Determination of a new computed tomography method for measuring the glenoid version and comparing with a reference method. Radio-anatomical and retrospective study

2015 ◽  
Vol 40 (3) ◽  
pp. 525-529 ◽  
Author(s):  
Julien Andrin ◽  
Charbel Macaron ◽  
Pierre Pottecher ◽  
Pierre Martz ◽  
Emmanuel Baulot ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Retrospective Study ◽  
Reference Method ◽  
Glenoid Version ◽  
Tomography Method

Determination of Parametres of the Air-Void System in Airfield Pavement Concrete Using Computed Tomography

2017 ◽  
Author(s):  
Danuta Kowalska ◽  
Paweł Iwanowski ◽  
Agata Kowalewska
Keyword(s):  
Computed Tomography ◽  
Air Entrainment ◽  
Image Resolution ◽  
Hardened Concrete ◽  
Polished Section ◽  
Air Voids ◽  
Tomography Method ◽  
Air Void ◽  
Pavement Concrete

Immediately after completion airfield pavements begin a gradual deterioration that is attribute to several factors. One of the major elements contribute to airfield pavement deterioration is exposure to the environment (freezingthawing and de-icing salts). Air-voids microstructure in cement-based materials is an important feature related to the freeze-thaw durability of these materials since all the adverse influences are result of potentially harmful ionic fluids and aggressive gas transport through the concrete and the transport properties strongly depend on the morphology of the pores inside the concrete. For revealing the porous microstructure in airfield pavement concrete X-ray tomography method was used. New and advance methodologies have been developed to determine the basic parameters of air entrainment in concrete (total content of the air, specific surface area of the air-voids system, spacing factor and content of micropores) by summing the distances traversed across a given component along a series of regularly spaced lines in one or more planes intersecting the sample. Using the method mentioned above, to meet requirements of PN-EN 480-11 specification (describes procedure for microscopical determination of air voids characteristics in hardened concrete), the original software was applied – AVCT (Air Void by Computed Tomography) computer programme. The specimens for CT testing were cylinders extracted by drilling out from the investigated concrete core or cubic specimen. The CT method does not require any special processing of the surface of tested specimen as opposed the common method according to PN-EN 480-11, by which the properly polished section is a prerequisite for obtaining proper results of air voids characterization. The paper presents the results of the evaluation of air-voids microstructure in concrete conducted with the application of computed tomography method. Exemplary images of distribution and size of air-voids in concrete specimens have been presented. Special attention was paid to obtain effective image resolution.

Determination of the Activity of Pulmonary Tuberculosis: the Utility of High-Resolution Computed Tomography

2000 ◽  
Vol 42 (5) ◽  
pp. 757
Author(s):  
Myung Hee Chung ◽  
Hae Giu Lee ◽  
Won Jong Yu ◽  
Hong Jun Chung ◽  
Bo Sung Yang ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Pulmonary Tuberculosis ◽  
High Resolution Computed Tomography

Determination of heat losses for sections of main heat pipelines using the reference method

2017 ◽  
Vol 20 (1) ◽  
pp. 22-27
Author(s):  
O. Tsakanyan ◽  
◽  
V. Goloshchapov ◽  
S. Koshel ◽  
N. Ganzha ◽  
...  
Keyword(s):  
Reference Method ◽  
Heat Losses

Computed Tomography-Guided Percutaneous Infiltrations for Piriformis Syndrome: A Single-Center Retrospective Study

2020 ◽  
Vol 30 (2) ◽  
pp. 113-118
Author(s):  
D. Filippiadis ◽  
C. Gkizas ◽  
G. Velonakis ◽  
Dimitrios A. Flevas ◽  
Z. T. Kokkalis ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Retrospective Study ◽  
Piriformis Syndrome ◽  
Single Center
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