نتایج جستجو برای: system magnification

تعداد نتایج: 2235994  

2017
Jana Hornová Pavel Růžička Maroš Hrubina Eduard Šťastný Andrea Košková Petr Fulín Jiří Gallo Matej Daniel

Preoperative planning for total hip arthroplasty includes templating on anteroposterior radiographs. It is necessary to consider radiographic magnification in order to scale templates accurately. Studies dealing with hip templating report different values of radiographic magnification. It is not clear if the observed difference in magnification between the studies is caused by variability in st...

2004
Erzsébet Merényi Abha Jain

The twin of this paper, “Forbidden Magnification? I.” [1], presents systematic SOM simulations with the explicit magnification control scheme of Bauer, Der, and Herrmann [2] on data for which the theory does not guarantee success, namely data that are n-D, n > 2 and/or data whose components in the different dimensions are not statistically independent. For the unsupported n = 2 cases that we in...

2015
Christoph Kolja Boese Philipp Lechler Leonard Rose Jens Dargel Johannes Oppermann Peer Eysel Hansjörg Geiges Jan Bredow Gwendolen Reilly

Digital templating with external calibration markers is the standard method for planning total hip arthroplasty. We determined the geometrical basis of the magnification effect, compared magnification with external and internal calibration markers, and examined the influence on magnification of the position of the calibration markers, patient weight, and body mass index (BMI). A formula was der...

Journal: :Journal of the Society for Information Display 2012
Andrew Haun Russell L Woods Eli Peli

Electronic magnification of an image results in a decrease in its perceived contrast. The decrease in perceived contrast could be due to a perceived blur or to limited sampling of the range of contrasts in the original image. We measured the effect on perceived contrast of magnification in two contexts: either a small video was enlarged to fill a larger area, or a portion of a larger video was ...

Journal: :American Journal of Roentgenology 1974

Journal: :Journal of Research of the National Bureau of Standards 1955

Journal: :Monthly Notices of the Royal Astronomical Society 2010

Journal: :Monthly Notices of the Royal Astronomical Society 2011

2012

This white paper summarizes a study comparing MicroDose Diagnostic Scan to geometric magnification for imaging fine image details, and explains the efficiency of the Diagnostic Scan functionality of the MicroDose system based on two phantom studies. Highlights of these studies reveal: • Diagnostic Scan, an exclusive feature of Philips MicroDose Mammography, helps discern fine details in spot co...

2013
Florian Kriener Thomas Binder Manuel Wille

A shallow depth-of-field is often used as a creative element in photographs. This, however, comes at the cost of expensive and heavy camera equipment, such as large sensor DSLR bodies and fast lenses. In contrast, cheap small-sensor cameras with fixed lenses usually exhibit a larger depth-of-field than desirable. In this case a computational solution is suggesting, since a shallow depth-of-fiel...

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