نتایج جستجو برای: 2 dimensional 2d
تعداد نتایج: 2890216 فیلتر نتایج به سال:
BACKGROUND Owing to its elliptical shape, the left ventricle outflow tract (LVOT) area is underestimated by two-dimensional (2D) diameter-based calculations which assume a circular shape. This results in overestimation of aortic stenosis (AS) by the continuity equation. In cases of moderate to severe AS, this overestimation can affect intraoperative clinical decision making (expectant managemen...
BACKGROUND/AIMS The purpose of this study was to compare the diagnostic validity of two-dimensional (2D) and three-dimensional (3D) ultrasonography (US) when predicting the extrathyroidal extension of papillary thyroid cancer. METHODS All 2D data were interpreted in real time and 3D data were stored, rendered using tomographic ultrasound imaging (TUI), and then reviewed retrospectively. RES...
There is no gold standard for the measurement of pulmonary regurgitation (PR) severity. Two-dimensional (2D) transthoracic echocardiography is most commonly used to quantify PR severity using color Doppler criteria for aortic regurgitation. However, this method is limited by visualization of only one or two dimensions of the proximal PR jet or vena contracta (VC) precluding accurate assessment ...
We derive universal relations for the rf spectroscopy of a two-dimensional Fermi gas consisting of two spin states interacting through an S-wave scattering length. The rf transition rate has a high-frequency tail that is proportional to the contact and displays logarithmic scaling violations, decreasing asymptotically like 1/(ω2ln2ω). Its coefficient is proportional to ln2'(a'(2D)/a(2D)), where...
conclusions we recommend the additional 2d-fluoroscopic tangential view for detection of screw misplacements caused by overlength, with penetration on the dorsal cortical surface of the distal radius, predominantly observed for the most lateral screw position. the use of intraoperative 3d fluoroscopy did not become accepted in our clinical routine, due to the technical demanding and time consum...
برای رفع نقصهای پوششها و دستیابی به پوششهای ضدخوردگی سبک و گرانکار، انواع نانومواد دوبعدی (2D) به پوششهای پلیمری افزوده میشوند تا پوششهای ضدخوردگی کارا در بلندمدت تهیه شوند. در این مقاله، ایدههای کلی طراحی پوششهای پلیمری کامپوزیتی مقاوم به خوردگی برای طیف گستردهای از نانومواد دوبعدی ارائه شده و بهطور نمونه توسعه گرافن، بور نیترید (BN)، مولیبدن دیسولفید (MoS2)، زیرکونیم ف...
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