Technical Note: Relation between dual-energy subtraction of CT images for electron density calibration and virtual monochromatic imaging

2015 ◽  
Vol 42 (7) ◽  
pp. 4088-4093 ◽  
Author(s):  
Masatoshi Saito
Keyword(s):  
Electron Density ◽  
Ct Images ◽  
Dual Energy ◽  
Technical Note ◽  
Virtual Monochromatic Imaging ◽  
Monochromatic Imaging ◽  
Energy Subtraction

scholarly journals Virtual monochromatic imaging in dual-source dual-energy CT: Radiation dose and image quality

2011 ◽  
Vol 38 (12) ◽  
pp. 6371-6379 ◽  
Author(s):  
Lifeng Yu ◽  
Jodie A. Christner ◽  
Shuai Leng ◽  
Jia Wang ◽  
Joel G. Fletcher ◽  
...  
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Virtual Monochromatic Imaging ◽  
Monochromatic Imaging ◽  
Ct Radiation ◽  
Dual Source

Dual-Energy Multi–Detector Row CT with Virtual Monochromatic Imaging for Improving Patient-to-Patient Uniformity of Aortic Enhancement during CT Angiography: An in Vitro and in Vivo Study

Radiology ◽  
2014 ◽  
Vol 272 (3) ◽  
pp. 895-902 ◽  
Author(s):  
Daniele Marin ◽  
Ghaneh Fananapazir ◽  
Achille Mileto ◽  
Kingshuk Roy Choudhury ◽  
Joshua M. Wilson ◽  
...  
Keyword(s):  
Ct Angiography ◽  
Dual Energy ◽  
In Vivo Study ◽  
Virtual Monochromatic Imaging ◽  
Monochromatic Imaging

scholarly journals Metal artifact reduction techniques for single energy CT and dual-energy CT with various metal materials

BJR|Open ◽  
2019 ◽  
Vol 1 (1) ◽  
pp. bjro.20180045 ◽  
Author(s):  
Daisuke Kawahara ◽  
Shuichi Ozawa ◽  
Kazushi Yokomachi ◽  
Toru Higaki ◽  
Takehiro Shiinoki ◽  
...  
Keyword(s):  
Electron Density ◽  
Ct Images ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Ct Image ◽  
Metal Artifacts ◽  
Energy Reconstruction ◽  
Metal Artefact ◽  
Artefact Reduction ◽  
Metal Materials

Objective: The aim of the current study is to evaluate the effectiveness of reduction metal artifacts using kV-CT image with the single-energy based metal artefact reduction (SEMAR) technique by single-energy reconstruction, monochromatic CT and rED reconstructed by dual-energy reconstruction. Methods: Seven different metal materials (brass, aluminum, copper, stainless, steel, lead and titanium) were placed inside the water-based PMMA phantom. After DECT-based scan, the artefact index (AI) were evaluated with the kV-CT images with and without SEMAR by single-energy reconstruction, and raw-data based electron density (rED), monochromatic CT images by dual-energy reconstruction. Moreover, the AI with evaluated with rED and the converted ED images from the kV-CT and monochromatic CT images. Results: The minimum average value of the AI with all-metal inserts was approximately 80 keV. The AI without SEMAR was larger than that with SEMAR for the 80 kV and 135 kV CT images. In the comparison of the AI for the rED and ED images that were converted from 80 kV and 135 kV CT images with and without SEMAR, the monochromatic CT images of the PMMA phantom with inserted metal materials at 80 keV revealed that the kV-CT with SEMAR reduced the metal artefact substantially. Conclusion: The converted ED from the kV-CT and monochromatic CT images could be useful for a comparison of the AI using the same contrast scale. The kV-CT image with SEMAR by single-energy reconstruction was found to substantially reduce metal artefact. Advances in knowledge: The effectiveness of reduction of metal artifacts using single-energy based metal artefact reduction (SEMAR) technique and dual-energy CT (DECT) was evaluated the electron density conversion techniques.

Impact of Dual-Energy Multi–Detector Row CT with Virtual Monochromatic Imaging on Renal Cyst Pseudoenhancement: In Vitro and in Vivo Study

Radiology ◽  
2014 ◽  
Vol 272 (3) ◽  
pp. 767-776 ◽  
Author(s):  
Achille Mileto ◽  
Rendon C. Nelson ◽  
Ehsan Samei ◽  
Tracy A. Jaffe ◽  
Erik K. Paulson ◽  
...  
Keyword(s):  
Renal Cyst ◽  
Dual Energy ◽  
In Vivo Study ◽  
Virtual Monochromatic Imaging ◽  
Monochromatic Imaging

A new method to measure electron density and effective atomic number using dual-energy CT images

2015 ◽  
Vol 61 (1) ◽  
pp. 265-279 ◽  
Author(s):  
Luis Isaac Ramos Garcia ◽  
José Fernando Pérez Azorin ◽  
Julio F Almansa
Keyword(s):  
Electron Density ◽  
Atomic Number ◽  
Effective Atomic Number ◽  
Ct Images ◽  
Dual Energy ◽  
New Method ◽  
Dual Energy Ct
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