نتایج جستجو برای: buildup bolus
تعداد نتایج: 15646 فیلتر نتایج به سال:
BACKGROUND/AIMS Swallowing is a complex function with the control of the swallowing center being located in the brain stem. Our aim in this investigation was to evaluate, in healthy volunteers, the oral and pharyngeal transit of 2 bolus volumes and 2 consistencies, and the influence of these boluses on the proportion of pharyngeal clearance duration/hyoid movement duration. METHODS Videofluor...
To improve imaging quality and to reduce contrast dose and radiation exposure, an adaptive bolus chasing CT angiography was proposed so that the bolus peak position and the imaging aperture can be synchronized. The performance of the proposed adaptive bolus chasing CT angiography was experimentally evaluated based on the actual bolus dynamics. The experimental results show that the controlled t...
Introduction In electron beam therapy bolus is often used to conform as closely as possible to the target volume while avoiding critical structures in the depth. In most cases a flexible bolus can cover the skin without air gap. However, under certain conditions it is difficult –or even not possible– to avoid air gaps between bolus and patient without reducing treatment quality. In a special cl...
The buildup process of coherent structures and patterns from the composite balance between conservative dissipative effects is a universal phenomenon that occurs in various areas physics, ranging quantum mechanics to astrophysics. Dissipative solitons are highly solutions nonlinear wave equations, provide an excellent research platform for ultrafast transient phenomena. Herein, by taking advant...
Background and Aims: During Cesarean section, hypotension occurs in the most of parturients, following spinal anesthesia. This prospective observational study was undertaken to determine efficacy two different Bolus Doses Phenylephrine for Prevention Spinal-Induced Hypotension during Section.
 Materials Methods: A total 120 parturients undergoing cesarean section were divided into groups g...
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