منابع مشابه
Volume measurements of normal orbital structures by computed tomographic analysis.
Computed tomographic digital data and special off-line computer graphic analysis were used to measure volumes of normal orbital soft tissue, extraocular muscle, orbital fat, and total bony orbit in vivo in 29 patients (58 orbits). The upper limits of normal for adult bony orbit, soft tissue exclusive of the globe, orbital fat, and muscle are 30.1 cm3, 20.0 cm3, 14.4 cm3, and 6.5 cm3, respective...
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Both conventional and limited-angle computed-tomography (CT) are ill-posed problems, but where conventional CT has a small null space with few dimensions, limitedangle CT has a much larger null space and is severely ill-posed. The nature of the illposedness of limited-angle CT dictates that any limited-angle reconstruction method must interpolate from partial data in the Fourier domain. Large a...
متن کاملComparison of Industrial Aerated Structures Using X-Ray Computed Tomography
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متن کاملComputed Structures of Twist Boundaries Compared with Tem Observations
The structure of (111) twist boundaries in f.c.c. metals is investigated by computer simulation. For coincidence orientations in the vicinity of the twin orientation a characteristic six-star pattern has been found, in agreement with TEM observations on dislocation networks in nearcoherent twin boundaries in Au. Dislocation networks in near-coherent twin boundaries in Au have recently been stud...
متن کاملNormal Variations of Sphenoid Sinus and the Adjacent Structures Detected in Cone Beam Computed Tomography.
STATEMENT OF THE PROBLEM The sphenoid sinus is a common target of paranasal surgery. Functional endoscopic sinus surgery is likely to endanger the anatomic variations of vital structures adjacent to the sphenoid sinus. PURPOSE The aim of this study was to determine the variations of sphenoid sinus and the related structures by using cone-beam computed tomography (CBCT). MATERIALS AND METHOD...
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ژورنال
عنوان ژورنال: Nature
سال: 1974
ISSN: 0028-0836,1476-4687
DOI: 10.1038/248179a0