نتایج جستجو برای: dimensional ultrasound

تعداد نتایج: 503683  

Journal: :The British journal of radiology 2012
Z Abdool A H Sultan R Thakar

Endoanal ultrasound is now regarded as the gold standard for evaluating anal sphincter pathology in the investigation of anal incontinence. The advent of three-dimensional ultrasound has further improved our understanding of the two-dimensional technique. Endoanal ultrasound requires specialised equipment and its relative invasiveness has prompted clinicians to explore alternative imaging techn...

2000
Mingzhou Song Robert M. Haralick Florence H. Sheehan

The paper presents a ray tracing ultrasound imaging simulation method that accounts for the effects of reflection, scattering and attenuation. Two-dimensional echocardiograhpic images were synthesized using this method. Nonlinear effects introduced by the signal processing units in an ultrasound imaging system were also emulated. Threedimensional triangular facet mesh models were employed in re...

Journal: :The Journal of Thoracic and Cardiovascular Surgery 1982

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1391

مدلهای گارچ در فضاهای هیلبرت پایان نامه حاضر شامل دو بخش می باشد. در قسمت اول مدلهای اتورگرسیو تعمیم یافته مشروط به ناهمگنی واریانس در فضاهای هیلبرت را معرفی، مفاهیم ریاضی مورد نیاز در تحلیل این مدلها در دامنه زمان را مطرح کرده و آنها را مورد بررسی قرار می دهیم. بر اساس پیشرفتهایی که اخیرا در زمینه تئوری داده های تابعی و آماره های عملگری ایجاد شده است، فرآیندهایی که دارای مقادیر در فضاهای ...

Journal: :Donald School Journal of Ultrasound in Obstetrics and Gynecology 2007

2017
L Dalewyn E Deschepper J Gerris

Introduction Serial measurements of the number of follicles and their growth by ultrasound is a standard way of monitoring fertility treatments using controlled ovarian stimulation. This is stressful for both the patient and the professional. Self-operated endovaginal telemonitoring (SOET) is more patient friendly and less time-consuming. Aim of the study The goal of the study is to see if th...

2011
Eduardo Machado Carlos Castillo

Recent development of three-dimensional (3D) and four-dimensional ultrasound (4D), specially using tomographic ultrasound image (TUI), inverse mode, automatic volume calculation (AVC) and virtual organ computer-aided analysis (VOCAL), provided us with new possibilities to study fetal low urinary obstructions before 24th week. Ultrasound scan studies have been conducted in order to provide infor...

2013
Edyta Zielonka-Lamparska Andrzej Paweł Wieczorek

Due to the possibility to examine at the patient bedside or incubator, ultrasound imaging of the central nervous system, particularly through the anterior fontanelle, is the most common diagnostic examination performed in neonates and infants with neurological problems. Despite its common application, this method has certain limitations. These limitations are associated with cross-sections of t...

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