scholarly journals Virtual monochromatic imaging in dual-source and dual-energy CT for visualization of acute ischemic stroke

2015 ◽  
Vol 67 (1) ◽  
pp. 103-107 ◽  
Author(s):  
Hidetake Hara ◽  
Hiroshi Muraishi ◽  
Hiroki Matsuzawa ◽  
Toshiyuki Inoue ◽  
Yasuo Nakajima ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Virtual Monochromatic Imaging ◽  
Monochromatic Imaging ◽  
Dual Source

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

scholarly journals Utility of single-energy and dual-energy computed tomography in clot characterization: An in-vitro study

2017 ◽  
Vol 23 (3) ◽  
pp. 279-284 ◽  
Author(s):  
Waleed Brinjikji ◽  
Gregory Michalak ◽  
Ramanathan Kadirvel ◽  
Daying Dai ◽  
Michael Gilvarry ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Receiver Operating Characteristic ◽  
Operating Characteristic ◽  
Area Under The Curve ◽  
In Vitro Study ◽  
Dual Energy ◽  
Dual Energy Ct

Background and purpose Because computed tomography (CT) is the most commonly used imaging modality for the evaluation of acute ischemic stroke patients, developing CT-based techniques for improving clot characterization could prove useful. The purpose of this in-vitro study was to determine which single-energy or dual-energy CT techniques provided optimum discrimination between red blood cell (RBC) and fibrin-rich clots. Materials and methods Seven clot types with varying fibrin and RBC densities were made (90% RBC, 99% RBC, 63% RBC, 36% RBC, 18% RBC and 0% RBC with high and low fibrin density) and their composition was verified histologically. Ten of each clot type were created and scanned with a second generation dual source scanner using three single (80 kV, 100 kV, 120 kV) and two dual-energy protocols (80/Sn 140 kV and 100/Sn 140 kV). A region of interest (ROI) was placed over each clot and mean attenuation was measured. Receiver operating characteristic curves were calculated at each energy level to determine the accuracy at differentiating RBC-rich clots from fibrin-rich clots. Results Clot attenuation increased with RBC content at all energy levels. Single-energy at 80 kV and 120 kV and dual-energy 80/Sn 140 kV protocols allowed for distinguishing between all clot types, with the exception of 36% RBC and 18% RBC. On receiver operating characteristic curve analysis, the 80/Sn 140 kV dual-energy protocol had the highest area under the curve for distinguishing between fibrin-rich and RBC-rich clots (area under the curve 0.99). Conclusions Dual-energy CT with 80/Sn 140 kV had the highest accuracy for differentiating RBC-rich and fibrin-rich in-vitro thrombi. Further studies are needed to study the utility of non-contrast dual-energy CT in thrombus characterization in acute ischemic stroke.

New Fast kVp Switching Dual-Energy CT: Reduced Severity of Beam Hardening Artifacts and Improved Image Quality in Reduced-Iodine Virtual Monochromatic Imaging

2020 ◽  
Vol 27 (11) ◽  
pp. 1586-1593
Author(s):  
Haruto Sugawara ◽  
Tomoko Takayanagi ◽  
Takuya Ishikawa ◽  
Yoshiaki Katada ◽  
Rika Fukui ◽  
...  
Keyword(s):  
Image Quality ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Beam Hardening ◽  
Virtual Monochromatic Imaging ◽  
Monochromatic Imaging
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