%) and window width of energy. the effect of peak shift and window width on spect image uniformity has been investigated using a point source to perform intrinsic flood images. methods:the relation between calculated integ...

Fazlul Huq Hasan Talukder Mahidul Haque Prodhan Zahid Hasan Mahmood

Introduction: The different factors that affect the camera uniformity of Single Photon Emission Computed Tomography (SPECT) technique have been analyzed including peak shift (%) and window width of energy. The effect of peak shift and window width on SPECT image uniformity has been investigated using a point source to perform intrinsic flood images. Methods:</stro...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده علوم انسانی 1390

abstract al- muntazam by ibn al -jawzi is one of the greatest the book ancient book of texts on history of islam in the 6th century.it is very important one;because of including rare reports which are not found any where.in addition to historical reports,his outlook , in which embodies information on mythologies, milal wa nihal (sects and creeds), geography, and political, social and religiou...

Journal: :Journal of nuclear medicine : official publication, Society of Nuclear Medicine 2014
Jeffrey S Nelson Olav I Christianson Beth A Harkness Mark T Madsen Eugene Mah Stephen R Thomas Habib Zaidi Ehsan Samei

UNLABELLED Because γ cameras are generally susceptible to environmental conditions and system vulnerabilities, they require routine evaluation of uniformity performance. The metrics for such evaluations are commonly pixel value-based. Although these metrics are typically successful at identifying regional nonuniformities, they often do not adequately reflect subtle periodic structures; therefor...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه یاسوج - دانشکده ادبیات و علوم انسانی 1392

an investigation into oral interaction in language classes: a conversation analytic point of view the aim of this thesis is to analyze the interaction between language teachers and students in english language institutes. this work is done in the context of yasuj city. learning another language, which is in most cases english, involves many variables. one of these variables is the linguistic...

Journal: :Journal of nuclear medicine : official publication, Society of Nuclear Medicine 2009
Eric P Visser Jonathan A Disselhorst Maarten Brom Peter Laverman Martin Gotthardt Wim J G Oyen Otto C Boerman

UNLABELLED The Inveon small-animal PET scanner is characterized by a large, 127-mm axial length and a 161-mm crystal ring diameter. The associated high sensitivity is obtained by using all lines of response (LORs) up to the maximum ring difference (MRD) of 79, for which the most oblique LORs form acceptance angles of 38.3 degrees with transaxial planes. The result is 2 phenomena that are normal...

Journal: :Journal of neuroscience methods 2009
Tee Ean Cheng Karmen K Yoder Marc D Normandin Shannon L Risacher Alexander K Converse Joseph A Hampel Michael A Miller Evan D Morris

UNLABELLED To reduce imaging costs, we designed a head holder for scanning two rats simultaneously in small animal PET scanners. Our goals were (i) to maintain high sensitivity and (ii) to minimize repositioning error between scans. METHODS A semi-stereotaxic dual rat head holder was designed and constructed for dual rat scanning in our IndyPET-II scanner and the commercial microPET P4. It wa...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده ادبیات و علوم انسانی 1391

abstract: one of the most visited & important spaces in different countries by tourist are urban areas. the old tehran which major part is located in district 12 is historical showcase of the capital, but, its hiidden cultural attraction is not used as it should be. this thesis occasionally engage in studying the efficacy of correct installation of travel guide boards in welfare & easily acc...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1390

any change in the refractive index of a laser active medium can lead to serious degradation of beam quality, laser beam modes, laser performance and variation in the intensity distribution. alteration in the refractive index of laser active medium is especially notable in high power lasers. it is clear that in the laser beam production, the pumping agent induces a great amount of heat which...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اراک 1389

this study investigates the relationship between field-related cognitive styles and global reading comprehension of hypertext. technically, field dependency is prevailing dominance of field on perception of parts, while global comprehension is skim-like reading to grasp the general content. in this research project, 60 senior and junior students of arak university majoring in english literature...

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