Iuga, Andra-Iza, Doerner, Jonas, Siedek, Florian, Haneder, Stefan, Byrtus, Jonathan, Luetkens, Julian A., Maintz, David and Hickethier, Tilman (2019). Computed tomography pulmonary angiograms using a novel dual-layer spectral detector Adjusted window settings are essential for diagnostic image quality. Medicine (Baltimore), 98 (33). PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS. ISSN 1536-5964
Full text not available from this repository.Abstract
Objective: The aim of this study was to determine optimal window settings for conventional polyenergetic and virtual monoenergetic images derived from computed tomography pulmonary angiogram (CTPA) examinations of a novel dual-layer spectral detector computed tomography system (DLCT). Methods: Monoenergetic (40 keV) and polyenergetic images of 50 CTPA examinations were calculated and the best individual window width and level (W/L) values were manually assessed. Optimized values were obtained afterwards based on regression analysis. Diameters of standardized pulmonary artery segments and subjective image quality parameters were evaluated and compared. Results: Attenuation and contrast-to-noise values were higher in monoenergetic than in polyenergetic images (P <=.001). Averaged best individual W/L for polyenergetic and monoenergetic were 1020/170 and 2070/480 HU, respectively. All adjusted W/L-settings varied significantly compared to standard settings (700/100 HU) and obtained higher subjective image quality scores. A systematic overestimation of artery diameters for standard window settings in monoenergetic images was observed. Conclusions: Appropriate W/L-settings are required to assess polyenergetic and monoenergetic CTPA images of a novel DLCT. W/L-settings of 1020/170 HU and 2070/480 HU were found to be the best averaged values for polyenergetic and monoenergetic CTPA images, respectively.
Item Type: | Journal Article | ||||||||||||||||||||||||||||||||||||
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URN: | urn:nbn:de:hbz:38-145095 | ||||||||||||||||||||||||||||||||||||
DOI: | 10.1097/MD.0000000000016606 | ||||||||||||||||||||||||||||||||||||
Journal or Publication Title: | Medicine (Baltimore) | ||||||||||||||||||||||||||||||||||||
Volume: | 98 | ||||||||||||||||||||||||||||||||||||
Number: | 33 | ||||||||||||||||||||||||||||||||||||
Date: | 2019 | ||||||||||||||||||||||||||||||||||||
Publisher: | LIPPINCOTT WILLIAMS & WILKINS | ||||||||||||||||||||||||||||||||||||
Place of Publication: | PHILADELPHIA | ||||||||||||||||||||||||||||||||||||
ISSN: | 1536-5964 | ||||||||||||||||||||||||||||||||||||
Language: | English | ||||||||||||||||||||||||||||||||||||
Faculty: | Unspecified | ||||||||||||||||||||||||||||||||||||
Divisions: | Unspecified | ||||||||||||||||||||||||||||||||||||
Subjects: | no entry | ||||||||||||||||||||||||||||||||||||
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Refereed: | Yes | ||||||||||||||||||||||||||||||||||||
URI: | http://kups.ub.uni-koeln.de/id/eprint/14509 |
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