Determination of the mastoid surface area and volume based on micro-CT scanning of human temporal bones. Geometrical parameters depend on scanning resolutions

2016 ◽  
Vol 340 ◽  
pp. 127-134 ◽  
Author(s):  
Olivier Cros ◽  
Hans Knutsson ◽  
Mats Andersson ◽  
Elin Pawels ◽  
Magnus Borga ◽  
...  
Keyword(s):  
Surface Area ◽  
Ct Scanning ◽  
Geometrical Parameters ◽  
Micro Ct ◽  
Temporal Bones ◽  
Area And Volume

scholarly journals Determination of the Entire Stent Surface Area by a New Analytical Method

Materials ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 5633
Author(s):  
Muhammad Saqib ◽  
Ricardo Bernhardt ◽  
Markus Kästner ◽  
Natalia Beshchasna ◽  
Gianaurelio Cuniberti ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Surface Area ◽  
Complex Geometry ◽  
Micro Ct ◽  
Micro Computed Tomography ◽  
Laser Material Processing ◽  
Artery Disease ◽  
Stent Surface

Stenting is a widely used treatment procedure for coronary artery disease around the world. Stents have a complex geometry, which makes the characterization of their corrosion difficult due to the absence of a mathematical model to calculate the entire stent surface area (ESSA). Therefore, corrosion experiments with stents are mostly based on qualitative analysis. Additionally, the quantitative analysis of corrosion is conducted with simpler samples made of stent material instead of stents, in most cases. At present, several methods are available to calculate the stent outer surface area (SOSA), whereas no model exists for the calculation of the ESSA. This paper presents a novel mathematical model for the calculation of the ESSA using the SOSA as one of the main parameters. The ESSA of seven magnesium alloy stents (MeKo Laser Material Processing GmbH, Sarstedt, Germany) were calculated using the developed model. The calculated SOSA and ESSA for all stents are 33.34%(±0.26%) and 111.86 mm (±0.85 mm), respectively. The model is validated by micro-computed tomography (micro-CT), with a difference of 12.34% (±0.46%). The value of corrosion rates calculated using the ESSA computed with the developed model will be 12.34% (±0.46%) less than that of using ESSA obtained by micro-CT.

scholarly journals Direct determination of cell diameter, surface area, and volume with an electronic volume sensing flow cytometer

Cytometry ◽  
1983 ◽  
Vol 3 (6) ◽  
pp. 456-458 ◽  
Author(s):  
A. Schwartz ◽  
H. Sugg ◽  
T. W. Ritter ◽  
E. Fernandez-Repollet
Keyword(s):  
Surface Area ◽  
Direct Determination ◽  
Flow Cytometer ◽  
Cell Diameter ◽  
Area And Volume

3D reconstruction and calculation of surface area and volume of bell pepper

2007 ◽  
Vol 3 (1) ◽  
pp. 89-113
Author(s):  
Zoltán Gillay ◽  
László Fenyvesi
Keyword(s):  
3D Reconstruction ◽  
Surface Area ◽  
Three Dimensional ◽  
Reference Method ◽  
Bell Pepper ◽  
Three Dimensional Model ◽  
Acceptable Error ◽  
Volume Calculation ◽  
Bell Peppers ◽  
Area And Volume

There was a method developed that generates the three-dimensional model of not axisymmetric produce, based on an arbitrary number of photos. The model can serve as a basis for calculating the surface area and the volume of produce. The efficiency of the reconstruction was tested on bell peppers and artificial shapes. In case of bell peppers 3-dimensional reconstruction was created from 4 images rotated in 45° angle intervals. The surface area and the volume were estimated on the basis of the reconstructed area. Furthermore, a new and simple reference method was devised to give precise results for the surface area of bell pepper. The results show that this 3D reconstruction-based surface area and volume calculation method is suitable to determine the surface area and volume of definite bell peppers with an acceptable error.

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