scholarly journals Crystal structure, NIR luminescence and X-ray computed tomography of Nd3+:Ba0.3Lu0.7F2.7 nanospheres

2017 ◽  
Vol 46 (20) ◽  
pp. 6580-6587 ◽  
Author(s):  
Daniel González-Mancebo ◽  
Ana Isabel Becerro ◽  
Eugenio Cantelar ◽  
Fernando Cussó ◽  
Arnaud Briat ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Computed Tomography ◽  
X Ray ◽  
X Ray Computed ◽  
X Ray Absorption ◽  
Nir Luminescence

Uniform, hydrophilic Nd3+-doped Ba0.3Lu0.7F2.7 50 nm spheres are obtained in the absence of additives. Their NIR excitation and emission as well as their X-ray absorption make them ideal candidates as bioimaging probes.

scholarly journals Luminescence and X-ray Absorption Properties of Uniform Eu3+:(H3O)Lu3F10 Nanoprobes

Nanomaterials ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 1153 ◽  
Author(s):  
Daniel González-Mancebo ◽  
Ana Isabel Becerro ◽  
Ariadna Corral ◽  
Marcin Balcerzyk ◽  
Manuel Ocaña
Keyword(s):  
Computed Tomography ◽  
Emission Spectra ◽  
Luminescent Properties ◽  
Lanthanide Ions ◽  
Absorption Properties ◽  
X Ray ◽  
Water Dispersible ◽  
X Ray Computed ◽  
X Ray Absorption ◽  
Fluoride Nanoparticles

Due to the high atomic number of lutetium and the low phonon energy of the fluoride matrix, Lu-based fluoride nanoparticles doped with active lanthanide ions are potential candidates as bioprobes in both X-ray computed tomography and luminescent imaging. This paper shows a method for the fabrication of uniform, water-dispersible Eu3+:(H3O)Lu3F10 nanoparticles doped with different Eu contents. Their luminescent properties were studied by means of excitation and emission spectra as well as decay curves. The X-ray attenuation capacity of the phosphor showing the highest emission intensity was subsequently analyzed and compared with a commercial contrast agent. The results indicated that the 10% Eu3+-doped (H3O)Lu3F10 nanoparticles fabricated with the proposed polyol-based method are good candidates to be used as dual probes for luminescent imaging and X-ray computed tomography.

scholarly journals A Pedophysical Relationship between X-ray Computed Tomography and Electrical Resistivity Data

2020 ◽  
Vol 25 (2) ◽  
pp. 181-187
Author(s):  
Mihai O. Cimpoiaşu ◽  
Oliver Kuras ◽  
Tony Pridmore ◽  
Sacha J. Mooney
Keyword(s):  
Computed Tomography ◽  
Electrical Resistivity ◽  
Moisture Content ◽  
Root Zone ◽  
Resistivity Tomography ◽  
X Ray ◽  
Non Invasive ◽  
Zone Parameters ◽  
X Ray Computed ◽  
X Ray Absorption

Quantitatively linking observations from independent non-invasive soil assessment methods enhances our ability to understand root zone processes. Electrical Resistivity Tomography (ERT) and X-ray Computed Tomography (CT) are two advanced non-invasive technologies routinely employed in soil science. ERT allows 4D process monitoring ( e.g., solute transport) and is sensitive to changes in moisture content (MC) and soil texture. X-ray CT is a higher resolution method used to appraise soil structure. We measured the variation of electrical resistivity and X-ray absorption with gravimetric moisture content (GMC) for two distinct soil types. Experimental results were compared with existing pedophysical relationships that express these dependencies. Based on the good fit between measurements and model predictions, we formulated a new pedophysical relationship that links directly the two soil properties. This will allow a direct translation between ERT and X-ray data for the study of root-zone parameters under well-defined experimental circumstances.

scholarly journals Using X-ray-computed Tomography to Nondestructively Determine Maturity of Green Tomatoes

HortScience ◽  
1991 ◽  
Vol 26 (1) ◽  
pp. 45-47 ◽  
Author(s):  
Jeffrey K. Brecht ◽  
Robert L. Shewfelt ◽  
Joseph C. Garner ◽  
E.W. Tollner
Keyword(s):  
Computed Tomography ◽  
Tomato Fruit ◽  
Maturity Stage ◽  
Cross Sectional ◽  
X Ray ◽  
Significant Relationships ◽  
Maturity Class ◽  
X Ray Computed ◽  
Image Pixels ◽  
X Ray Absorption

Cross-sectional X-ray-computed tomography (X-ray CT) images through the equator of tomato fruit (Lycopersicon esculentum Mill., cv. Sunny) ranging in maturity from immature (Ml) to advanced mature green (M4) revealed localized differences in X-ray absorption related to the formation of locular gel during maturation of the fruit. While maturity stage was poorly correlated with average X-ray absorbance and standard deviation or with average fruit density and water content, significant relationships' existed between maturity stage “and the number of image pixels with absorbance values >10 (Ml vs. M2 vs. M3) or 20 (M3 vs. M4) Hounsfield units. Using discriminant analysis, a relationship was developed that correctly identified the maturity class of 77% of the fruit and placed 96% of the tomatoes into the correct or an adjacent class.

X-Ray Computed Tomography of Ultralightweight Metals

1999 ◽  
Vol 11 (1) ◽  
pp. 199-211
Author(s):  
J. M. Winter ◽  
R. E. Green ◽  
A. M. Waters ◽  
W. H. Green
Keyword(s):  
Computed Tomography ◽  
X Ray ◽  
X Ray Computed
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