منابع مشابه
T2*-based fiber orientation mapping
Recent MRI studies at high field have observed that, in certain white matter fiber bundles, the signal in T(2)*-weighted MRI (i.e. MRI sensitized to apparent transverse relaxivity) is dependent on fiber orientation θ relative to B(0). In this study, the characteristics of this dependency are quantitatively investigated at 7 T using ex-vivo brain specimens, which allowed a large range of rotatio...
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Free vibration characteristics of continuous grading fiber orientation (CGFO) beams resting on variable Winkler and two-parameter elastic foundations have been studied. The beam is under different boundary conditions and assumed to have arbitrary variations of fiber orientation in the thickness direction. The governing differential equations for beam vibration are being solved using Generalized...
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The ability to record accessory atrioventricular (AV) pathway activation consistently may be uniquely beneficial in improving pathway localization, identifying anatomic relations, and providing insight into unusual conduction properties. For the purpose of recording left AV accessory pathway activation, an electrode catheter was specially designed for use in the coronary sinus. The orthogonal c...
متن کاملOptimizing Part Quality with Orientation
The orientation of SFF-manufactured parts can have a signiicant eeect on the quality of the parts, in both surface eeects and strength. Currently, orientation is either ignored or set on the basis of experience. This paper takes some simple experiments and creates quantitative measures relating diierent aspects of part quality to orientation. This leads to several computational tools for optimi...
متن کاملWhite matter fiber orientation mapping based on T2* anisotropy
Introduction Recent studies have shown that T2 relaxation may be anisotropic [1-4]. This anisotropy has been attributed to the microscopic (sub-voxel level) anisotropic distribution of susceptibility perturbers. In white matter fiber bundles, these anisotropic pertubations could originate from compounds such as lipid and ferritin that may align with axons, and could generate magnetic field vari...
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ژورنال
عنوان ژورنال: Journal of the Textile Machinary Society
سال: 1958
ISSN: 1883-8715
DOI: 10.4188/transjtmsj1948.11.107