scholarly journals X-ray micro-tomographic data of live larvae of the beetle Cacosceles newmannii

2021 ◽  
Author(s):  
Philipp Lehmann ◽  
Marion Javal ◽  
Anton du Plessis ◽  
Muofhe Tshibalanganda ◽  
John S. Terblanche
Keyword(s):  
Image Segmentation ◽  
3D Models ◽  
Volumetric Data ◽  
Volume Data ◽  
X Ray ◽  
Segmentation Methods ◽  
Body Sizes ◽  
Tomographic Data ◽  
Micro Tomography

Quantifying insect respiratory structures and their variation has remained challenging due to their microscopic size. Here we measure insect tracheal volume using X-ray micro-tomography (µCT) scanning (at 15 µm resolution) on living, sedated larvae of the cerambycid beetle Cacosceles newmannii across a range of body sizes. In this paper we provide the full volumetric data and 3D models for 12 scans, providing novel data on repeatability of imaging analyses and structural tracheal trait differences provided by different image segmentation methods. The volume data is provided here with segmented tracheal regions as 3D models.

scholarly journals X-ray micro-tomographic data of live larvae of the beetle Cacosceles newmannii

Gigabyte ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Philipp Lehmann ◽  
Marion Javal ◽  
Anton Du Plessis ◽  
Muofhe Tshibalanganda ◽  
John S. Terblanche
Keyword(s):  
Image Segmentation ◽  
3D Models ◽  
Volumetric Data ◽  
Volume Data ◽  
X Ray ◽  
Segmentation Methods ◽  
Body Sizes ◽  
Tomographic Data ◽  
Micro Tomography

Quantifying insect respiratory structures and their variation has remained challenging due to their microscopic size. Here we measure insect tracheal volume using X-ray micro-tomography (μCT) scanning (at 15 μm resolution) on living, sedated larvae of the cerambycid beetle Cacosceles newmannii across a range of body sizes. In this paper we provide the full volumetric data and 3D models for 12 scans, providing novel data on repeatability of imaging analyses and structural tracheal trait differences provided by different image segmentation methods. The volume data is provided here with segmented tracheal regions as 3D models.

Comparison of deep learning-based image segmentation methods for the detection of voids in X-ray images of microelectronic components

2021 ◽  
Author(s):  
Tobias Schiele ◽  
Andreas Jansche ◽  
Timo Bernthaler ◽  
Anton Kaiser ◽  
Daniel Pfister ◽  
...  
Keyword(s):  
Image Segmentation ◽  
Deep Learning ◽  
X Ray ◽  
Segmentation Methods ◽  
Microelectronic Components

Using Gamma-Ray and X-Ray Computed Tomography for Porosity Quantification of Reservoir Analogue Rocks

2020 ◽  
Author(s):  
Abraão Nova ◽  
Frederico Ribeiro ◽  
Pamalla Oliveira ◽  
Daniel Amancio ◽  
Cássia Machado ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Image Processing ◽  
Image Segmentation ◽  
Gamma Ray ◽  
Porous System ◽  
X Ray ◽  
Reservoir Rocks ◽  
Core Samples ◽  
Segmentation Methods ◽  
Gamma Ray Computed Tomography

<p>During the last few decades, X-ray micro-computed tomography (µCT) has been largely used to characterize rock properties and to create high-resolution 3D digital image volumes. It has allowed access to important information about porous systems in reservoir rocks. However, the reliable quantification of porosity of rocks which present porous volumes ranging from centimeter to nanometer scale remains a challenge. Assessment of nano scale porous volume is very difficult by image segmentation techniques, due to the intrinsic limits of the x-ray imaging method. Moreover, image processing for analysis of various types of porosity in the same sample, including microporosity could be computationally expensive. We present a method based in the Gamma-Ray computed tomography (axis attenuation) that can substantially improve the limits presented by conventional X-ray microtomography. This study compared the porosity values acquired by typical segmentation methods for microtomography images, and by the values obtained trough the proposed method of gamma-ray computed tomography to calculate the porosity. Results of both approaches were compared to porosity measurements obtained through experimental equipment (helium porosimeter). These analyses were performed in core samples of limestones and sandstones analogous of Brazilian oil reservoirs. The Gamma Ray Attenuation method (axis attenuation) presented a better correlation (R² = 0.9588) to the experimental measurements when compared to the image segmentation methods (R² = 0.9194). The results suggest that Industrial application of gamma ray tomography for precise evaluation of large number of core samples can be highly effective. Furthermore, the gamma ray data can be integrated with data provided by conventional µCT image processing to complement information regarding morphological aspects.</p><p>Keywords: Porous System, X-ray microtomography, Gamma Ray tomography,  Reservoir rocks</p>

A Fast Ray-Tracing Algorithm for X-Ray Imaging Simulation

2012 ◽  
Vol 198-199 ◽  
pp. 1361-1366
Author(s):  
Chao Fu ◽  
Ao Dong Shen ◽  
Li Min Luo
Keyword(s):  
Ray Tracing ◽  
3D Models ◽  
Practical Significance ◽  
Volume Data ◽  
X Ray ◽  
Natural Modes ◽  
X Ray Imaging ◽  
Imaging Simulation ◽  
Tracing Algorithm

X-ray radiography has more and more application value and X-ray simulation system has practical significance for improving the quality of X-ray imaging and replacing the expensive devices but it’s a time-consuming work. This paper proposes an improved fast ray-tracing method extended from Siddon’s and Zhao’s methods. For a 2D array, we compute level by level which has natural modes, by comparing the incident x-coordinate with the characteristic constant. In the case of 3D models, the volume data are back projected into 1D linked list and compute indices and lengths similarly like the case of 2D. Compared with Zhao’s method, the new method avoids skipping parametric planes and computing several starting voxels and ending voxels in one level. The time consumed in the new algorithm has reduced by 5/6 regarding the conventional Siddon’s algorithm.

X-ray micro tomography in the scanning electron microscope

1978 ◽  
Vol 36 (1) ◽  
pp. 106-107 ◽  
Author(s):  
W. Brünger
Keyword(s):  
Electron Beam ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Target Surface ◽  
The Body ◽  
X Rays ◽  
Cross Sectional ◽  
X Ray ◽  
Micro Tomography ◽  
Scanning Electron

Reconstructive tomography is a new technique in diagnostic radiology for imaging cross-sectional planes of the human body /1/. A collimated beam of X-rays is scanned through a thin slice of the body and the transmitted intensity is recorded by a detector giving a linear shadow graph or projection (see fig. 1). Many of these projections at different angles are used to reconstruct the body-layer, usually with the aid of a computer. The picture element size of present tomographic scanners is approximately 1.1 mm2.Micro tomography can be realized using the very fine X-ray source generated by the focused electron beam of a scanning electron microscope (see fig. 2). The translation of the X-ray source is done by a line scan of the electron beam on a polished target surface /2/. Projections at different angles are produced by rotating the object.During the registration of a single scan the electron beam is deflected in one direction only, while both deflections are operating in the display tube.

Organic chemistry lecture course and exercises based on true scale models

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Felix Lederle ◽  
Eike G. Hübner
Keyword(s):  
Organic Chemistry ◽  
Bond Length ◽  
3D Models ◽  
Poly Lactic Acid ◽  
X Ray ◽  
Bond Angles ◽  
Chemical Structures ◽  
Scale Models ◽  
Hands On ◽  
Scaled Models

Abstract3D models of chemical structures are an important tool for chemistry lectures and exercises. Usually, simplified models based on standard bond length and angles are used. These models allow for a visualized discussion of (stereo)chemical aspects, but they do not represent the true spatial conditions. 3D-printing technologies facilitate the production of scale models. Several protocols describe the process from X-ray structures, calculated geometries or virtual molecules to printable files. In contrast, only a few examples describe the integration of scaled models in lecture courses. True bond angles and scaled bond lengths allow for a detailed discussion of the geometry and parameters derived therefrom, for example double bond character, aromaticity and many more. Here, we report a complete organic chemistry/stereochemistry lecture course and exercise based on a set of 37 scale models made from poly(lactic acid) as sustainable material. All models have been derived from X-ray structures and quantum chemical calculations. Consequently, the models reflect the true structure as close as possible. A fixed scaling factor of 1 : 1.8·108 has been applied to all models. Hands-on measuring of bond angles and bond length leads to an interactive course. The course has been evaluated with a very positive feedback.

Sign in / Sign up

Export Citation Format

Share Document