نتایج جستجو برای: source ct

تعداد نتایج: 549064  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده مکانیک 1392

براکی تراپی سرطان پروستات به عنوان رایج ترین نوع درمان شناخته شده است. که در این روش درمانی دز بالایی از اشعه به طور مستقیم به غده پروستات داده می شود. در این تحقیق الگوریتمی جهت شناسایی موقعیت و تعداد دانه های کاشته شده درون پروستات بعد از کاشت با استفاده از پردازش و ثبت تصاویر رادیوگرافی دیجیتالی و ct جهت ارزیابی تعداد دقیق دانه ها حین عمل و 30 روز پس از کاشت استفاده گردید و همچنین جهت ارزیاب...

2018
Lucia Mancini

To satisfy the heterogeneous needs of X-ray CT users, flexible solutions are required both from the hardware and software point of view. The use of synchrotrons and microfocus X-ray sources present complementary approaches being characterized by different properties in terms of achievable spatial resolution, field of view and image contrast. The main aim of this event was to bring together expe...

Journal: :AIP Advances 2021

This paper proposes a fast and in situ remanent flux detection method for protection current transformer (CT) based on the fluxgate theory. A high frequency voltage source is connected to secondary side of CT, saturates core slightly positive or negative direction. The polarity decided by sign integral voltage. calculated with linear relationship between second harmonic component can be obtaine...

2008
Samuel M. Johnston

X-ray computed tomography (CT) is a popular tool for non-destructively producing cross-sectional and volumetric images of physical objects[1]. In this technology, an X-ray source and a detector are mounted on a rotating gantry, and X-ray images from many different angles are acquired and then passed to a reconstruction program to create volumetric images. Unfortunately, the gantry and the rotat...

2012
Josef Vymazal Aaron M. Rulseh Jiří Keller Ladislava Janouskova

BACKGROUND Cerebrovascular disease represents a major source of global mortality and morbidity. Imaging examinations play a critical role in the management of stroke patients, from establishing the initial diagnosis to determining and guiding further treatment. METHODS In this article, current CT and MRI methods employed in the management of stroke patients are reviewed, with an emphasis on i...

2017
Xiaoliang Chen Yanyan Xu Jianghui Duan Chuandong Li Hongliang Sun Wu Wang

To investigate the potential relationship between perfusion parameters from first-pass dual-input perfusion computed tomography (DI-PCT) and iodine uptake levels estimated from dual-energy CT (DE-CT).The pre-experimental part of this study included a dynamic DE-CT protocol in 15 patients to evaluate peak arterial enhancement of lung cancer based on time-attenuation curves, and the scan time of ...

Journal: :Journal of medical engineering 2013
Cristian T Badea Laurence W Hedlund G Allan Johnson

CT and digital subtraction angiography (DSA) are ubiquitous in the clinic. Their preclinical equivalents are valuable imaging methods for studying disease models and treatment. We have developed a dual source/detector X-ray imaging system that we have used for both micro-CT and DSA studies in rodents. The control of such a complex imaging system requires substantial software development for whi...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه یزد 1388

plagiarism in esl/efl learning contexts has been established as a dynamic and multi-layered phenomenon and has become a topic engaging many researchers in a heated debate in recent years. comparisons of student-generated texts with their source texts have shown that students rely on source texts in their writings and copying is a major strategy used by both l1 and l2 writers. in our country a...

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