scholarly journals Dual-Energy Computed Tomography Arthrography of the Shoulder Joint Using Virtual Monochromatic Spectral Imaging: Optimal Dose of Contrast Agent and Monochromatic Energy Level

2014 ◽  
Vol 15 (6) ◽  
pp. 746 ◽  
Author(s):  
Chansik An ◽  
Yong-Min Chun ◽  
Sungjun Kim ◽  
Young Han Lee ◽  
Min Jeong Yun ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Energy Level ◽  
Contrast Agent ◽  
Shoulder Joint ◽  
Spectral Imaging ◽  
Optimal Dose ◽  
Dual Energy ◽  
Dual Energy Computed Tomography

scholarly journals Spectral Properties of Abdominal Tissues on Dual-energy Computed Tomography and the Effects of Contrast Agent

In Vivo ◽  
2021 ◽  
Vol 35 (6) ◽  
pp. 3277-3287
Author(s):  
DIANA A. KREUL ◽  
RAHEL A. KUBIK-HUCH ◽  
JOHN FROEHLICH ◽  
MICHAEL J. THALI ◽  
TILO NIEMANN
Keyword(s):  
Computed Tomography ◽  
Contrast Agent ◽  
Spectral Properties ◽  
Dual Energy ◽  
Dual Energy Computed Tomography

scholarly journals The Possibility for Iodine Concentration Determination in a Phantom with Known Titers of an Iodine-Containing Contrast Agent, by Using Dual-Energy Computed Tomography

2020 ◽  
Vol 100 (6) ◽  
pp. 335-338
Author(s):  
A. S. Chaban ◽  
V. E. Sinitsyn
Keyword(s):  
Computed Tomography ◽  
Contrast Agent ◽  
Measurement Errors ◽  
Iodine Concentration ◽  
Dual Energy ◽  
In Vivo Studies ◽  
Single Source ◽  
Dual Energy Computed Tomography ◽  
True Concentration

Objective: to study the capabilities of single-source dual-energy computed tomography (DECT) in quantifying the concentration of iodine in solutions.Material and methods. Single-source DECT was performed using a phantom containing a set of 5 tubes with a different titer of the iodine-containing contrast agent Iopamidol. Further, the obtained images were used to construct iodine maps; and the concentration of iodine was measured within the volume of the titrated contrast agent.Results. Despite a high correlation between the measured iodine concentration in solution with the true concentration (Pearson's correlation coefficient r = 0.98; p < 0.01), there is a measurement error that was 4.8 to 23% at different dilutions.Conclusion. Signal-source rapid voltage switching DECT does not allow precise measurements of the true concentration of iodine in solution. To eliminate measurement errors in further in vivo studies using singlesource DECT, it may be that attention must be paid to the measurement of normalized iodine concentration. 

scholarly journals A New Outlook on the Ability to Accumulate an Iodine Contrast Agent in Solid Lung Tumors Based on Virtual Monochromatic Images in Dual Energy Computed Tomography (DECT): Analysis in Two Phases of Contrast Enhancement

2021 ◽  
Vol 10 (9) ◽  
pp. 1870
Author(s):  
Arkadiusz Zegadło ◽  
Magdalena Żabicka ◽  
Aleksandra Różyk ◽  
Ewa Więsik-Szewczyk
Keyword(s):  
Computed Tomography ◽  
Contrast Agent ◽  
Energy Range ◽  
Contrast Enhancement ◽  
Lung Tumors ◽  
Dual Energy ◽  
Arterial Phase ◽  
X Ray ◽  
Dual Energy Computed Tomography ◽  
X Ray Absorption

For some time, dual energy computed tomography (DECT) has been an established method used in a vast array of clinical applications, including lung nodule assessment. The aim of this study was to analyze (using monochromatic DECT images) how the X-ray absorption of solitary pulmonary nodules (SPNs) depends on the iodine contrast agent and when X-ray absorption is no longer dependent on the accumulated contrast agent. Sixty-six patients with diagnosed solid lung tumors underwent DECT scans in the late arterial phase (AP) and venous phase (VP) between January 2017 and June 2018. Statistically significant correlations (p ≤ 0.001) of the iodine contrast concentration were found in the energy range of 40–90 keV in the AP phase and in the range of 40–80 keV in the VP phase. The strongest correlation was found between the concentrations of the contrast agent and the scanning energy of 40 keV. At the higher scanning energy, no significant correlations were found. We concluded that it is most useful to evaluate lung lesions in DECT virtual monochromatic images (VMIs) in the energy range of 40–80 keV. We recommend assessing SPNs in only one phase of contrast enhancement to reduce the absorbed radiation dose.

Dual-Energy Computed Tomography Gemstone Spectral Imaging

2016 ◽  
Vol 40 (2) ◽  
pp. 283-289
Author(s):  
Ching-Li Cheng ◽  
Hsiao-Huang Chang ◽  
Shih-Chi Ko ◽  
Pei-Jung Huang ◽  
Shan-Yang Lin
Keyword(s):  
Computed Tomography ◽  
Spectral Imaging ◽  
Dual Energy ◽  
Dual Energy Computed Tomography ◽  
Gemstone Spectral Imaging

scholarly journals Added value of iodine-specific imaging and virtual non-contrast imaging for gastrointestinal assessment using dual-energy computed tomography

2021 ◽  
Vol 11 ◽  
pp. 68
Author(s):  
Madison R. Kocher ◽  
Mark D. Kovacs ◽  
William Stewart ◽  
Brian P. Flemming ◽  
Shaun Hinen ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Clinical Practice ◽  
Spectral Imaging ◽  
Dual Energy ◽  
Gastrointestinal System ◽  
Added Value ◽  
Contrast Imaging ◽  
Dual Energy Computed Tomography ◽  
Case Examples ◽  
Pictorial Essay

Dual-energy computed tomography (DECT) has become increasingly available and can be readily incorporated into clinical practice. Although DECT can provide a wide variety of spectral imaging reconstructions, most clinically valuable information is available from a limited number of standard image reconstructions including virtual non-contrast and iodine overlay. The combination of these standard reconstructions can be used for specific diagnostic tasks that provide added value over traditional CT protocols. In this pictorial essay, the added value of these standard reconstructed images will be demonstrated by case examples for diseases specifically related to the gastrointestinal system.

Single-Source Dual-Energy Computed Tomography Detects Disk Injury in Patients with Vertebral Fractures

2019 ◽  
Author(s):  
Torsten Diekhoff ◽  
Michael Fuchs ◽  
Nils Engelhard ◽  
Kay-Geert Hermann ◽  
Michael Putzier ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Vertebral Fractures ◽  
Dual Energy ◽  
Single Source ◽  
Dual Energy Computed Tomography
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