نتایج جستجو برای: concentric annulus

تعداد نتایج: 14313  

Journal: :AJNR. American journal of neuroradiology 1999
V M Haughton T H Lim H An

BACKGROUND AND PURPOSE Because it diminishes the stiffness of the intervertebral disk, disk degeneration results in abnormal motions of the spine. Therefore, disk degeneration associated with back pain may indicate spinal fusion. The purpose of this study was to correlate the MR appearance and stiffness of lumbar intervertebral disks. METHODS Eighty-two lumbar spinal segments were imaged with...

1998
Jeff Bloch

A method is presented for estimating the background at a given location on a sky map by interpolating the estimated background from a set of concentric annuli which surround this location. If the background is nonuniform but smoothly varying, this method provides a more accurate (though less precise) estimate than can be obtained with a single annulus. Several applications of multi-annulus back...

Journal: :Computational Geometry: Theory and Applications 2021

An annulus is, informally, a ring-shaped region, often described by two concentric circles. The maximum-width empty problem asks to find an of certain shape with the maximum possible width that avoids given set n points in plane. This can also be interpreted as finding optimal location obnoxious facility among input points. In this paper, we study square and rectangular variants problem, presen...

2001
El Haj Evans Eisenstein Roberts w. e. b. johnson

Introduction: In health, the intervertebral disc is generally avascular and sparsely innervated. Those few nerves and blood vessels present are generally restricted to the outer areas of the annulus fibrosus where they lie predominantly between concentric layers of matrix (called lamellae). During disc degeneration, however, many more nerves are seen within the annulus, often in association wit...

Journal: :Journal of the Atomic Energy Society of Japan / Atomic Energy Society of Japan 1969

Journal: :International Journal of Applied Power Engineering (IJAPE) 2020

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