Virtual monochromatic image at lower energy level for assessing pancreatic ductal adenocarcinoma in fast kV-switching dual-energy CT

2020 ◽  
Vol 75 (4) ◽  
pp. 320.e17-320.e23
Author(s):  
Y. Noda ◽  
S. Goshima ◽  
T. Kaga ◽  
T. Ando ◽  
T. Miyoshi ◽  
...  
Keyword(s):  
Energy Level ◽  
Pancreatic Ductal Adenocarcinoma ◽  
Lower Energy ◽  
Dual Energy ◽  
Ductal Adenocarcinoma ◽  
Dual Energy Ct ◽  
Monochromatic Image ◽  
Lower Energy Level ◽  
Virtual Monochromatic Image

scholarly journals Pancreatic Ductal Adenocarcinoma: Interface Enhancement Gradient Measured on Dual-Energy CT Images Improves Prognostic Evaluation

2020 ◽  
Vol 2 (4) ◽  
pp. e190074
Author(s):  
Ahmed M. Amer ◽  
Yufeng Li ◽  
David Summerlin ◽  
Constantine M. Burgan ◽  
Michelle M. McNamara ◽  
...  
Keyword(s):  
Pancreatic Ductal Adenocarcinoma ◽  
Ct Images ◽  
Dual Energy ◽  
Ductal Adenocarcinoma ◽  
Dual Energy Ct ◽  
Prognostic Evaluation

scholarly journals Improvement of Beam Hardening Effects of Virtual Monochromatic Image in Dual-energy CT: A Electron Density Phantom Study

2020 ◽  
Vol 76 (2) ◽  
pp. 168-176
Author(s):  
Tetsuya Hirairi ◽  
Katsuhiro Ichikawa ◽  
Atsushi Urikura ◽  
Masanori Sugiyama ◽  
Satoshi Asegawa ◽  
...  
Keyword(s):  
Electron Density ◽  
Dual Energy ◽  
Phantom Study ◽  
Dual Energy Ct ◽  
Beam Hardening ◽  
Monochromatic Image ◽  
Virtual Monochromatic Image

scholarly journals A New Opacity-Sampling Model Atmosphere Program for Arbitrary Abundances

1993 ◽  
Vol 138 ◽  
pp. 87-97 ◽  
Author(s):  
Robert L. Kurucz
Keyword(s):  
Distribution Function ◽  
Energy Level ◽  
Lower Energy ◽  
Van Der Waals ◽  
Model Atmosphere ◽  
Function Model ◽  
Elemental Abundances ◽  
Lower Energy Level ◽  
Molecular Lines ◽  
Ap Stars

AbstractI have developed a new version of my model atmosphere program called ATLAS12. It recognizes more than 1000 species, each in up to 10 isotopic forms, including all ions of the elements up through Zn and the first 5 ions of heavier elements up through Es. The elemental abundances are treated as variable with depth. ATLAS12 has 6 input files of line data containing 58,000,000 atomic and molecular lines. For each line the wavelength, identification, lower energy level, gf, radiative, Stark, and van der Waals damping constants are packed into 16 bytes. At each wavelength point in a frequency integration the profiles of all the significant nearby lines are computed and summed. The program and line files will be distributed in the fall of 1992.There are no significant differences at A0 between an opacity-sampled model computed with ATLAS12 and opacity-distribution-function model computed with ATLAS9. ATLAS12 allows arbitrary abundances but is slower. The new program can be used to produce improved models for Am and Ap stars that include the effects of millions of lines.

Measurements of Sc I gf -values

1976 ◽  
Vol 351 (1667) ◽  
pp. 569-579 ◽  
Keyword(s):  
Energy Level ◽  
Heat Pipe ◽  
Lower Energy ◽  
Ground Term ◽  
Absolute Scale ◽  
Lower Energy Level ◽  
The Absolute

By means of a ‘heat pipe’ and the ‘hook method’ the gf -values for 98 transitions in neutral scandium between 200 and 650 nm have been measured. Of these transitions, 33 are unclassified lines that occur in pairs with the lower energy level identified, and 14 are unclassified but are believed to originate from one of the two levels of the ground term. The absolute scale of gf -values has been based on the measurements of Bell & Lyzenga (1976). We have compared our values to those in the literature.

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