Electron density and effective atomic number estimation in a maximum a posteriori framework for dual‐energy computed tomography

2020 ◽  
Vol 47 (9) ◽  
pp. 4137-4149
Author(s):  
Mikaël Simard ◽  
Esther Bär ◽  
Danis Blais ◽  
Hugo Bouchard
Keyword(s):  
Computed Tomography ◽  
Electron Density ◽  
Atomic Number ◽  
Effective Atomic Number ◽  
Dual Energy ◽  
Maximum A Posteriori ◽  
A Posteriori ◽  
Dual Energy Computed Tomography

Experimental feasibility of dual-energy computed tomography based on the Thomson scattering X-ray source

2018 ◽  
Vol 25 (6) ◽  
pp. 1797-1802 ◽  
Author(s):  
Zhijun Chi ◽  
Yingchao Du ◽  
Lixin Yan ◽  
Dong Wang ◽  
Hongze Zhang ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Electron Density ◽  
Light Source ◽  
Atomic Number ◽  
Effective Atomic Number ◽  
Thomson Scattering ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
X Ray ◽  
Dual Energy Computed Tomography

Unlike large-scale and expensive synchrotron radiation facilities, the Thomson scattering X-ray source can provide quasi-monochromatic, energy-tunable and high-brightness X-ray pulses with a small footprint and moderate cost, making it an excellent candidate for dual-energy and multi-energy imaging at laboratories and hospitals. Here, the first feasibility study on dual-energy computed tomography (CT) based on this type of light source is reported, and the effective atomic number and electron-density distribution of a standard phantom consisting of polytetrafluoroethylene, water and aluminium is derived. The experiment was carried out at the Tsinghua Thomson scattering X-ray source with peak energies of 29 keV and 68 keV. Both the reconstructed effective atomic numbers and the retrieved electron densities of the three materials were compared with their theoretical values. It was found that these values were in agreement by 0.68% and 2.60% on average for effective atomic number and electron density, respectively. These results have verified the feasibility of dual-energy CT based on the Thomson scattering X-ray source and will further expand the scope of X-ray imaging using this type of light source.

scholarly journals Clinical application of effective atomic number for classifying non-calcified coronary plaques by dual-energy computed tomography

2017 ◽  
Vol 261 ◽  
pp. 138-143 ◽  
Author(s):  
Shun Nakajima ◽  
Hiroyuki Ito ◽  
Tetsuya Mitsuhashi ◽  
Yutaka Kubo ◽  
Kazuhiro Matsui ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Clinical Application ◽  
Atomic Number ◽  
Effective Atomic Number ◽  
Dual Energy ◽  
Dual Energy Computed Tomography

scholarly journals Effective atomic number and electron density calibration with a dual-energy CT technique

2016 ◽  
Author(s):  
Christian David Trujillo-Bastidas ◽  
Olivia Amanda García-Garduño ◽  
José Manuel Lárraga-Gutiérrez ◽  
Arnulfo Martínez-Dávalos ◽  
Mercedes Rodríguez-Villafuerte
Keyword(s):  
Electron Density ◽  
Atomic Number ◽  
Effective Atomic Number ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Ct Technique
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