Visualisation by high resolution synchrotron X-ray phase contrast micro-tomography of gas films on submerged superhydrophobic leaves

2014 ◽  
Vol 188 (1) ◽  
pp. 61-70 ◽  
Author(s):  
Torsten Lauridsen ◽  
Kyriaki Glavina ◽  
Timothy David Colmer ◽  
Anders Winkel ◽  
Sarah Irvine ◽  
...  
Keyword(s):  
High Resolution ◽  
Phase Contrast ◽  
X Ray ◽  
Micro Tomography

scholarly journals Fractal Dimension Analysis of High-Resolution X-Ray Phase Contrast Micro-Tomography Images at Different Threshold Levels in a Mouse Spinal Cord

2018 ◽  
Vol 3 (4) ◽  
pp. 48 ◽  
Author(s):  
Laura Maugeri ◽  
Mauro DiNuzzo ◽  
Marta Moraschi ◽  
Charles Nicaise ◽  
Inna Bukreeva ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Fractal Dimension ◽  
High Resolution ◽  
Fractal Analysis ◽  
Phase Contrast ◽  
Threshold Level ◽  
Mouse Spinal Cord ◽  
X Ray ◽  
Threshold Levels ◽  
Micro Tomography

Fractal analysis is a powerful method for the morphological study of complex systems that is increasingly applied to biomedical images. Spatial resolution and image segmentation are crucial for the discrimination of tissue structures at the multiscale level. In this work, we have applied fractal analysis to high-resolution X-ray phase contrast micro-tomography (XrPCμT) images in both uninjured and injured tissue of a mouse spinal cord. We estimated the fractal dimension (FD) using the box-counting method on tomographic slices segmented at different threshold levels. We observed an increased FD in the ipsilateral injured hemicord compared with the contralateral uninjured tissue, which was almost independent of the chosen threshold. Moreover, we found that images exhibited the highest fractality close to the global histogram threshold level. Finally, we showed that the FD estimate largely depends on the image histogram regardless of tissue appearance. Our results demonstrate that the pre-processing of XrPCμT images is critical to fractal analysis and the estimation of FD.

A new species of anapid spider (Araneae: Araneoidea, Anapidae) in Eocene Baltic amber, imaged using phase contrast X-ray computed micro-tomography

Zootaxa ◽  
2011 ◽  
Vol 2742 (1) ◽  
pp. 60 ◽  
Author(s):  
DAVID PENNEY ◽  
ANDREW MCNEIL ◽  
DAVID I. GREEN ◽  
ROBERT BRADLEY ◽  
YURI M. MARUSIK ◽  
...  
Keyword(s):  
New Species ◽  
Phase Contrast ◽  
Baltic Amber ◽  
X Ray ◽  
The Family ◽  
X Ray Computed ◽  
Micro Tomography ◽  
The Baltic ◽  
A New Species ◽  
Eocene Amber

A new species of the extant spider family Anapidae is described from a fossil mature male in Eocene amber from the Baltic region and tentatively assigned to the genus Balticoroma Wunderlich, 2004. Phase contrast X-ray computed micro-tomography was used to reveal important features that were impossible to view using traditional microscopy. Balticoroma wheateri new species is easily diagnosed from all other anapids by having clypeal extensions that run parallel to the ectal surface of the chelicerae and in having the metatarsus of the first leg highly reduced and modified into what is presumably a y-shaped clasping structure. Although only a single extant anapid species occurs in northern Europe, the family was diverse in the Eocene. The discovery of yet another anapid species in Baltic amber supports the idea that Eocene European forests may have been a hotspot of evolution for this family of spiders.

High-resolution hard X-ray phase-contrast microscopy with a large-diameter and high-numerical-aperture zone plate

2002 ◽  
Vol 9 (3) ◽  
pp. 132-135 ◽  
Author(s):  
Yasushi Kagoshima ◽  
Yoshiyuki Yokoyama ◽  
Takashi Ibuki ◽  
Toshihiro Niimi ◽  
Yoshiyuki Tsusaka ◽  
...  
Keyword(s):  
High Resolution ◽  
Phase Contrast ◽  
Large Diameter ◽  
Numerical Aperture ◽  
Zone Plate ◽  
Phase Contrast Microscopy ◽  
X Ray ◽  
High Numerical Aperture ◽  
Contrast Microscopy

Design, development and first experiments on the X-ray imaging beamline at Indus-2 synchrotron source RRCAT, India

2015 ◽  
Vol 22 (6) ◽  
pp. 1531-1539 ◽  
Author(s):  
A. K. Agrawal ◽  
B. Singh ◽  
Y. S. Kashyap ◽  
M. Shukla ◽  
P. S. Sarkar ◽  
...  
Keyword(s):  
Phase Contrast ◽  
Imaging Techniques ◽  
Phase Contrast Imaging ◽  
Design Development ◽  
Contrast Imaging ◽  
Synchrotron Source ◽  
Full Field ◽  
X Ray ◽  
X Ray Imaging ◽  
Micro Tomography

A full-field hard X-ray imaging beamline (BL-4) was designed, developed, installed and commissioned recently at the Indus-2 synchrotron radiation source at RRCAT, Indore, India. The bending-magnet beamline is operated in monochromatic and white beam mode. A variety of imaging techniques are implemented such as high-resolution radiography, propagation- and analyzer-based phase contrast imaging, real-time imaging, absorption and phase contrast tomographyetc. First experiments on propagation-based phase contrast imaging and micro-tomography are reported.

High-resolution brain tumor visualization using three-dimensional x-ray phase contrast tomography

2007 ◽  
Vol 52 (23) ◽  
pp. 6923-6930 ◽  
Author(s):  
F Pfeiffer ◽  
O Bunk ◽  
C David ◽  
M Bech ◽  
G Le Duc ◽  
...  
Keyword(s):  
Brain Tumor ◽  
High Resolution ◽  
Phase Contrast ◽  
Three Dimensional ◽  
X Ray ◽  
Tumor Visualization ◽  
Phase Contrast Tomography
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