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  • 1
    Electronic Resource
    Electronic Resource
    Infection versus neoplasm in the spine: differentiation by MRI and diagnostic pitfalls (1993)
    Springer
    European radiology 3 (1993), S. 439-446 
    Details
    ISSN: 1432-1084
    Keywords: Spine infection ; Spine MRI studies ; Spine neoplasms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract MRI images of 135 patients with spine infection and 81 patients with spine neoplasm were retrospectively analysed in order to identify criteria that will help in distinguishing infection from neoplasm and in differentiating the forms of spine infection. Disc involvement occurred in 93% of infections and only 1% of neoplasms. Features of tuberculous spondylitis included paraspinal soft tissue abscesses (95%), vertebral collapse (91%), pathognomonic intraosseous abscess seen on Gd-enhanced images (84%), epidural extension (68%), gibbus (26%), skip lesions (16%) and posterior element involvement (11%). Pyogenic and brucellar infections had comparable features, i. e. predilection for the lower lumbar spine, preservation of vertebral morphology, minimal granulation tissue production and epidural extension. Primary neoplasms affected solitary vertebrate while secondary neoplasms demonstrated skip lesions and frequent extraosseous soft tissue masses. Posterior elements were frequently affected in both. MRI is a useful method for distinguishing infection from neoplasm in the spine and for differentiating tuberculous spondylitis from other infections in the majority of cases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00221421
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Application of uniform cubic B-spline curves to machine-tool control (1991)
    Springer
    Journal of intelligent and robotic systems 4 (1991), S. 393-402 
    Details
    ISSN: 1573-0409
    Keywords: Machine tool ; numerical control ; interpolation ; B-spline
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The application of B-spline functions in the domain of machine-tool control can be efficient only if it is possible to simultaneously control the shape of a contour and the speed along this contour. The paper describes a method allowing us to control the speed of a tool moving along a contour defined by an uniform cubic B-spline. This method is based upon the discretization of the B-spline parameter with respect to both a given geometrical error at to the desired speed law.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00314942
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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