Analysis of perfusion defects by causes other than acute pulmonary thromboembolism on contrast-enhanced dual-energy CT in consecutive 537 patients

2012 ◽  
Vol 81 (4) ◽  
pp. e647-e652 ◽  
Author(s):  
Bo Hyun Kim ◽  
Joon Beom Seo ◽  
Eun Jin Chae ◽  
Hyun Joo Lee ◽  
Hye Jeon Hwang ◽  
...  
Keyword(s):  
Pulmonary Thromboembolism ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Contrast Enhanced ◽  
Perfusion Defects ◽  
Acute Pulmonary Thromboembolism

Quantification of Lung Perfusion Blood Volume With Dual-Energy CT: Assessment of the Severity of Acute Pulmonary Thromboembolism

2014 ◽  
Vol 203 (2) ◽  
pp. 287-291 ◽  
Author(s):  
Ayami Sakamoto ◽  
Ichiro Sakamoto ◽  
Hiroki Nagayama ◽  
Hirofumi Koike ◽  
Eijun Sueyoshi ◽  
...  
Keyword(s):  
Blood Volume ◽  
Pulmonary Thromboembolism ◽  
Dual Energy ◽  
Lung Perfusion ◽  
Dual Energy Ct ◽  
Acute Pulmonary Thromboembolism

scholarly journals Dual-Energy Computed Tomography of the Lung in COVID-19 Patients: Mismatch of Perfusion Defects and Pulmonary Opacities

Diagnostics ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 870
Author(s):  
Saif Afat ◽  
Ahmed E. Othman ◽  
Konstantin Nikolaou ◽  
Sebastian Gassenmaier
Keyword(s):  
Computed Tomography ◽  
Dual Energy ◽  
Lung Damage ◽  
Rating System ◽  
Pulmonary Perfusion ◽  
Imaging Studies ◽  
Dual Energy Computed Tomography ◽  
Contrast Enhanced ◽  
Perfusion Defects

To evaluate contrast-enhanced dual-energy computed tomography (DECT) chest examinations regarding pulmonary perfusion patterns and pulmonary opacities in patients with confirmed COVID-19 disease. Fourteen patients with 24 DECT examinations performed between April and May 2020 were included in this retrospective study. DECT studies were assessed independently by two radiologists regarding pulmonary perfusion defects, using a Likert scale ranging from 1 to 4. Furthermore, in all imaging studies the extent of pulmonary opacities was quantified using the same rating system as for perfusion defects. The main pulmonary findings were ground glass opacities (GGO) in all 24 examinations and pulmonary consolidations in 22 examinations. The total lung scores after the addition of the scores of the single lobes showed significantly higher values of opacities compared to perfusion defects, with a median of 12 (9–18) for perfusion defects and a median of 17 (15–19) for pulmonary opacities (p = 0.002). Furthermore, mosaic perfusion patterns were found in 19 examinations in areas with and without GGO. Further studies will be necessary to investigate the pathophysiological background of GGO with maintained perfusion compared to GGO with reduced perfusion, especially regarding long-term lung damage and prognosis.

Characterization of Small Incidental Indeterminate Hypoattenuating Hepatic Lesions: Added Value of Single-Phase Contrast-Enhanced Dual-Energy CT Material Attenuation Analysis

2018 ◽  
Vol 211 (3) ◽  
pp. 571-579 ◽  
Author(s):  
Bhavik N. Patel ◽  
Michael Rosenberg ◽  
Federica Vernuccio ◽  
Juan Carlos Ramirez-Giraldo ◽  
Rendon Nelson ◽  
...  
Keyword(s):  
Phase Contrast ◽  
Single Phase ◽  
Dual Energy ◽  
Added Value ◽  
Dual Energy Ct ◽  
Contrast Enhanced ◽  
Hepatic Lesions

scholarly journals Diagnostic accuracy of color-coded virtual noncalcium reconstructions derived from portal venous phase dual-energy CT in the assessment of lumbar disk herniation

2021 ◽  
Author(s):  
Vitali Koch ◽  
Moritz H. Albrecht ◽  
Leon D. Gruenewald ◽  
Ibrahim Yel ◽  
Katrin Eichler ◽  
...  
Keyword(s):  
Diagnostic Accuracy ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Disk Herniation ◽  
Lumbar Disk Herniation ◽  
Portal Venous Phase ◽  
Lumbar Disk ◽  
Contrast Enhanced ◽  
Dual Source ◽  
Venous Phase

Abstract Objectives To investigate the diagnostic accuracy of color-coded contrast-enhanced dual-energy CT virtual noncalcium (VNCa) reconstructions for the assessment of lumbar disk herniation compared to unenhanced VNCa imaging. Methods A total of 91 patients were retrospectively evaluated (65 years ± 16; 43 women) who had undergone third-generation dual-source dual-energy CT and 3.0-T MRI within an examination interval up to 3 weeks between November 2019 and December 2020. Eight weeks after assessing unenhanced color-coded VNCa reconstructions for the presence and degree of lumbar disk herniation, corresponding contrast-enhanced portal venous phase color-coded VNCa reconstructions were independently analyzed by the same five radiologists. MRI series were additionally analyzed by one highly experienced musculoskeletal radiologist and served as reference standard. Results MRI depicted 210 herniated lumbar disks in 91 patients. VNCa reconstructions derived from contrast-enhanced CT scans showed similar high overall sensitivity (93% vs 95%), specificity (94% vs 95%), and accuracy (94% vs 95%) for the assessment of lumbar disk herniation compared to unenhanced VNCa images (all p > .05). Interrater agreement in VNCa imaging was excellent for both, unenhanced and contrast-enhanced CT (κ = 0.84 vs κ = 0.86; p > .05). Moreover, ratings for diagnostic confidence, image quality, and noise differed not significantly between unenhanced and contrast-enhanced VNCa series (all p > .05). Conclusions Color-coded VNCa reconstructions derived from contrast-enhanced dual-energy CT yield similar diagnostic accuracy for the depiction of lumbar disk herniation compared to unenhanced VNCa imaging and therefore may improve opportunistic retrospective lumbar disk herniation assessment, particularly in case of staging CT examinations. Key Points • Color-coded dual-source dual-energy CT virtual noncalcium (VNCa) reconstructions derived from portal venous phase yield similar high diagnostic accuracy for the assessment of lumbar disk herniation compared to unenhanced VNCa CT series (94% vs 95%) with MRI serving as a standard of reference. • Diagnostic confidence, image quality, and noise levels differ not significantly between unenhanced and contrast-enhanced portal venous phase VNCa dual-energy CT series. • Dual-source dual-energy CT might have the potential to improve opportunistic retrospective lumbar disk herniation assessment in CT examinations performed for other indications through reconstruction of VNCa images.

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