Four-dimensional x-ray attenuation model of the human heart and the coronary vasculature for assessment of CT system capability

2001 ◽  
Author(s):  
Peter M. Edic ◽  
Maria Iatrou ◽  
Harvey E. Cline ◽  
A. N. Ishaque ◽  
Erdogan Cesmeli ◽  
...  
Keyword(s):  
Human Heart ◽  
Coronary Vasculature ◽  
Attenuation Model ◽  
X Ray ◽  
Ct System ◽  
System Capability

Electron Density and Effective Atomic Number Measurement by Using a Newly Developing Photon Counting CT System

2020 ◽  
Vol 38 ◽  
pp. 93-99
Author(s):  
Hiroshi Sakurai ◽  
Kazushi Hoshi ◽  
Yosuke Harasawa ◽  
Daiki Ono ◽  
Kun Zhang ◽  
...  
Keyword(s):  
Electron Density ◽  
Atomic Number ◽  
Photon Counting ◽  
Effective Atomic Number ◽  
Image Data ◽  
Detector Response ◽  
Simple Method ◽  
Attenuation Coefficients ◽  
X Ray ◽  
Ct System

We developed the photon counting CT system by using a conventional laboratory X-ray source and a CdTe line sensor. Attenuation coefficients were obtained from the measured CT image data. Our suggested method for deriving the electron density and effective atomic number from the measured attenuation coefficients was tested experimentally. The accuracy of the electron densities and effective atomic numbers are about <5 % (the averages of absolute values are 2.6 % and 3.1 %, respectively) for material of 6< Z and Zeff <13. Our suggested simple method, in which we do not need the exact source X-ray spectrum and detector response function, achieves comparable accuracy to the previous reports.

A low-cost geometry calibration procedure for a modular cone-beam X-ray CT system

2020 ◽  
Vol 35 (3) ◽  
pp. 252-265 ◽  
Author(s):  
V. Nguyen ◽  
J. De Beenhouwer ◽  
J. G. Sanctorum ◽  
S. Van Wassenbergh ◽  
S. Bazrafkan ◽  
...  
Keyword(s):  
Low Cost ◽  
Calibration Procedure ◽  
Cone Beam ◽  
X Ray ◽  
Ct System ◽  
Geometry Calibration

Development of submicrometer resolution x-ray CT system at SPring-8

2002 ◽  
Author(s):  
Kentaro Uesugi ◽  
Yoshio Suzuki ◽  
Naoto Yagi ◽  
Akira Tsuchiyama ◽  
Tsukasa Nakano
Keyword(s):  
X Ray ◽  
Ct System

Non-destructive Microstructural Evaluation of Intact and Restored Human Teeth Using Tabletop X-Ray $$\upmu $$ μ CT System

2017 ◽  
Vol 36 (1) ◽  
Author(s):  
A. Fatima ◽  
V. K. Kulkarni ◽  
A. K. Agrawal ◽  
N. R. Banda ◽  
P. S. Sarkar ◽  
...  
Keyword(s):  
Human Teeth ◽  
X Ray ◽  
Microstructural Evaluation ◽  
Ct System ◽  
Non Destructive
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